--- /dev/null
+/*
+ * Copyright (c) 2006-2008 Intel Corporation
+ * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
+ * Copyright (c) 2008 Red Hat Inc.
+ *
+ * DRM core CRTC related functions
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no representations
+ * about the suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Authors:
+ * Keith Packard
+ * Eric Anholt <eric@anholt.net>
+ * Dave Airlie <airlied@linux.ie>
+ * Jesse Barnes <jesse.barnes@intel.com>
+ */
+#include <linux/ctype.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_modeset_lock.h>
+#include <drm/drm_atomic.h>
+
+#include "drm_crtc_internal.h"
+#include "drm_internal.h"
+
+static struct drm_framebuffer *
+internal_framebuffer_create(struct drm_device *dev,
+ struct drm_mode_fb_cmd2 *r,
+ struct drm_file *file_priv);
+
+/* Avoid boilerplate. I'm tired of typing. */
+#define DRM_ENUM_NAME_FN(fnname, list) \
+ const char *fnname(int val) \
+ { \
+ int i; \
+ for (i = 0; i < ARRAY_SIZE(list); i++) { \
+ if (list[i].type == val) \
+ return list[i].name; \
+ } \
+ return "(unknown)"; \
+ }
+
+/*
+ * Global properties
+ */
+static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
+ { DRM_MODE_DPMS_ON, "On" },
+ { DRM_MODE_DPMS_STANDBY, "Standby" },
+ { DRM_MODE_DPMS_SUSPEND, "Suspend" },
+ { DRM_MODE_DPMS_OFF, "Off" }
+};
+
+DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
+
+static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
+ { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
+ { DRM_PLANE_TYPE_PRIMARY, "Primary" },
+ { DRM_PLANE_TYPE_CURSOR, "Cursor" },
+};
+
+/*
+ * Optional properties
+ */
+static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
+ { DRM_MODE_SCALE_NONE, "None" },
+ { DRM_MODE_SCALE_FULLSCREEN, "Full" },
+ { DRM_MODE_SCALE_CENTER, "Center" },
+ { DRM_MODE_SCALE_ASPECT, "Full aspect" },
+};
+
+static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
+ { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
+ { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
+ { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
+};
+
+/*
+ * Non-global properties, but "required" for certain connectors.
+ */
+static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
+ { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
+ { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
+ { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
+};
+
+DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
+
+static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
+ { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
+ { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
+ { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
+};
+
+DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
+ drm_dvi_i_subconnector_enum_list)
+
+static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
+ { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
+ { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
+ { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
+ { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
+ { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
+};
+
+DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
+
+static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
+ { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
+ { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
+ { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
+ { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
+ { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
+};
+
+DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
+ drm_tv_subconnector_enum_list)
+
+static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
+ { DRM_MODE_DIRTY_OFF, "Off" },
+ { DRM_MODE_DIRTY_ON, "On" },
+ { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
+};
+
+struct drm_conn_prop_enum_list {
+ int type;
+ const char *name;
+ struct ida ida;
+};
+
+/*
+ * Connector and encoder types.
+ */
+static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
+ { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
+ { DRM_MODE_CONNECTOR_VGA, "VGA" },
+ { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
+ { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
+ { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
+ { DRM_MODE_CONNECTOR_Composite, "Composite" },
+ { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
+ { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
+ { DRM_MODE_CONNECTOR_Component, "Component" },
+ { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
+ { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
+ { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
+ { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
+ { DRM_MODE_CONNECTOR_TV, "TV" },
+ { DRM_MODE_CONNECTOR_eDP, "eDP" },
+ { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
+ { DRM_MODE_CONNECTOR_DSI, "DSI" },
+};
+
+static const struct drm_prop_enum_list drm_encoder_enum_list[] = {
+ { DRM_MODE_ENCODER_NONE, "None" },
+ { DRM_MODE_ENCODER_DAC, "DAC" },
+ { DRM_MODE_ENCODER_TMDS, "TMDS" },
+ { DRM_MODE_ENCODER_LVDS, "LVDS" },
+ { DRM_MODE_ENCODER_TVDAC, "TV" },
+ { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
+ { DRM_MODE_ENCODER_DSI, "DSI" },
+ { DRM_MODE_ENCODER_DPMST, "DP MST" },
+};
+
+static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
+ { SubPixelUnknown, "Unknown" },
+ { SubPixelHorizontalRGB, "Horizontal RGB" },
+ { SubPixelHorizontalBGR, "Horizontal BGR" },
+ { SubPixelVerticalRGB, "Vertical RGB" },
+ { SubPixelVerticalBGR, "Vertical BGR" },
+ { SubPixelNone, "None" },
+};
+
+void drm_connector_ida_init(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
+ ida_init(&drm_connector_enum_list[i].ida);
+}
+
+void drm_connector_ida_destroy(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
+ ida_destroy(&drm_connector_enum_list[i].ida);
+}
+
+/**
+ * drm_get_connector_status_name - return a string for connector status
+ * @status: connector status to compute name of
+ *
+ * In contrast to the other drm_get_*_name functions this one here returns a
+ * const pointer and hence is threadsafe.
+ */
+const char *drm_get_connector_status_name(enum drm_connector_status status)
+{
+ if (status == connector_status_connected)
+ return "connected";
+ else if (status == connector_status_disconnected)
+ return "disconnected";
+ else
+ return "unknown";
+}
+EXPORT_SYMBOL(drm_get_connector_status_name);
+
+/**
+ * drm_get_subpixel_order_name - return a string for a given subpixel enum
+ * @order: enum of subpixel_order
+ *
+ * Note you could abuse this and return something out of bounds, but that
+ * would be a caller error. No unscrubbed user data should make it here.
+ */
+const char *drm_get_subpixel_order_name(enum subpixel_order order)
+{
+ return drm_subpixel_enum_list[order].name;
+}
+EXPORT_SYMBOL(drm_get_subpixel_order_name);
+
+static char printable_char(int c)
+{
+ return isascii(c) && isprint(c) ? c : '?';
+}
+
+/**
+ * drm_get_format_name - return a string for drm fourcc format
+ * @format: format to compute name of
+ *
+ * Note that the buffer used by this function is globally shared and owned by
+ * the function itself.
+ *
+ * FIXME: This isn't really multithreading safe.
+ */
+const char *drm_get_format_name(uint32_t format)
+{
+ static char buf[32];
+
+ snprintf(buf, sizeof(buf),
+ "%c%c%c%c %s-endian (0x%08x)",
+ printable_char(format & 0xff),
+ printable_char((format >> 8) & 0xff),
+ printable_char((format >> 16) & 0xff),
+ printable_char((format >> 24) & 0x7f),
+ format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
+ format);
+
+ return buf;
+}
+EXPORT_SYMBOL(drm_get_format_name);
+
+/*
+ * Internal function to assign a slot in the object idr and optionally
+ * register the object into the idr.
+ */
+static int drm_mode_object_get_reg(struct drm_device *dev,
+ struct drm_mode_object *obj,
+ uint32_t obj_type,
+ bool register_obj)
+{
+ int ret;
+
+ mutex_lock(&dev->mode_config.idr_mutex);
+ ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
+ if (ret >= 0) {
+ /*
+ * Set up the object linking under the protection of the idr
+ * lock so that other users can't see inconsistent state.
+ */
+ obj->id = ret;
+ obj->type = obj_type;
+ }
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ return ret < 0 ? ret : 0;
+}
+
+/**
+ * drm_mode_object_get - allocate a new modeset identifier
+ * @dev: DRM device
+ * @obj: object pointer, used to generate unique ID
+ * @obj_type: object type
+ *
+ * Create a unique identifier based on @ptr in @dev's identifier space. Used
+ * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
+ * modeset identifiers are _not_ reference counted. Hence don't use this for
+ * reference counted modeset objects like framebuffers.
+ *
+ * Returns:
+ * New unique (relative to other objects in @dev) integer identifier for the
+ * object.
+ */
+int drm_mode_object_get(struct drm_device *dev,
+ struct drm_mode_object *obj, uint32_t obj_type)
+{
+ return drm_mode_object_get_reg(dev, obj, obj_type, true);
+}
+
+static void drm_mode_object_register(struct drm_device *dev,
+ struct drm_mode_object *obj)
+{
+ mutex_lock(&dev->mode_config.idr_mutex);
+ idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+}
+
+/**
+ * drm_mode_object_put - free a modeset identifer
+ * @dev: DRM device
+ * @object: object to free
+ *
+ * Free @id from @dev's unique identifier pool. Note that despite the _get
+ * postfix modeset identifiers are _not_ reference counted. Hence don't use this
+ * for reference counted modeset objects like framebuffers.
+ */
+void drm_mode_object_put(struct drm_device *dev,
+ struct drm_mode_object *object)
+{
+ mutex_lock(&dev->mode_config.idr_mutex);
+ idr_remove(&dev->mode_config.crtc_idr, object->id);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+}
+
+static struct drm_mode_object *_object_find(struct drm_device *dev,
+ uint32_t id, uint32_t type)
+{
+ struct drm_mode_object *obj = NULL;
+
+ mutex_lock(&dev->mode_config.idr_mutex);
+ obj = idr_find(&dev->mode_config.crtc_idr, id);
+ if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
+ obj = NULL;
+ if (obj && obj->id != id)
+ obj = NULL;
+ /* don't leak out unref'd fb's */
+ if (obj && (obj->type == DRM_MODE_OBJECT_FB))
+ obj = NULL;
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ return obj;
+}
+
+/**
+ * drm_mode_object_find - look up a drm object with static lifetime
+ * @dev: drm device
+ * @id: id of the mode object
+ * @type: type of the mode object
+ *
+ * Note that framebuffers cannot be looked up with this functions - since those
+ * are reference counted, they need special treatment. Even with
+ * DRM_MODE_OBJECT_ANY (although that will simply return NULL
+ * rather than WARN_ON()).
+ */
+struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
+ uint32_t id, uint32_t type)
+{
+ struct drm_mode_object *obj = NULL;
+
+ /* Framebuffers are reference counted and need their own lookup
+ * function.*/
+ WARN_ON(type == DRM_MODE_OBJECT_FB);
+ obj = _object_find(dev, id, type);
+ return obj;
+}
+EXPORT_SYMBOL(drm_mode_object_find);
+
+/**
+ * drm_framebuffer_init - initialize a framebuffer
+ * @dev: DRM device
+ * @fb: framebuffer to be initialized
+ * @funcs: ... with these functions
+ *
+ * Allocates an ID for the framebuffer's parent mode object, sets its mode
+ * functions & device file and adds it to the master fd list.
+ *
+ * IMPORTANT:
+ * This functions publishes the fb and makes it available for concurrent access
+ * by other users. Which means by this point the fb _must_ be fully set up -
+ * since all the fb attributes are invariant over its lifetime, no further
+ * locking but only correct reference counting is required.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
+ const struct drm_framebuffer_funcs *funcs)
+{
+ int ret;
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ kref_init(&fb->refcount);
+ INIT_LIST_HEAD(&fb->filp_head);
+ fb->dev = dev;
+ fb->funcs = funcs;
+
+ ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
+ if (ret)
+ goto out;
+
+ dev->mode_config.num_fb++;
+ list_add(&fb->head, &dev->mode_config.fb_list);
+out:
+ mutex_unlock(&dev->mode_config.fb_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_framebuffer_init);
+
+/* dev->mode_config.fb_lock must be held! */
+static void __drm_framebuffer_unregister(struct drm_device *dev,
+ struct drm_framebuffer *fb)
+{
+ mutex_lock(&dev->mode_config.idr_mutex);
+ idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ fb->base.id = 0;
+}
+
+static void drm_framebuffer_free(struct kref *kref)
+{
+ struct drm_framebuffer *fb =
+ container_of(kref, struct drm_framebuffer, refcount);
+ struct drm_device *dev = fb->dev;
+
+ /*
+ * The lookup idr holds a weak reference, which has not necessarily been
+ * removed at this point. Check for that.
+ */
+ mutex_lock(&dev->mode_config.fb_lock);
+ if (fb->base.id) {
+ /* Mark fb as reaped and drop idr ref. */
+ __drm_framebuffer_unregister(dev, fb);
+ }
+ mutex_unlock(&dev->mode_config.fb_lock);
+
+ fb->funcs->destroy(fb);
+}
+
+static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
+ uint32_t id)
+{
+ struct drm_mode_object *obj = NULL;
+ struct drm_framebuffer *fb;
+
+ mutex_lock(&dev->mode_config.idr_mutex);
+ obj = idr_find(&dev->mode_config.crtc_idr, id);
+ if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
+ fb = NULL;
+ else
+ fb = obj_to_fb(obj);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ return fb;
+}
+
+/**
+ * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
+ * @dev: drm device
+ * @id: id of the fb object
+ *
+ * If successful, this grabs an additional reference to the framebuffer -
+ * callers need to make sure to eventually unreference the returned framebuffer
+ * again, using @drm_framebuffer_unreference.
+ */
+struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
+ uint32_t id)
+{
+ struct drm_framebuffer *fb;
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ fb = __drm_framebuffer_lookup(dev, id);
+ if (fb) {
+ if (!kref_get_unless_zero(&fb->refcount))
+ fb = NULL;
+ }
+ mutex_unlock(&dev->mode_config.fb_lock);
+
+ return fb;
+}
+EXPORT_SYMBOL(drm_framebuffer_lookup);
+
+/**
+ * drm_framebuffer_unreference - unref a framebuffer
+ * @fb: framebuffer to unref
+ *
+ * This functions decrements the fb's refcount and frees it if it drops to zero.
+ */
+void drm_framebuffer_unreference(struct drm_framebuffer *fb)
+{
+ DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
+ kref_put(&fb->refcount, drm_framebuffer_free);
+}
+EXPORT_SYMBOL(drm_framebuffer_unreference);
+
+/**
+ * drm_framebuffer_reference - incr the fb refcnt
+ * @fb: framebuffer
+ *
+ * This functions increments the fb's refcount.
+ */
+void drm_framebuffer_reference(struct drm_framebuffer *fb)
+{
+ DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
+ kref_get(&fb->refcount);
+}
+EXPORT_SYMBOL(drm_framebuffer_reference);
+
+/**
+ * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
+ * @fb: fb to unregister
+ *
+ * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
+ * those used for fbdev. Note that the caller must hold a reference of it's own,
+ * i.e. the object may not be destroyed through this call (since it'll lead to a
+ * locking inversion).
+ */
+void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
+{
+ struct drm_device *dev = fb->dev;
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ /* Mark fb as reaped and drop idr ref. */
+ __drm_framebuffer_unregister(dev, fb);
+ mutex_unlock(&dev->mode_config.fb_lock);
+}
+EXPORT_SYMBOL(drm_framebuffer_unregister_private);
+
+/**
+ * drm_framebuffer_cleanup - remove a framebuffer object
+ * @fb: framebuffer to remove
+ *
+ * Cleanup framebuffer. This function is intended to be used from the drivers
+ * ->destroy callback. It can also be used to clean up driver private
+ * framebuffers embedded into a larger structure.
+ *
+ * Note that this function does not remove the fb from active usuage - if it is
+ * still used anywhere, hilarity can ensue since userspace could call getfb on
+ * the id and get back -EINVAL. Obviously no concern at driver unload time.
+ *
+ * Also, the framebuffer will not be removed from the lookup idr - for
+ * user-created framebuffers this will happen in in the rmfb ioctl. For
+ * driver-private objects (e.g. for fbdev) drivers need to explicitly call
+ * drm_framebuffer_unregister_private.
+ */
+void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
+{
+ struct drm_device *dev = fb->dev;
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ list_del(&fb->head);
+ dev->mode_config.num_fb--;
+ mutex_unlock(&dev->mode_config.fb_lock);
+}
+EXPORT_SYMBOL(drm_framebuffer_cleanup);
+
+/**
+ * drm_framebuffer_remove - remove and unreference a framebuffer object
+ * @fb: framebuffer to remove
+ *
+ * Scans all the CRTCs and planes in @dev's mode_config. If they're
+ * using @fb, removes it, setting it to NULL. Then drops the reference to the
+ * passed-in framebuffer. Might take the modeset locks.
+ *
+ * Note that this function optimizes the cleanup away if the caller holds the
+ * last reference to the framebuffer. It is also guaranteed to not take the
+ * modeset locks in this case.
+ */
+void drm_framebuffer_remove(struct drm_framebuffer *fb)
+{
+ struct drm_device *dev = fb->dev;
+ struct drm_crtc *crtc;
+ struct drm_plane *plane;
+ struct drm_mode_set set;
+ int ret;
+
+ WARN_ON(!list_empty(&fb->filp_head));
+
+ /*
+ * drm ABI mandates that we remove any deleted framebuffers from active
+ * useage. But since most sane clients only remove framebuffers they no
+ * longer need, try to optimize this away.
+ *
+ * Since we're holding a reference ourselves, observing a refcount of 1
+ * means that we're the last holder and can skip it. Also, the refcount
+ * can never increase from 1 again, so we don't need any barriers or
+ * locks.
+ *
+ * Note that userspace could try to race with use and instate a new
+ * usage _after_ we've cleared all current ones. End result will be an
+ * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
+ * in this manner.
+ */
+ if (atomic_read(&fb->refcount.refcount) > 1) {
+ drm_modeset_lock_all(dev);
+ /* remove from any CRTC */
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ if (crtc->primary->fb == fb) {
+ /* should turn off the crtc */
+ memset(&set, 0, sizeof(struct drm_mode_set));
+ set.crtc = crtc;
+ set.fb = NULL;
+ ret = drm_mode_set_config_internal(&set);
+ if (ret)
+ DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
+ }
+ }
+
+ list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
+ if (plane->fb == fb)
+ drm_plane_force_disable(plane);
+ }
+ drm_modeset_unlock_all(dev);
+ }
+
+ drm_framebuffer_unreference(fb);
+}
+EXPORT_SYMBOL(drm_framebuffer_remove);
+
+DEFINE_WW_CLASS(crtc_ww_class);
+
+/**
+ * drm_crtc_init_with_planes - Initialise a new CRTC object with
+ * specified primary and cursor planes.
+ * @dev: DRM device
+ * @crtc: CRTC object to init
+ * @primary: Primary plane for CRTC
+ * @cursor: Cursor plane for CRTC
+ * @funcs: callbacks for the new CRTC
+ *
+ * Inits a new object created as base part of a driver crtc object.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
+ struct drm_plane *primary,
+ struct drm_plane *cursor,
+ const struct drm_crtc_funcs *funcs)
+{
+ struct drm_mode_config *config = &dev->mode_config;
+ int ret;
+
+ WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
+ WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
+
+ crtc->dev = dev;
+ crtc->funcs = funcs;
+ crtc->invert_dimensions = false;
+
+ drm_modeset_lock_init(&crtc->mutex);
+ ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
+ if (ret)
+ return ret;
+
+ crtc->base.properties = &crtc->properties;
+
+ list_add_tail(&crtc->head, &config->crtc_list);
+ config->num_crtc++;
+
+ crtc->primary = primary;
+ crtc->cursor = cursor;
+ if (primary)
+ primary->possible_crtcs = 1 << drm_crtc_index(crtc);
+ if (cursor)
+ cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
+
+ if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
+ drm_object_attach_property(&crtc->base, config->prop_active, 0);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_crtc_init_with_planes);
+
+/**
+ * drm_crtc_cleanup - Clean up the core crtc usage
+ * @crtc: CRTC to cleanup
+ *
+ * This function cleans up @crtc and removes it from the DRM mode setting
+ * core. Note that the function does *not* free the crtc structure itself,
+ * this is the responsibility of the caller.
+ */
+void drm_crtc_cleanup(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+
+ kfree(crtc->gamma_store);
+ crtc->gamma_store = NULL;
+
+ drm_modeset_lock_fini(&crtc->mutex);
+
+ drm_mode_object_put(dev, &crtc->base);
+ list_del(&crtc->head);
+ dev->mode_config.num_crtc--;
+
+ WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
+ if (crtc->state && crtc->funcs->atomic_destroy_state)
+ crtc->funcs->atomic_destroy_state(crtc, crtc->state);
+
+ memset(crtc, 0, sizeof(*crtc));
+}
+EXPORT_SYMBOL(drm_crtc_cleanup);
+
+/**
+ * drm_crtc_index - find the index of a registered CRTC
+ * @crtc: CRTC to find index for
+ *
+ * Given a registered CRTC, return the index of that CRTC within a DRM
+ * device's list of CRTCs.
+ */
+unsigned int drm_crtc_index(struct drm_crtc *crtc)
+{
+ unsigned int index = 0;
+ struct drm_crtc *tmp;
+
+ list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
+ if (tmp == crtc)
+ return index;
+
+ index++;
+ }
+
+ BUG();
+}
+EXPORT_SYMBOL(drm_crtc_index);
+
+/*
+ * drm_mode_remove - remove and free a mode
+ * @connector: connector list to modify
+ * @mode: mode to remove
+ *
+ * Remove @mode from @connector's mode list, then free it.
+ */
+static void drm_mode_remove(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ list_del(&mode->head);
+ drm_mode_destroy(connector->dev, mode);
+}
+
+/**
+ * drm_display_info_set_bus_formats - set the supported bus formats
+ * @info: display info to store bus formats in
+ * @formats: array containing the supported bus formats
+ * @num_formats: the number of entries in the fmts array
+ *
+ * Store the supported bus formats in display info structure.
+ * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
+ * a full list of available formats.
+ */
+int drm_display_info_set_bus_formats(struct drm_display_info *info,
+ const u32 *formats,
+ unsigned int num_formats)
+{
+ u32 *fmts = NULL;
+
+ if (!formats && num_formats)
+ return -EINVAL;
+
+ if (formats && num_formats) {
+ fmts = kmemdup(formats, sizeof(*formats) * num_formats,
+ GFP_KERNEL);
+ if (!fmts)
+ return -ENOMEM;
+ }
+
+ kfree(info->bus_formats);
+ info->bus_formats = fmts;
+ info->num_bus_formats = num_formats;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_display_info_set_bus_formats);
+
+/**
+ * drm_connector_get_cmdline_mode - reads the user's cmdline mode
+ * @connector: connector to quwery
+ *
+ * The kernel supports per-connector configration of its consoles through
+ * use of the video= parameter. This function parses that option and
+ * extracts the user's specified mode (or enable/disable status) for a
+ * particular connector. This is typically only used during the early fbdev
+ * setup.
+ */
+static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
+{
+ struct drm_cmdline_mode *mode = &connector->cmdline_mode;
+ char *option = NULL;
+
+ if (fb_get_options(connector->name, &option))
+ return;
+
+ if (!drm_mode_parse_command_line_for_connector(option,
+ connector,
+ mode))
+ return;
+
+ if (mode->force) {
+ const char *s;
+
+ switch (mode->force) {
+ case DRM_FORCE_OFF:
+ s = "OFF";
+ break;
+ case DRM_FORCE_ON_DIGITAL:
+ s = "ON - dig";
+ break;
+ default:
+ case DRM_FORCE_ON:
+ s = "ON";
+ break;
+ }
+
+ DRM_INFO("forcing %s connector %s\n", connector->name, s);
+ connector->force = mode->force;
+ }
+
+ DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
+ connector->name,
+ mode->xres, mode->yres,
+ mode->refresh_specified ? mode->refresh : 60,
+ mode->rb ? " reduced blanking" : "",
+ mode->margins ? " with margins" : "",
+ mode->interlace ? " interlaced" : "");
+}
+
+/**
+ * drm_connector_init - Init a preallocated connector
+ * @dev: DRM device
+ * @connector: the connector to init
+ * @funcs: callbacks for this connector
+ * @connector_type: user visible type of the connector
+ *
+ * Initialises a preallocated connector. Connectors should be
+ * subclassed as part of driver connector objects.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_connector_init(struct drm_device *dev,
+ struct drm_connector *connector,
+ const struct drm_connector_funcs *funcs,
+ int connector_type)
+{
+ struct drm_mode_config *config = &dev->mode_config;
+ int ret;
+ struct ida *connector_ida =
+ &drm_connector_enum_list[connector_type].ida;
+
+ drm_modeset_lock_all(dev);
+
+ ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
+ if (ret)
+ goto out_unlock;
+
+ connector->base.properties = &connector->properties;
+ connector->dev = dev;
+ connector->funcs = funcs;
+ connector->connector_type = connector_type;
+ connector->connector_type_id =
+ ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
+ if (connector->connector_type_id < 0) {
+ ret = connector->connector_type_id;
+ goto out_put;
+ }
+ connector->name =
+ kasprintf(GFP_KERNEL, "%s-%d",
+ drm_connector_enum_list[connector_type].name,
+ connector->connector_type_id);
+ if (!connector->name) {
+ ret = -ENOMEM;
+ goto out_put;
+ }
+
+ INIT_LIST_HEAD(&connector->probed_modes);
+ INIT_LIST_HEAD(&connector->modes);
+ connector->edid_blob_ptr = NULL;
+ connector->status = connector_status_unknown;
+
+ drm_connector_get_cmdline_mode(connector);
+
+ /* We should add connectors at the end to avoid upsetting the connector
+ * index too much. */
+ list_add_tail(&connector->head, &config->connector_list);
+ config->num_connector++;
+
+ if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
+ drm_object_attach_property(&connector->base,
+ config->edid_property,
+ 0);
+
+ drm_object_attach_property(&connector->base,
+ config->dpms_property, 0);
+
+ if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
+ drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
+ }
+
+ connector->debugfs_entry = NULL;
+
+out_put:
+ if (ret)
+ drm_mode_object_put(dev, &connector->base);
+
+out_unlock:
+ drm_modeset_unlock_all(dev);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_connector_init);
+
+/**
+ * drm_connector_cleanup - cleans up an initialised connector
+ * @connector: connector to cleanup
+ *
+ * Cleans up the connector but doesn't free the object.
+ */
+void drm_connector_cleanup(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+ struct drm_display_mode *mode, *t;
+
+ if (connector->tile_group) {
+ drm_mode_put_tile_group(dev, connector->tile_group);
+ connector->tile_group = NULL;
+ }
+
+ list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
+ drm_mode_remove(connector, mode);
+
+ list_for_each_entry_safe(mode, t, &connector->modes, head)
+ drm_mode_remove(connector, mode);
+
+ ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
+ connector->connector_type_id);
+
+ kfree(connector->display_info.bus_formats);
+ drm_mode_object_put(dev, &connector->base);
+ kfree(connector->name);
+ connector->name = NULL;
+ list_del(&connector->head);
+ dev->mode_config.num_connector--;
+
+ WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
+ if (connector->state && connector->funcs->atomic_destroy_state)
+ connector->funcs->atomic_destroy_state(connector,
+ connector->state);
+
+ memset(connector, 0, sizeof(*connector));
+}
+EXPORT_SYMBOL(drm_connector_cleanup);
+
+/**
+ * drm_connector_index - find the index of a registered connector
+ * @connector: connector to find index for
+ *
+ * Given a registered connector, return the index of that connector within a DRM
+ * device's list of connectors.
+ */
+unsigned int drm_connector_index(struct drm_connector *connector)
+{
+ unsigned int index = 0;
+ struct drm_connector *tmp;
+ struct drm_mode_config *config = &connector->dev->mode_config;
+
+ WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
+
+ list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) {
+ if (tmp == connector)
+ return index;
+
+ index++;
+ }
+
+ BUG();
+}
+EXPORT_SYMBOL(drm_connector_index);
+
+/**
+ * drm_connector_register - register a connector
+ * @connector: the connector to register
+ *
+ * Register userspace interfaces for a connector
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_connector_register(struct drm_connector *connector)
+{
+ int ret;
+
+ drm_mode_object_register(connector->dev, &connector->base);
+
+ ret = drm_sysfs_connector_add(connector);
+ if (ret)
+ return ret;
+
+ ret = drm_debugfs_connector_add(connector);
+ if (ret) {
+ drm_sysfs_connector_remove(connector);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_connector_register);
+
+/**
+ * drm_connector_unregister - unregister a connector
+ * @connector: the connector to unregister
+ *
+ * Unregister userspace interfaces for a connector
+ */
+void drm_connector_unregister(struct drm_connector *connector)
+{
+ drm_sysfs_connector_remove(connector);
+ drm_debugfs_connector_remove(connector);
+}
+EXPORT_SYMBOL(drm_connector_unregister);
+
+
+/**
+ * drm_connector_unplug_all - unregister connector userspace interfaces
+ * @dev: drm device
+ *
+ * This function unregisters all connector userspace interfaces in sysfs. Should
+ * be call when the device is disconnected, e.g. from an usb driver's
+ * ->disconnect callback.
+ */
+void drm_connector_unplug_all(struct drm_device *dev)
+{
+ struct drm_connector *connector;
+
+ /* taking the mode config mutex ends up in a clash with sysfs */
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ drm_connector_unregister(connector);
+
+}
+EXPORT_SYMBOL(drm_connector_unplug_all);
+
+/**
+ * drm_encoder_init - Init a preallocated encoder
+ * @dev: drm device
+ * @encoder: the encoder to init
+ * @funcs: callbacks for this encoder
+ * @encoder_type: user visible type of the encoder
+ *
+ * Initialises a preallocated encoder. Encoder should be
+ * subclassed as part of driver encoder objects.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_encoder_init(struct drm_device *dev,
+ struct drm_encoder *encoder,
+ const struct drm_encoder_funcs *funcs,
+ int encoder_type)
+{
+ int ret;
+
+ drm_modeset_lock_all(dev);
+
+ ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
+ if (ret)
+ goto out_unlock;
+
+ encoder->dev = dev;
+ encoder->encoder_type = encoder_type;
+ encoder->funcs = funcs;
+ encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
+ drm_encoder_enum_list[encoder_type].name,
+ encoder->base.id);
+ if (!encoder->name) {
+ ret = -ENOMEM;
+ goto out_put;
+ }
+
+ list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
+ dev->mode_config.num_encoder++;
+
+out_put:
+ if (ret)
+ drm_mode_object_put(dev, &encoder->base);
+
+out_unlock:
+ drm_modeset_unlock_all(dev);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_encoder_init);
+
+/**
+ * drm_encoder_cleanup - cleans up an initialised encoder
+ * @encoder: encoder to cleanup
+ *
+ * Cleans up the encoder but doesn't free the object.
+ */
+void drm_encoder_cleanup(struct drm_encoder *encoder)
+{
+ struct drm_device *dev = encoder->dev;
+
+ drm_modeset_lock_all(dev);
+ drm_mode_object_put(dev, &encoder->base);
+ kfree(encoder->name);
+ list_del(&encoder->head);
+ dev->mode_config.num_encoder--;
+ drm_modeset_unlock_all(dev);
+
+ memset(encoder, 0, sizeof(*encoder));
+}
+EXPORT_SYMBOL(drm_encoder_cleanup);
+
+/**
+ * drm_universal_plane_init - Initialize a new universal plane object
+ * @dev: DRM device
+ * @plane: plane object to init
+ * @possible_crtcs: bitmask of possible CRTCs
+ * @funcs: callbacks for the new plane
+ * @formats: array of supported formats (%DRM_FORMAT_*)
+ * @format_count: number of elements in @formats
+ * @type: type of plane (overlay, primary, cursor)
+ *
+ * Initializes a plane object of type @type.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
+ unsigned long possible_crtcs,
+ const struct drm_plane_funcs *funcs,
+ const uint32_t *formats, uint32_t format_count,
+ enum drm_plane_type type)
+{
+ struct drm_mode_config *config = &dev->mode_config;
+ int ret;
+
+ ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
+ if (ret)
+ return ret;
+
+ drm_modeset_lock_init(&plane->mutex);
+
+ plane->base.properties = &plane->properties;
+ plane->dev = dev;
+ plane->funcs = funcs;
+ plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
+ GFP_KERNEL);
+ if (!plane->format_types) {
+ DRM_DEBUG_KMS("out of memory when allocating plane\n");
+ drm_mode_object_put(dev, &plane->base);
+ return -ENOMEM;
+ }
+
+ memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
+ plane->format_count = format_count;
+ plane->possible_crtcs = possible_crtcs;
+ plane->type = type;
+
+ list_add_tail(&plane->head, &config->plane_list);
+ config->num_total_plane++;
+ if (plane->type == DRM_PLANE_TYPE_OVERLAY)
+ config->num_overlay_plane++;
+
+ drm_object_attach_property(&plane->base,
+ config->plane_type_property,
+ plane->type);
+
+ if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
+ drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
+ drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
+ drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
+ drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
+ drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
+ drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
+ drm_object_attach_property(&plane->base, config->prop_src_x, 0);
+ drm_object_attach_property(&plane->base, config->prop_src_y, 0);
+ drm_object_attach_property(&plane->base, config->prop_src_w, 0);
+ drm_object_attach_property(&plane->base, config->prop_src_h, 0);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_universal_plane_init);
+
+/**
+ * drm_plane_init - Initialize a legacy plane
+ * @dev: DRM device
+ * @plane: plane object to init
+ * @possible_crtcs: bitmask of possible CRTCs
+ * @funcs: callbacks for the new plane
+ * @formats: array of supported formats (%DRM_FORMAT_*)
+ * @format_count: number of elements in @formats
+ * @is_primary: plane type (primary vs overlay)
+ *
+ * Legacy API to initialize a DRM plane.
+ *
+ * New drivers should call drm_universal_plane_init() instead.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
+ unsigned long possible_crtcs,
+ const struct drm_plane_funcs *funcs,
+ const uint32_t *formats, uint32_t format_count,
+ bool is_primary)
+{
+ enum drm_plane_type type;
+
+ type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
+ return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
+ formats, format_count, type);
+}
+EXPORT_SYMBOL(drm_plane_init);
+
+/**
+ * drm_plane_cleanup - Clean up the core plane usage
+ * @plane: plane to cleanup
+ *
+ * This function cleans up @plane and removes it from the DRM mode setting
+ * core. Note that the function does *not* free the plane structure itself,
+ * this is the responsibility of the caller.
+ */
+void drm_plane_cleanup(struct drm_plane *plane)
+{
+ struct drm_device *dev = plane->dev;
+
+ drm_modeset_lock_all(dev);
+ kfree(plane->format_types);
+ drm_mode_object_put(dev, &plane->base);
+
+ BUG_ON(list_empty(&plane->head));
+
+ list_del(&plane->head);
+ dev->mode_config.num_total_plane--;
+ if (plane->type == DRM_PLANE_TYPE_OVERLAY)
+ dev->mode_config.num_overlay_plane--;
+ drm_modeset_unlock_all(dev);
+
+ WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
+ if (plane->state && plane->funcs->atomic_destroy_state)
+ plane->funcs->atomic_destroy_state(plane, plane->state);
+
+ memset(plane, 0, sizeof(*plane));
+}
+EXPORT_SYMBOL(drm_plane_cleanup);
+
+/**
+ * drm_plane_index - find the index of a registered plane
+ * @plane: plane to find index for
+ *
+ * Given a registered plane, return the index of that CRTC within a DRM
+ * device's list of planes.
+ */
+unsigned int drm_plane_index(struct drm_plane *plane)
+{
+ unsigned int index = 0;
+ struct drm_plane *tmp;
+
+ list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) {
+ if (tmp == plane)
+ return index;
+
+ index++;
+ }
+
+ BUG();
+}
+EXPORT_SYMBOL(drm_plane_index);
+
+/**
+ * drm_plane_force_disable - Forcibly disable a plane
+ * @plane: plane to disable
+ *
+ * Forces the plane to be disabled.
+ *
+ * Used when the plane's current framebuffer is destroyed,
+ * and when restoring fbdev mode.
+ */
+void drm_plane_force_disable(struct drm_plane *plane)
+{
+ int ret;
+
+ if (!plane->fb)
+ return;
+
+ plane->old_fb = plane->fb;
+ ret = plane->funcs->disable_plane(plane);
+ if (ret) {
+ DRM_ERROR("failed to disable plane with busy fb\n");
+ plane->old_fb = NULL;
+ return;
+ }
+ /* disconnect the plane from the fb and crtc: */
+ drm_framebuffer_unreference(plane->old_fb);
+ plane->old_fb = NULL;
+ plane->fb = NULL;
+ plane->crtc = NULL;
+}
+EXPORT_SYMBOL(drm_plane_force_disable);
+
+static int drm_mode_create_standard_properties(struct drm_device *dev)
+{
+ struct drm_property *prop;
+
+ /*
+ * Standard properties (apply to all connectors)
+ */
+ prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
+ DRM_MODE_PROP_IMMUTABLE,
+ "EDID", 0);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.edid_property = prop;
+
+ prop = drm_property_create_enum(dev, 0,
+ "DPMS", drm_dpms_enum_list,
+ ARRAY_SIZE(drm_dpms_enum_list));
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.dpms_property = prop;
+
+ prop = drm_property_create(dev,
+ DRM_MODE_PROP_BLOB |
+ DRM_MODE_PROP_IMMUTABLE,
+ "PATH", 0);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.path_property = prop;
+
+ prop = drm_property_create(dev,
+ DRM_MODE_PROP_BLOB |
+ DRM_MODE_PROP_IMMUTABLE,
+ "TILE", 0);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.tile_property = prop;
+
+ prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
+ "type", drm_plane_type_enum_list,
+ ARRAY_SIZE(drm_plane_type_enum_list));
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.plane_type_property = prop;
+
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "SRC_X", 0, UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_src_x = prop;
+
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "SRC_Y", 0, UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_src_y = prop;
+
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "SRC_W", 0, UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_src_w = prop;
+
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "SRC_H", 0, UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_src_h = prop;
+
+ prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
+ "CRTC_X", INT_MIN, INT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_crtc_x = prop;
+
+ prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
+ "CRTC_Y", INT_MIN, INT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_crtc_y = prop;
+
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "CRTC_W", 0, INT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_crtc_w = prop;
+
+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
+ "CRTC_H", 0, INT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_crtc_h = prop;
+
+ prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
+ "FB_ID", DRM_MODE_OBJECT_FB);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_fb_id = prop;
+
+ prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
+ "CRTC_ID", DRM_MODE_OBJECT_CRTC);
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_crtc_id = prop;
+
+ prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
+ "ACTIVE");
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.prop_active = prop;
+
+ return 0;
+}
+
+/**
+ * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
+ * @dev: DRM device
+ *
+ * Called by a driver the first time a DVI-I connector is made.
+ */
+int drm_mode_create_dvi_i_properties(struct drm_device *dev)
+{
+ struct drm_property *dvi_i_selector;
+ struct drm_property *dvi_i_subconnector;
+
+ if (dev->mode_config.dvi_i_select_subconnector_property)
+ return 0;
+
+ dvi_i_selector =
+ drm_property_create_enum(dev, 0,
+ "select subconnector",
+ drm_dvi_i_select_enum_list,
+ ARRAY_SIZE(drm_dvi_i_select_enum_list));
+ dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
+
+ dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
+ "subconnector",
+ drm_dvi_i_subconnector_enum_list,
+ ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
+ dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
+
+/**
+ * drm_create_tv_properties - create TV specific connector properties
+ * @dev: DRM device
+ * @num_modes: number of different TV formats (modes) supported
+ * @modes: array of pointers to strings containing name of each format
+ *
+ * Called by a driver's TV initialization routine, this function creates
+ * the TV specific connector properties for a given device. Caller is
+ * responsible for allocating a list of format names and passing them to
+ * this routine.
+ */
+int drm_mode_create_tv_properties(struct drm_device *dev,
+ unsigned int num_modes,
+ char *modes[])
+{
+ struct drm_property *tv_selector;
+ struct drm_property *tv_subconnector;
+ unsigned int i;
+
+ if (dev->mode_config.tv_select_subconnector_property)
+ return 0;
+
+ /*
+ * Basic connector properties
+ */
+ tv_selector = drm_property_create_enum(dev, 0,
+ "select subconnector",
+ drm_tv_select_enum_list,
+ ARRAY_SIZE(drm_tv_select_enum_list));
+ dev->mode_config.tv_select_subconnector_property = tv_selector;
+
+ tv_subconnector =
+ drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
+ "subconnector",
+ drm_tv_subconnector_enum_list,
+ ARRAY_SIZE(drm_tv_subconnector_enum_list));
+ dev->mode_config.tv_subconnector_property = tv_subconnector;
+
+ /*
+ * Other, TV specific properties: margins & TV modes.
+ */
+ dev->mode_config.tv_left_margin_property =
+ drm_property_create_range(dev, 0, "left margin", 0, 100);
+
+ dev->mode_config.tv_right_margin_property =
+ drm_property_create_range(dev, 0, "right margin", 0, 100);
+
+ dev->mode_config.tv_top_margin_property =
+ drm_property_create_range(dev, 0, "top margin", 0, 100);
+
+ dev->mode_config.tv_bottom_margin_property =
+ drm_property_create_range(dev, 0, "bottom margin", 0, 100);
+
+ dev->mode_config.tv_mode_property =
+ drm_property_create(dev, DRM_MODE_PROP_ENUM,
+ "mode", num_modes);
+ for (i = 0; i < num_modes; i++)
+ drm_property_add_enum(dev->mode_config.tv_mode_property, i,
+ i, modes[i]);
+
+ dev->mode_config.tv_brightness_property =
+ drm_property_create_range(dev, 0, "brightness", 0, 100);
+
+ dev->mode_config.tv_contrast_property =
+ drm_property_create_range(dev, 0, "contrast", 0, 100);
+
+ dev->mode_config.tv_flicker_reduction_property =
+ drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
+
+ dev->mode_config.tv_overscan_property =
+ drm_property_create_range(dev, 0, "overscan", 0, 100);
+
+ dev->mode_config.tv_saturation_property =
+ drm_property_create_range(dev, 0, "saturation", 0, 100);
+
+ dev->mode_config.tv_hue_property =
+ drm_property_create_range(dev, 0, "hue", 0, 100);
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_tv_properties);
+
+/**
+ * drm_mode_create_scaling_mode_property - create scaling mode property
+ * @dev: DRM device
+ *
+ * Called by a driver the first time it's needed, must be attached to desired
+ * connectors.
+ */
+int drm_mode_create_scaling_mode_property(struct drm_device *dev)
+{
+ struct drm_property *scaling_mode;
+
+ if (dev->mode_config.scaling_mode_property)
+ return 0;
+
+ scaling_mode =
+ drm_property_create_enum(dev, 0, "scaling mode",
+ drm_scaling_mode_enum_list,
+ ARRAY_SIZE(drm_scaling_mode_enum_list));
+
+ dev->mode_config.scaling_mode_property = scaling_mode;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
+
+/**
+ * drm_mode_create_aspect_ratio_property - create aspect ratio property
+ * @dev: DRM device
+ *
+ * Called by a driver the first time it's needed, must be attached to desired
+ * connectors.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
+{
+ if (dev->mode_config.aspect_ratio_property)
+ return 0;
+
+ dev->mode_config.aspect_ratio_property =
+ drm_property_create_enum(dev, 0, "aspect ratio",
+ drm_aspect_ratio_enum_list,
+ ARRAY_SIZE(drm_aspect_ratio_enum_list));
+
+ if (dev->mode_config.aspect_ratio_property == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
+
+/**
+ * drm_mode_create_dirty_property - create dirty property
+ * @dev: DRM device
+ *
+ * Called by a driver the first time it's needed, must be attached to desired
+ * connectors.
+ */
+int drm_mode_create_dirty_info_property(struct drm_device *dev)
+{
+ struct drm_property *dirty_info;
+
+ if (dev->mode_config.dirty_info_property)
+ return 0;
+
+ dirty_info =
+ drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
+ "dirty",
+ drm_dirty_info_enum_list,
+ ARRAY_SIZE(drm_dirty_info_enum_list));
+ dev->mode_config.dirty_info_property = dirty_info;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
+
+/**
+ * drm_mode_create_suggested_offset_properties - create suggests offset properties
+ * @dev: DRM device
+ *
+ * Create the the suggested x/y offset property for connectors.
+ */
+int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
+{
+ if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
+ return 0;
+
+ dev->mode_config.suggested_x_property =
+ drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
+
+ dev->mode_config.suggested_y_property =
+ drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
+
+ if (dev->mode_config.suggested_x_property == NULL ||
+ dev->mode_config.suggested_y_property == NULL)
+ return -ENOMEM;
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
+
+static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
+{
+ uint32_t total_objects = 0;
+
+ total_objects += dev->mode_config.num_crtc;
+ total_objects += dev->mode_config.num_connector;
+ total_objects += dev->mode_config.num_encoder;
+
+ group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL);
+ if (!group->id_list)
+ return -ENOMEM;
+
+ group->num_crtcs = 0;
+ group->num_connectors = 0;
+ group->num_encoders = 0;
+ return 0;
+}
+
+void drm_mode_group_destroy(struct drm_mode_group *group)
+{
+ kfree(group->id_list);
+ group->id_list = NULL;
+}
+
+/*
+ * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is
+ * the drm core's responsibility to set up mode control groups.
+ */
+int drm_mode_group_init_legacy_group(struct drm_device *dev,
+ struct drm_mode_group *group)
+{
+ struct drm_crtc *crtc;
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+ int ret;
+
+ ret = drm_mode_group_init(dev, group);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+ group->id_list[group->num_crtcs++] = crtc->base.id;
+
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
+ group->id_list[group->num_crtcs + group->num_encoders++] =
+ encoder->base.id;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ group->id_list[group->num_crtcs + group->num_encoders +
+ group->num_connectors++] = connector->base.id;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
+
+void drm_reinit_primary_mode_group(struct drm_device *dev)
+{
+ drm_modeset_lock_all(dev);
+ drm_mode_group_destroy(&dev->primary->mode_group);
+ drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
+ drm_modeset_unlock_all(dev);
+}
+EXPORT_SYMBOL(drm_reinit_primary_mode_group);
+
+/**
+ * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
+ * @out: drm_mode_modeinfo struct to return to the user
+ * @in: drm_display_mode to use
+ *
+ * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
+ * the user.
+ */
+static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
+ const struct drm_display_mode *in)
+{
+ WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
+ in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
+ in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
+ in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
+ in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
+ "timing values too large for mode info\n");
+
+ out->clock = in->clock;
+ out->hdisplay = in->hdisplay;
+ out->hsync_start = in->hsync_start;
+ out->hsync_end = in->hsync_end;
+ out->htotal = in->htotal;
+ out->hskew = in->hskew;
+ out->vdisplay = in->vdisplay;
+ out->vsync_start = in->vsync_start;
+ out->vsync_end = in->vsync_end;
+ out->vtotal = in->vtotal;
+ out->vscan = in->vscan;
+ out->vrefresh = in->vrefresh;
+ out->flags = in->flags;
+ out->type = in->type;
+ strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
+ out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+}
+
+/**
+ * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
+ * @out: drm_display_mode to return to the user
+ * @in: drm_mode_modeinfo to use
+ *
+ * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
+ * the caller.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+static int drm_crtc_convert_umode(struct drm_display_mode *out,
+ const struct drm_mode_modeinfo *in)
+{
+ if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
+ return -ERANGE;
+
+ if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
+ return -EINVAL;
+
+ out->clock = in->clock;
+ out->hdisplay = in->hdisplay;
+ out->hsync_start = in->hsync_start;
+ out->hsync_end = in->hsync_end;
+ out->htotal = in->htotal;
+ out->hskew = in->hskew;
+ out->vdisplay = in->vdisplay;
+ out->vsync_start = in->vsync_start;
+ out->vsync_end = in->vsync_end;
+ out->vtotal = in->vtotal;
+ out->vscan = in->vscan;
+ out->vrefresh = in->vrefresh;
+ out->flags = in->flags;
+ out->type = in->type;
+ strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
+ out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+
+ return 0;
+}
+
+/**
+ * drm_mode_getresources - get graphics configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Construct a set of configuration description structures and return
+ * them to the user, including CRTC, connector and framebuffer configuration.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getresources(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_card_res *card_res = data;
+ struct list_head *lh;
+ struct drm_framebuffer *fb;
+ struct drm_connector *connector;
+ struct drm_crtc *crtc;
+ struct drm_encoder *encoder;
+ int ret = 0;
+ int connector_count = 0;
+ int crtc_count = 0;
+ int fb_count = 0;
+ int encoder_count = 0;
+ int copied = 0, i;
+ uint32_t __user *fb_id;
+ uint32_t __user *crtc_id;
+ uint32_t __user *connector_id;
+ uint32_t __user *encoder_id;
+ struct drm_mode_group *mode_group;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+
+ mutex_lock(&file_priv->fbs_lock);
+ /*
+ * For the non-control nodes we need to limit the list of resources
+ * by IDs in the group list for this node
+ */
+ list_for_each(lh, &file_priv->fbs)
+ fb_count++;
+
+ /* handle this in 4 parts */
+ /* FBs */
+ if (card_res->count_fbs >= fb_count) {
+ copied = 0;
+ fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
+ list_for_each_entry(fb, &file_priv->fbs, filp_head) {
+ if (put_user(fb->base.id, fb_id + copied)) {
+ mutex_unlock(&file_priv->fbs_lock);
+ return -EFAULT;
+ }
+ copied++;
+ }
+ }
+ card_res->count_fbs = fb_count;
+ mutex_unlock(&file_priv->fbs_lock);
+
+ /* mode_config.mutex protects the connector list against e.g. DP MST
+ * connector hot-adding. CRTC/Plane lists are invariant. */
+ mutex_lock(&dev->mode_config.mutex);
+ if (!drm_is_primary_client(file_priv)) {
+
+ mode_group = NULL;
+ list_for_each(lh, &dev->mode_config.crtc_list)
+ crtc_count++;
+
+ list_for_each(lh, &dev->mode_config.connector_list)
+ connector_count++;
+
+ list_for_each(lh, &dev->mode_config.encoder_list)
+ encoder_count++;
+ } else {
+
+ mode_group = &file_priv->master->minor->mode_group;
+ crtc_count = mode_group->num_crtcs;
+ connector_count = mode_group->num_connectors;
+ encoder_count = mode_group->num_encoders;
+ }
+
+ card_res->max_height = dev->mode_config.max_height;
+ card_res->min_height = dev->mode_config.min_height;
+ card_res->max_width = dev->mode_config.max_width;
+ card_res->min_width = dev->mode_config.min_width;
+
+ /* CRTCs */
+ if (card_res->count_crtcs >= crtc_count) {
+ copied = 0;
+ crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
+ if (!mode_group) {
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list,
+ head) {
+ DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
+ if (put_user(crtc->base.id, crtc_id + copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ } else {
+ for (i = 0; i < mode_group->num_crtcs; i++) {
+ if (put_user(mode_group->id_list[i],
+ crtc_id + copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ }
+ }
+ card_res->count_crtcs = crtc_count;
+
+ /* Encoders */
+ if (card_res->count_encoders >= encoder_count) {
+ copied = 0;
+ encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
+ if (!mode_group) {
+ list_for_each_entry(encoder,
+ &dev->mode_config.encoder_list,
+ head) {
+ DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
+ encoder->name);
+ if (put_user(encoder->base.id, encoder_id +
+ copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ } else {
+ for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
+ if (put_user(mode_group->id_list[i],
+ encoder_id + copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+
+ }
+ }
+ card_res->count_encoders = encoder_count;
+
+ /* Connectors */
+ if (card_res->count_connectors >= connector_count) {
+ copied = 0;
+ connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
+ if (!mode_group) {
+ list_for_each_entry(connector,
+ &dev->mode_config.connector_list,
+ head) {
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+ connector->base.id,
+ connector->name);
+ if (put_user(connector->base.id,
+ connector_id + copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ } else {
+ int start = mode_group->num_crtcs +
+ mode_group->num_encoders;
+ for (i = start; i < start + mode_group->num_connectors; i++) {
+ if (put_user(mode_group->id_list[i],
+ connector_id + copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ }
+ }
+ card_res->count_connectors = connector_count;
+
+ DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
+ card_res->count_connectors, card_res->count_encoders);
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_mode_getcrtc - get CRTC configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Construct a CRTC configuration structure to return to the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getcrtc(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_crtc *crtc_resp = data;
+ struct drm_crtc *crtc;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
+ if (!crtc)
+ return -ENOENT;
+
+ drm_modeset_lock_crtc(crtc, crtc->primary);
+ crtc_resp->gamma_size = crtc->gamma_size;
+ if (crtc->primary->fb)
+ crtc_resp->fb_id = crtc->primary->fb->base.id;
+ else
+ crtc_resp->fb_id = 0;
+
+ if (crtc->state) {
+ crtc_resp->x = crtc->primary->state->src_x >> 16;
+ crtc_resp->y = crtc->primary->state->src_y >> 16;
+ if (crtc->state->enable) {
+ drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
+ crtc_resp->mode_valid = 1;
+
+ } else {
+ crtc_resp->mode_valid = 0;
+ }
+ } else {
+ crtc_resp->x = crtc->x;
+ crtc_resp->y = crtc->y;
+ if (crtc->enabled) {
+ drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
+ crtc_resp->mode_valid = 1;
+
+ } else {
+ crtc_resp->mode_valid = 0;
+ }
+ }
+ drm_modeset_unlock_crtc(crtc);
+
+ return 0;
+}
+
+static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
+ const struct drm_file *file_priv)
+{
+ /*
+ * If user-space hasn't configured the driver to expose the stereo 3D
+ * modes, don't expose them.
+ */
+ if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
+ return false;
+
+ return true;
+}
+
+static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
+{
+ /* For atomic drivers only state objects are synchronously updated and
+ * protected by modeset locks, so check those first. */
+ if (connector->state)
+ return connector->state->best_encoder;
+ return connector->encoder;
+}
+
+/* helper for getconnector and getproperties ioctls */
+static int get_properties(struct drm_mode_object *obj, bool atomic,
+ uint32_t __user *prop_ptr, uint64_t __user *prop_values,
+ uint32_t *arg_count_props)
+{
+ int props_count;
+ int i, ret, copied;
+
+ props_count = obj->properties->count;
+ if (!atomic)
+ props_count -= obj->properties->atomic_count;
+
+ if ((*arg_count_props >= props_count) && props_count) {
+ for (i = 0, copied = 0; copied < props_count; i++) {
+ struct drm_property *prop = obj->properties->properties[i];
+ uint64_t val;
+
+ if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
+ continue;
+
+ ret = drm_object_property_get_value(obj, prop, &val);
+ if (ret)
+ return ret;
+
+ if (put_user(prop->base.id, prop_ptr + copied))
+ return -EFAULT;
+
+ if (put_user(val, prop_values + copied))
+ return -EFAULT;
+
+ copied++;
+ }
+ }
+ *arg_count_props = props_count;
+
+ return 0;
+}
+
+/**
+ * drm_mode_getconnector - get connector configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Construct a connector configuration structure to return to the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getconnector(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_get_connector *out_resp = data;
+ struct drm_connector *connector;
+ struct drm_encoder *encoder;
+ struct drm_display_mode *mode;
+ int mode_count = 0;
+ int encoders_count = 0;
+ int ret = 0;
+ int copied = 0;
+ int i;
+ struct drm_mode_modeinfo u_mode;
+ struct drm_mode_modeinfo __user *mode_ptr;
+ uint32_t __user *encoder_ptr;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
+
+ DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
+
+ mutex_lock(&dev->mode_config.mutex);
+
+ connector = drm_connector_find(dev, out_resp->connector_id);
+ if (!connector) {
+ ret = -ENOENT;
+ goto out_unlock;
+ }
+
+ for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
+ if (connector->encoder_ids[i] != 0)
+ encoders_count++;
+
+ if (out_resp->count_modes == 0) {
+ connector->funcs->fill_modes(connector,
+ dev->mode_config.max_width,
+ dev->mode_config.max_height);
+ }
+
+ /* delayed so we get modes regardless of pre-fill_modes state */
+ list_for_each_entry(mode, &connector->modes, head)
+ if (drm_mode_expose_to_userspace(mode, file_priv))
+ mode_count++;
+
+ out_resp->connector_id = connector->base.id;
+ out_resp->connector_type = connector->connector_type;
+ out_resp->connector_type_id = connector->connector_type_id;
+ out_resp->mm_width = connector->display_info.width_mm;
+ out_resp->mm_height = connector->display_info.height_mm;
+ out_resp->subpixel = connector->display_info.subpixel_order;
+ out_resp->connection = connector->status;
+
+ drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
+ encoder = drm_connector_get_encoder(connector);
+ if (encoder)
+ out_resp->encoder_id = encoder->base.id;
+ else
+ out_resp->encoder_id = 0;
+
+ /*
+ * This ioctl is called twice, once to determine how much space is
+ * needed, and the 2nd time to fill it.
+ */
+ if ((out_resp->count_modes >= mode_count) && mode_count) {
+ copied = 0;
+ mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
+ list_for_each_entry(mode, &connector->modes, head) {
+ if (!drm_mode_expose_to_userspace(mode, file_priv))
+ continue;
+
+ drm_crtc_convert_to_umode(&u_mode, mode);
+ if (copy_to_user(mode_ptr + copied,
+ &u_mode, sizeof(u_mode))) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ }
+ out_resp->count_modes = mode_count;
+
+ ret = get_properties(&connector->base, file_priv->atomic,
+ (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
+ (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
+ &out_resp->count_props);
+ if (ret)
+ goto out;
+
+ if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
+ copied = 0;
+ encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
+ for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
+ if (connector->encoder_ids[i] != 0) {
+ if (put_user(connector->encoder_ids[i],
+ encoder_ptr + copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ }
+ }
+ out_resp->count_encoders = encoders_count;
+
+out:
+ drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+out_unlock:
+ mutex_unlock(&dev->mode_config.mutex);
+
+ return ret;
+}
+
+static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
+{
+ struct drm_connector *connector;
+ struct drm_device *dev = encoder->dev;
+ bool uses_atomic = false;
+
+ /* For atomic drivers only state objects are synchronously updated and
+ * protected by modeset locks, so check those first. */
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ if (!connector->state)
+ continue;
+
+ uses_atomic = true;
+
+ if (connector->state->best_encoder != encoder)
+ continue;
+
+ return connector->state->crtc;
+ }
+
+ /* Don't return stale data (e.g. pending async disable). */
+ if (uses_atomic)
+ return NULL;
+
+ return encoder->crtc;
+}
+
+/**
+ * drm_mode_getencoder - get encoder configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Construct a encoder configuration structure to return to the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getencoder(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_get_encoder *enc_resp = data;
+ struct drm_encoder *encoder;
+ struct drm_crtc *crtc;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ encoder = drm_encoder_find(dev, enc_resp->encoder_id);
+ if (!encoder)
+ return -ENOENT;
+
+ drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
+ crtc = drm_encoder_get_crtc(encoder);
+ if (crtc)
+ enc_resp->crtc_id = crtc->base.id;
+ else
+ enc_resp->crtc_id = 0;
+ drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+ enc_resp->encoder_type = encoder->encoder_type;
+ enc_resp->encoder_id = encoder->base.id;
+ enc_resp->possible_crtcs = encoder->possible_crtcs;
+ enc_resp->possible_clones = encoder->possible_clones;
+
+ return 0;
+}
+
+/**
+ * drm_mode_getplane_res - enumerate all plane resources
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * Construct a list of plane ids to return to the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getplane_res(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_get_plane_res *plane_resp = data;
+ struct drm_mode_config *config;
+ struct drm_plane *plane;
+ uint32_t __user *plane_ptr;
+ int copied = 0;
+ unsigned num_planes;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ config = &dev->mode_config;
+
+ if (file_priv->universal_planes)
+ num_planes = config->num_total_plane;
+ else
+ num_planes = config->num_overlay_plane;
+
+ /*
+ * This ioctl is called twice, once to determine how much space is
+ * needed, and the 2nd time to fill it.
+ */
+ if (num_planes &&
+ (plane_resp->count_planes >= num_planes)) {
+ plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
+
+ /* Plane lists are invariant, no locking needed. */
+ list_for_each_entry(plane, &config->plane_list, head) {
+ /*
+ * Unless userspace set the 'universal planes'
+ * capability bit, only advertise overlays.
+ */
+ if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
+ !file_priv->universal_planes)
+ continue;
+
+ if (put_user(plane->base.id, plane_ptr + copied))
+ return -EFAULT;
+ copied++;
+ }
+ }
+ plane_resp->count_planes = num_planes;
+
+ return 0;
+}
+
+/**
+ * drm_mode_getplane - get plane configuration
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * Construct a plane configuration structure to return to the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getplane(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_get_plane *plane_resp = data;
+ struct drm_plane *plane;
+ uint32_t __user *format_ptr;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ plane = drm_plane_find(dev, plane_resp->plane_id);
+ if (!plane)
+ return -ENOENT;
+
+ drm_modeset_lock(&plane->mutex, NULL);
+ if (plane->crtc)
+ plane_resp->crtc_id = plane->crtc->base.id;
+ else
+ plane_resp->crtc_id = 0;
+
+ if (plane->fb)
+ plane_resp->fb_id = plane->fb->base.id;
+ else
+ plane_resp->fb_id = 0;
+ drm_modeset_unlock(&plane->mutex);
+
+ plane_resp->plane_id = plane->base.id;
+ plane_resp->possible_crtcs = plane->possible_crtcs;
+ plane_resp->gamma_size = 0;
+
+ /*
+ * This ioctl is called twice, once to determine how much space is
+ * needed, and the 2nd time to fill it.
+ */
+ if (plane->format_count &&
+ (plane_resp->count_format_types >= plane->format_count)) {
+ format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
+ if (copy_to_user(format_ptr,
+ plane->format_types,
+ sizeof(uint32_t) * plane->format_count)) {
+ return -EFAULT;
+ }
+ }
+ plane_resp->count_format_types = plane->format_count;
+
+ return 0;
+}
+
+/**
+ * drm_plane_check_pixel_format - Check if the plane supports the pixel format
+ * @plane: plane to check for format support
+ * @format: the pixel format
+ *
+ * Returns:
+ * Zero of @plane has @format in its list of supported pixel formats, -EINVAL
+ * otherwise.
+ */
+int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
+{
+ unsigned int i;
+
+ for (i = 0; i < plane->format_count; i++) {
+ if (format == plane->format_types[i])
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * setplane_internal - setplane handler for internal callers
+ *
+ * Note that we assume an extra reference has already been taken on fb. If the
+ * update fails, this reference will be dropped before return; if it succeeds,
+ * the previous framebuffer (if any) will be unreferenced instead.
+ *
+ * src_{x,y,w,h} are provided in 16.16 fixed point format
+ */
+static int __setplane_internal(struct drm_plane *plane,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ int32_t crtc_x, int32_t crtc_y,
+ uint32_t crtc_w, uint32_t crtc_h,
+ /* src_{x,y,w,h} values are 16.16 fixed point */
+ uint32_t src_x, uint32_t src_y,
+ uint32_t src_w, uint32_t src_h)
+{
+ int ret = 0;
+ unsigned int fb_width, fb_height;
+
+ /* No fb means shut it down */
+ if (!fb) {
+ plane->old_fb = plane->fb;
+ ret = plane->funcs->disable_plane(plane);
+ if (!ret) {
+ plane->crtc = NULL;
+ plane->fb = NULL;
+ } else {
+ plane->old_fb = NULL;
+ }
+ goto out;
+ }
+
+ /* Check whether this plane is usable on this CRTC */
+ if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
+ DRM_DEBUG_KMS("Invalid crtc for plane\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* Check whether this plane supports the fb pixel format. */
+ ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
+ if (ret) {
+ DRM_DEBUG_KMS("Invalid pixel format %s\n",
+ drm_get_format_name(fb->pixel_format));
+ goto out;
+ }
+
+ /* Give drivers some help against integer overflows */
+ if (crtc_w > INT_MAX ||
+ crtc_x > INT_MAX - (int32_t) crtc_w ||
+ crtc_h > INT_MAX ||
+ crtc_y > INT_MAX - (int32_t) crtc_h) {
+ DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
+ crtc_w, crtc_h, crtc_x, crtc_y);
+ return -ERANGE;
+ }
+
+
+ fb_width = fb->width << 16;
+ fb_height = fb->height << 16;
+
+ /* Make sure source coordinates are inside the fb. */
+ if (src_w > fb_width ||
+ src_x > fb_width - src_w ||
+ src_h > fb_height ||
+ src_y > fb_height - src_h) {
+ DRM_DEBUG_KMS("Invalid source coordinates "
+ "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
+ src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
+ src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
+ src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
+ src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
+ ret = -ENOSPC;
+ goto out;
+ }
+
+ plane->old_fb = plane->fb;
+ ret = plane->funcs->update_plane(plane, crtc, fb,
+ crtc_x, crtc_y, crtc_w, crtc_h,
+ src_x, src_y, src_w, src_h);
+ if (!ret) {
+ plane->crtc = crtc;
+ plane->fb = fb;
+ fb = NULL;
+ } else {
+ plane->old_fb = NULL;
+ }
+
+out:
+ if (fb)
+ drm_framebuffer_unreference(fb);
+ if (plane->old_fb)
+ drm_framebuffer_unreference(plane->old_fb);
+ plane->old_fb = NULL;
+
+ return ret;
+}
+
+static int setplane_internal(struct drm_plane *plane,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ int32_t crtc_x, int32_t crtc_y,
+ uint32_t crtc_w, uint32_t crtc_h,
+ /* src_{x,y,w,h} values are 16.16 fixed point */
+ uint32_t src_x, uint32_t src_y,
+ uint32_t src_w, uint32_t src_h)
+{
+ int ret;
+
+ drm_modeset_lock_all(plane->dev);
+ ret = __setplane_internal(plane, crtc, fb,
+ crtc_x, crtc_y, crtc_w, crtc_h,
+ src_x, src_y, src_w, src_h);
+ drm_modeset_unlock_all(plane->dev);
+
+ return ret;
+}
+
+/**
+ * drm_mode_setplane - configure a plane's configuration
+ * @dev: DRM device
+ * @data: ioctl data*
+ * @file_priv: DRM file info
+ *
+ * Set plane configuration, including placement, fb, scaling, and other factors.
+ * Or pass a NULL fb to disable (planes may be disabled without providing a
+ * valid crtc).
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_setplane(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_set_plane *plane_req = data;
+ struct drm_plane *plane;
+ struct drm_crtc *crtc = NULL;
+ struct drm_framebuffer *fb = NULL;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ /*
+ * First, find the plane, crtc, and fb objects. If not available,
+ * we don't bother to call the driver.
+ */
+ plane = drm_plane_find(dev, plane_req->plane_id);
+ if (!plane) {
+ DRM_DEBUG_KMS("Unknown plane ID %d\n",
+ plane_req->plane_id);
+ return -ENOENT;
+ }
+
+ if (plane_req->fb_id) {
+ fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
+ if (!fb) {
+ DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
+ plane_req->fb_id);
+ return -ENOENT;
+ }
+
+ crtc = drm_crtc_find(dev, plane_req->crtc_id);
+ if (!crtc) {
+ DRM_DEBUG_KMS("Unknown crtc ID %d\n",
+ plane_req->crtc_id);
+ return -ENOENT;
+ }
+ }
+
+ /*
+ * setplane_internal will take care of deref'ing either the old or new
+ * framebuffer depending on success.
+ */
+ return setplane_internal(plane, crtc, fb,
+ plane_req->crtc_x, plane_req->crtc_y,
+ plane_req->crtc_w, plane_req->crtc_h,
+ plane_req->src_x, plane_req->src_y,
+ plane_req->src_w, plane_req->src_h);
+}
+
+/**
+ * drm_mode_set_config_internal - helper to call ->set_config
+ * @set: modeset config to set
+ *
+ * This is a little helper to wrap internal calls to the ->set_config driver
+ * interface. The only thing it adds is correct refcounting dance.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_set_config_internal(struct drm_mode_set *set)
+{
+ struct drm_crtc *crtc = set->crtc;
+ struct drm_framebuffer *fb;
+ struct drm_crtc *tmp;
+ int ret;
+
+ /*
+ * NOTE: ->set_config can also disable other crtcs (if we steal all
+ * connectors from it), hence we need to refcount the fbs across all
+ * crtcs. Atomic modeset will have saner semantics ...
+ */
+ list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head)
+ tmp->primary->old_fb = tmp->primary->fb;
+
+ fb = set->fb;
+
+ ret = crtc->funcs->set_config(set);
+ if (ret == 0) {
+ crtc->primary->crtc = crtc;
+ crtc->primary->fb = fb;
+ }
+
+ list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
+ if (tmp->primary->fb)
+ drm_framebuffer_reference(tmp->primary->fb);
+ if (tmp->primary->old_fb)
+ drm_framebuffer_unreference(tmp->primary->old_fb);
+ tmp->primary->old_fb = NULL;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_mode_set_config_internal);
+
+/**
+ * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
+ * @mode: mode to query
+ * @hdisplay: hdisplay value to fill in
+ * @vdisplay: vdisplay value to fill in
+ *
+ * The vdisplay value will be doubled if the specified mode is a stereo mode of
+ * the appropriate layout.
+ */
+void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
+ int *hdisplay, int *vdisplay)
+{
+ struct drm_display_mode adjusted;
+
+ drm_mode_copy(&adjusted, mode);
+ drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
+ *hdisplay = adjusted.crtc_hdisplay;
+ *vdisplay = adjusted.crtc_vdisplay;
+}
+EXPORT_SYMBOL(drm_crtc_get_hv_timing);
+
+/**
+ * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
+ * CRTC viewport
+ * @crtc: CRTC that framebuffer will be displayed on
+ * @x: x panning
+ * @y: y panning
+ * @mode: mode that framebuffer will be displayed under
+ * @fb: framebuffer to check size of
+ */
+int drm_crtc_check_viewport(const struct drm_crtc *crtc,
+ int x, int y,
+ const struct drm_display_mode *mode,
+ const struct drm_framebuffer *fb)
+
+{
+ int hdisplay, vdisplay;
+
+ drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
+
+ if (crtc->invert_dimensions)
+ swap(hdisplay, vdisplay);
+
+ if (hdisplay > fb->width ||
+ vdisplay > fb->height ||
+ x > fb->width - hdisplay ||
+ y > fb->height - vdisplay) {
+ DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
+ fb->width, fb->height, hdisplay, vdisplay, x, y,
+ crtc->invert_dimensions ? " (inverted)" : "");
+ return -ENOSPC;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_crtc_check_viewport);
+
+/**
+ * drm_mode_setcrtc - set CRTC configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Build a new CRTC configuration based on user request.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_setcrtc(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_config *config = &dev->mode_config;
+ struct drm_mode_crtc *crtc_req = data;
+ struct drm_crtc *crtc;
+ struct drm_connector **connector_set = NULL, *connector;
+ struct drm_framebuffer *fb = NULL;
+ struct drm_display_mode *mode = NULL;
+ struct drm_mode_set set;
+ uint32_t __user *set_connectors_ptr;
+ int ret;
+ int i;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ /* For some reason crtc x/y offsets are signed internally. */
+ if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
+ return -ERANGE;
+
+ drm_modeset_lock_all(dev);
+ crtc = drm_crtc_find(dev, crtc_req->crtc_id);
+ if (!crtc) {
+ DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
+ ret = -ENOENT;
+ goto out;
+ }
+ DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
+
+ if (crtc_req->mode_valid) {
+ /* If we have a mode we need a framebuffer. */
+ /* If we pass -1, set the mode with the currently bound fb */
+ if (crtc_req->fb_id == -1) {
+ if (!crtc->primary->fb) {
+ DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ fb = crtc->primary->fb;
+ /* Make refcounting symmetric with the lookup path. */
+ drm_framebuffer_reference(fb);
+ } else {
+ fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
+ if (!fb) {
+ DRM_DEBUG_KMS("Unknown FB ID%d\n",
+ crtc_req->fb_id);
+ ret = -ENOENT;
+ goto out;
+ }
+ }
+
+ mode = drm_mode_create(dev);
+ if (!mode) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = drm_crtc_convert_umode(mode, &crtc_req->mode);
+ if (ret) {
+ DRM_DEBUG_KMS("Invalid mode\n");
+ goto out;
+ }
+
+ mode->status = drm_mode_validate_basic(mode);
+ if (mode->status != MODE_OK) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
+
+ /*
+ * Check whether the primary plane supports the fb pixel format.
+ * Drivers not implementing the universal planes API use a
+ * default formats list provided by the DRM core which doesn't
+ * match real hardware capabilities. Skip the check in that
+ * case.
+ */
+ if (!crtc->primary->format_default) {
+ ret = drm_plane_check_pixel_format(crtc->primary,
+ fb->pixel_format);
+ if (ret) {
+ DRM_DEBUG_KMS("Invalid pixel format %s\n",
+ drm_get_format_name(fb->pixel_format));
+ goto out;
+ }
+ }
+
+ ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
+ mode, fb);
+ if (ret)
+ goto out;
+
+ }
+
+ if (crtc_req->count_connectors == 0 && mode) {
+ DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
+ DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
+ crtc_req->count_connectors);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (crtc_req->count_connectors > 0) {
+ u32 out_id;
+
+ /* Avoid unbounded kernel memory allocation */
+ if (crtc_req->count_connectors > config->num_connector) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ connector_set = kmalloc_array(crtc_req->count_connectors,
+ sizeof(struct drm_connector *),
+ GFP_KERNEL);
+ if (!connector_set) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < crtc_req->count_connectors; i++) {
+ set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
+ if (get_user(out_id, &set_connectors_ptr[i])) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ connector = drm_connector_find(dev, out_id);
+ if (!connector) {
+ DRM_DEBUG_KMS("Connector id %d unknown\n",
+ out_id);
+ ret = -ENOENT;
+ goto out;
+ }
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+ connector->base.id,
+ connector->name);
+
+ connector_set[i] = connector;
+ }
+ }
+
+ set.crtc = crtc;
+ set.x = crtc_req->x;
+ set.y = crtc_req->y;
+ set.mode = mode;
+ set.connectors = connector_set;
+ set.num_connectors = crtc_req->count_connectors;
+ set.fb = fb;
+ ret = drm_mode_set_config_internal(&set);
+
+out:
+ if (fb)
+ drm_framebuffer_unreference(fb);
+
+ kfree(connector_set);
+ drm_mode_destroy(dev, mode);
+ drm_modeset_unlock_all(dev);
+ return ret;
+}
+
+/**
+ * drm_mode_cursor_universal - translate legacy cursor ioctl call into a
+ * universal plane handler call
+ * @crtc: crtc to update cursor for
+ * @req: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Legacy cursor ioctl's work directly with driver buffer handles. To
+ * translate legacy ioctl calls into universal plane handler calls, we need to
+ * wrap the native buffer handle in a drm_framebuffer.
+ *
+ * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB
+ * buffer with a pitch of 4*width; the universal plane interface should be used
+ * directly in cases where the hardware can support other buffer settings and
+ * userspace wants to make use of these capabilities.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+static int drm_mode_cursor_universal(struct drm_crtc *crtc,
+ struct drm_mode_cursor2 *req,
+ struct drm_file *file_priv)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_framebuffer *fb = NULL;
+ struct drm_mode_fb_cmd2 fbreq = {
+ .width = req->width,
+ .height = req->height,
+ .pixel_format = DRM_FORMAT_ARGB8888,
+ .pitches = { req->width * 4 },
+ .handles = { req->handle },
+ };
+ int32_t crtc_x, crtc_y;
+ uint32_t crtc_w = 0, crtc_h = 0;
+ uint32_t src_w = 0, src_h = 0;
+ int ret = 0;
+
+ BUG_ON(!crtc->cursor);
+ WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
+
+ /*
+ * Obtain fb we'll be using (either new or existing) and take an extra
+ * reference to it if fb != null. setplane will take care of dropping
+ * the reference if the plane update fails.
+ */
+ if (req->flags & DRM_MODE_CURSOR_BO) {
+ if (req->handle) {
+ fb = internal_framebuffer_create(dev, &fbreq, file_priv);
+ if (IS_ERR(fb)) {
+ DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
+ return PTR_ERR(fb);
+ }
+ } else {
+ fb = NULL;
+ }
+ } else {
+ fb = crtc->cursor->fb;
+ if (fb)
+ drm_framebuffer_reference(fb);
+ }
+
+ if (req->flags & DRM_MODE_CURSOR_MOVE) {
+ crtc_x = req->x;
+ crtc_y = req->y;
+ } else {
+ crtc_x = crtc->cursor_x;
+ crtc_y = crtc->cursor_y;
+ }
+
+ if (fb) {
+ crtc_w = fb->width;
+ crtc_h = fb->height;
+ src_w = fb->width << 16;
+ src_h = fb->height << 16;
+ }
+
+ /*
+ * setplane_internal will take care of deref'ing either the old or new
+ * framebuffer depending on success.
+ */
+ ret = __setplane_internal(crtc->cursor, crtc, fb,
+ crtc_x, crtc_y, crtc_w, crtc_h,
+ 0, 0, src_w, src_h);
+
+ /* Update successful; save new cursor position, if necessary */
+ if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
+ crtc->cursor_x = req->x;
+ crtc->cursor_y = req->y;
+ }
+
+ return ret;
+}
+
+static int drm_mode_cursor_common(struct drm_device *dev,
+ struct drm_mode_cursor2 *req,
+ struct drm_file *file_priv)
+{
+ struct drm_crtc *crtc;
+ int ret = 0;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
+ return -EINVAL;
+
+ crtc = drm_crtc_find(dev, req->crtc_id);
+ if (!crtc) {
+ DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
+ return -ENOENT;
+ }
+
+ /*
+ * If this crtc has a universal cursor plane, call that plane's update
+ * handler rather than using legacy cursor handlers.
+ */
+ drm_modeset_lock_crtc(crtc, crtc->cursor);
+ if (crtc->cursor) {
+ ret = drm_mode_cursor_universal(crtc, req, file_priv);
+ goto out;
+ }
+
+ if (req->flags & DRM_MODE_CURSOR_BO) {
+ if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
+ ret = -ENXIO;
+ goto out;
+ }
+ /* Turns off the cursor if handle is 0 */
+ if (crtc->funcs->cursor_set2)
+ ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
+ req->width, req->height, req->hot_x, req->hot_y);
+ else
+ ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
+ req->width, req->height);
+ }
+
+ if (req->flags & DRM_MODE_CURSOR_MOVE) {
+ if (crtc->funcs->cursor_move) {
+ ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
+ } else {
+ ret = -EFAULT;
+ goto out;
+ }
+ }
+out:
+ drm_modeset_unlock_crtc(crtc);
+
+ return ret;
+
+}
+
+
+/**
+ * drm_mode_cursor_ioctl - set CRTC's cursor configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Set the cursor configuration based on user request.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_cursor_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_cursor *req = data;
+ struct drm_mode_cursor2 new_req;
+
+ memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
+ new_req.hot_x = new_req.hot_y = 0;
+
+ return drm_mode_cursor_common(dev, &new_req, file_priv);
+}
+
+/**
+ * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Set the cursor configuration based on user request. This implements the 2nd
+ * version of the cursor ioctl, which allows userspace to additionally specify
+ * the hotspot of the pointer.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_cursor2_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_cursor2 *req = data;
+
+ return drm_mode_cursor_common(dev, req, file_priv);
+}
+
+/**
+ * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
+ * @bpp: bits per pixels
+ * @depth: bit depth per pixel
+ *
+ * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
+ * Useful in fbdev emulation code, since that deals in those values.
+ */
+uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
+{
+ uint32_t fmt;
+
+ switch (bpp) {
+ case 8:
+ fmt = DRM_FORMAT_C8;
+ break;
+ case 16:
+ if (depth == 15)
+ fmt = DRM_FORMAT_XRGB1555;
+ else
+ fmt = DRM_FORMAT_RGB565;
+ break;
+ case 24:
+ fmt = DRM_FORMAT_RGB888;
+ break;
+ case 32:
+ if (depth == 24)
+ fmt = DRM_FORMAT_XRGB8888;
+ else if (depth == 30)
+ fmt = DRM_FORMAT_XRGB2101010;
+ else
+ fmt = DRM_FORMAT_ARGB8888;
+ break;
+ default:
+ DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
+ fmt = DRM_FORMAT_XRGB8888;
+ break;
+ }
+
+ return fmt;
+}
+EXPORT_SYMBOL(drm_mode_legacy_fb_format);
+
+/**
+ * drm_mode_addfb - add an FB to the graphics configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Add a new FB to the specified CRTC, given a user request. This is the
+ * original addfb ioctl which only supported RGB formats.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_addfb(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_fb_cmd *or = data;
+ struct drm_mode_fb_cmd2 r = {};
+ int ret;
+
+ /* convert to new format and call new ioctl */
+ r.fb_id = or->fb_id;
+ r.width = or->width;
+ r.height = or->height;
+ r.pitches[0] = or->pitch;
+ r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
+ r.handles[0] = or->handle;
+
+ ret = drm_mode_addfb2(dev, &r, file_priv);
+ if (ret)
+ return ret;
+
+ or->fb_id = r.fb_id;
+
+ return 0;
+}
+
+static int format_check(const struct drm_mode_fb_cmd2 *r)
+{
+ uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
+
+ switch (format) {
+ case DRM_FORMAT_C8:
+ case DRM_FORMAT_RGB332:
+ case DRM_FORMAT_BGR233:
+ case DRM_FORMAT_XRGB4444:
+ case DRM_FORMAT_XBGR4444:
+ case DRM_FORMAT_RGBX4444:
+ case DRM_FORMAT_BGRX4444:
+ case DRM_FORMAT_ARGB4444:
+ case DRM_FORMAT_ABGR4444:
+ case DRM_FORMAT_RGBA4444:
+ case DRM_FORMAT_BGRA4444:
+ case DRM_FORMAT_XRGB1555:
+ case DRM_FORMAT_XBGR1555:
+ case DRM_FORMAT_RGBX5551:
+ case DRM_FORMAT_BGRX5551:
+ case DRM_FORMAT_ARGB1555:
+ case DRM_FORMAT_ABGR1555:
+ case DRM_FORMAT_RGBA5551:
+ case DRM_FORMAT_BGRA5551:
+ case DRM_FORMAT_RGB565:
+ case DRM_FORMAT_BGR565:
+ case DRM_FORMAT_RGB888:
+ case DRM_FORMAT_BGR888:
+ case DRM_FORMAT_XRGB8888:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_RGBX8888:
+ case DRM_FORMAT_BGRX8888:
+ case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_ABGR8888:
+ case DRM_FORMAT_RGBA8888:
+ case DRM_FORMAT_BGRA8888:
+ case DRM_FORMAT_XRGB2101010:
+ case DRM_FORMAT_XBGR2101010:
+ case DRM_FORMAT_RGBX1010102:
+ case DRM_FORMAT_BGRX1010102:
+ case DRM_FORMAT_ARGB2101010:
+ case DRM_FORMAT_ABGR2101010:
+ case DRM_FORMAT_RGBA1010102:
+ case DRM_FORMAT_BGRA1010102:
+ case DRM_FORMAT_YUYV:
+ case DRM_FORMAT_YVYU:
+ case DRM_FORMAT_UYVY:
+ case DRM_FORMAT_VYUY:
+ case DRM_FORMAT_AYUV:
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ case DRM_FORMAT_NV16:
+ case DRM_FORMAT_NV61:
+ case DRM_FORMAT_NV24:
+ case DRM_FORMAT_NV42:
+ case DRM_FORMAT_YUV410:
+ case DRM_FORMAT_YVU410:
+ case DRM_FORMAT_YUV411:
+ case DRM_FORMAT_YVU411:
+ case DRM_FORMAT_YUV420:
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YUV422:
+ case DRM_FORMAT_YVU422:
+ case DRM_FORMAT_YUV444:
+ case DRM_FORMAT_YVU444:
+ return 0;
+ default:
+ DRM_DEBUG_KMS("invalid pixel format %s\n",
+ drm_get_format_name(r->pixel_format));
+ return -EINVAL;
+ }
+}
+
+static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
+{
+ int ret, hsub, vsub, num_planes, i;
+
+ ret = format_check(r);
+ if (ret) {
+ DRM_DEBUG_KMS("bad framebuffer format %s\n",
+ drm_get_format_name(r->pixel_format));
+ return ret;
+ }
+
+ hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
+ vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
+ num_planes = drm_format_num_planes(r->pixel_format);
+
+ if (r->width == 0 || r->width % hsub) {
+ DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
+ return -EINVAL;
+ }
+
+ if (r->height == 0 || r->height % vsub) {
+ DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < num_planes; i++) {
+ unsigned int width = r->width / (i != 0 ? hsub : 1);
+ unsigned int height = r->height / (i != 0 ? vsub : 1);
+ unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
+
+ if (!r->handles[i]) {
+ DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
+ return -EINVAL;
+ }
+
+ if ((uint64_t) width * cpp > UINT_MAX)
+ return -ERANGE;
+
+ if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
+ return -ERANGE;
+
+ if (r->pitches[i] < width * cpp) {
+ DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
+ return -EINVAL;
+ }
+
+ if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
+ DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
+ r->modifier[i], i);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static struct drm_framebuffer *
+internal_framebuffer_create(struct drm_device *dev,
+ struct drm_mode_fb_cmd2 *r,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_config *config = &dev->mode_config;
+ struct drm_framebuffer *fb;
+ int ret;
+
+ if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
+ DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if ((config->min_width > r->width) || (r->width > config->max_width)) {
+ DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
+ r->width, config->min_width, config->max_width);
+ return ERR_PTR(-EINVAL);
+ }
+ if ((config->min_height > r->height) || (r->height > config->max_height)) {
+ DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
+ r->height, config->min_height, config->max_height);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (r->flags & DRM_MODE_FB_MODIFIERS &&
+ !dev->mode_config.allow_fb_modifiers) {
+ DRM_DEBUG_KMS("driver does not support fb modifiers\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ ret = framebuffer_check(r);
+ if (ret)
+ return ERR_PTR(ret);
+
+ fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
+ if (IS_ERR(fb)) {
+ DRM_DEBUG_KMS("could not create framebuffer\n");
+ return fb;
+ }
+
+ return fb;
+}
+
+/**
+ * drm_mode_addfb2 - add an FB to the graphics configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Add a new FB to the specified CRTC, given a user request with format. This is
+ * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
+ * and uses fourcc codes as pixel format specifiers.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_addfb2(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_fb_cmd2 *r = data;
+ struct drm_framebuffer *fb;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ fb = internal_framebuffer_create(dev, r, file_priv);
+ if (IS_ERR(fb))
+ return PTR_ERR(fb);
+
+ /* Transfer ownership to the filp for reaping on close */
+
+ DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
+ mutex_lock(&file_priv->fbs_lock);
+ r->fb_id = fb->base.id;
+ list_add(&fb->filp_head, &file_priv->fbs);
+ mutex_unlock(&file_priv->fbs_lock);
+
+ return 0;
+}
+
+/**
+ * drm_mode_rmfb - remove an FB from the configuration
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Remove the FB specified by the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_rmfb(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_framebuffer *fb = NULL;
+ struct drm_framebuffer *fbl = NULL;
+ uint32_t *id = data;
+ int found = 0;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ mutex_lock(&file_priv->fbs_lock);
+ mutex_lock(&dev->mode_config.fb_lock);
+ fb = __drm_framebuffer_lookup(dev, *id);
+ if (!fb)
+ goto fail_lookup;
+
+ list_for_each_entry(fbl, &file_priv->fbs, filp_head)
+ if (fb == fbl)
+ found = 1;
+ if (!found)
+ goto fail_lookup;
+
+ /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
+ __drm_framebuffer_unregister(dev, fb);
+
+ list_del_init(&fb->filp_head);
+ mutex_unlock(&dev->mode_config.fb_lock);
+ mutex_unlock(&file_priv->fbs_lock);
+
+ drm_framebuffer_remove(fb);
+
+ return 0;
+
+fail_lookup:
+ mutex_unlock(&dev->mode_config.fb_lock);
+ mutex_unlock(&file_priv->fbs_lock);
+
+ return -ENOENT;
+}
+
+/**
+ * drm_mode_getfb - get FB info
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Lookup the FB given its ID and return info about it.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getfb(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_fb_cmd *r = data;
+ struct drm_framebuffer *fb;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ fb = drm_framebuffer_lookup(dev, r->fb_id);
+ if (!fb)
+ return -ENOENT;
+
+ r->height = fb->height;
+ r->width = fb->width;
+ r->depth = fb->depth;
+ r->bpp = fb->bits_per_pixel;
+ r->pitch = fb->pitches[0];
+ if (fb->funcs->create_handle) {
+ if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
+ drm_is_control_client(file_priv)) {
+ ret = fb->funcs->create_handle(fb, file_priv,
+ &r->handle);
+ } else {
+ /* GET_FB() is an unprivileged ioctl so we must not
+ * return a buffer-handle to non-master processes! For
+ * backwards-compatibility reasons, we cannot make
+ * GET_FB() privileged, so just return an invalid handle
+ * for non-masters. */
+ r->handle = 0;
+ ret = 0;
+ }
+ } else {
+ ret = -ENODEV;
+ }
+
+ drm_framebuffer_unreference(fb);
+
+ return ret;
+}
+
+/**
+ * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
+ *
+ * Lookup the FB and flush out the damaged area supplied by userspace as a clip
+ * rectangle list. Generic userspace which does frontbuffer rendering must call
+ * this ioctl to flush out the changes on manual-update display outputs, e.g.
+ * usb display-link, mipi manual update panels or edp panel self refresh modes.
+ *
+ * Modesetting drivers which always update the frontbuffer do not need to
+ * implement the corresponding ->dirty framebuffer callback.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_clip_rect __user *clips_ptr;
+ struct drm_clip_rect *clips = NULL;
+ struct drm_mode_fb_dirty_cmd *r = data;
+ struct drm_framebuffer *fb;
+ unsigned flags;
+ int num_clips;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ fb = drm_framebuffer_lookup(dev, r->fb_id);
+ if (!fb)
+ return -ENOENT;
+
+ num_clips = r->num_clips;
+ clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
+
+ if (!num_clips != !clips_ptr) {
+ ret = -EINVAL;
+ goto out_err1;
+ }
+
+ flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
+
+ /* If userspace annotates copy, clips must come in pairs */
+ if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
+ ret = -EINVAL;
+ goto out_err1;
+ }
+
+ if (num_clips && clips_ptr) {
+ if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
+ ret = -EINVAL;
+ goto out_err1;
+ }
+ clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
+ if (!clips) {
+ ret = -ENOMEM;
+ goto out_err1;
+ }
+
+ ret = copy_from_user(clips, clips_ptr,
+ num_clips * sizeof(*clips));
+ if (ret) {
+ ret = -EFAULT;
+ goto out_err2;
+ }
+ }
+
+ if (fb->funcs->dirty) {
+ ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
+ clips, num_clips);
+ } else {
+ ret = -ENOSYS;
+ }
+
+out_err2:
+ kfree(clips);
+out_err1:
+ drm_framebuffer_unreference(fb);
+
+ return ret;
+}
+
+
+/**
+ * drm_fb_release - remove and free the FBs on this file
+ * @priv: drm file for the ioctl
+ *
+ * Destroy all the FBs associated with @filp.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+void drm_fb_release(struct drm_file *priv)
+{
+ struct drm_device *dev = priv->minor->dev;
+ struct drm_framebuffer *fb, *tfb;
+
+ /*
+ * When the file gets released that means no one else can access the fb
+ * list any more, so no need to grab fpriv->fbs_lock. And we need to
+ * avoid upsetting lockdep since the universal cursor code adds a
+ * framebuffer while holding mutex locks.
+ *
+ * Note that a real deadlock between fpriv->fbs_lock and the modeset
+ * locks is impossible here since no one else but this function can get
+ * at it any more.
+ */
+ list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
+ __drm_framebuffer_unregister(dev, fb);
+ mutex_unlock(&dev->mode_config.fb_lock);
+
+ list_del_init(&fb->filp_head);
+
+ /* This will also drop the fpriv->fbs reference. */
+ drm_framebuffer_remove(fb);
+ }
+}
+
+/**
+ * drm_property_create - create a new property type
+ * @dev: drm device
+ * @flags: flags specifying the property type
+ * @name: name of the property
+ * @num_values: number of pre-defined values
+ *
+ * This creates a new generic drm property which can then be attached to a drm
+ * object with drm_object_attach_property. The returned property object must be
+ * freed with drm_property_destroy.
+ *
+ * Note that the DRM core keeps a per-device list of properties and that, if
+ * drm_mode_config_cleanup() is called, it will destroy all properties created
+ * by the driver.
+ *
+ * Returns:
+ * A pointer to the newly created property on success, NULL on failure.
+ */
+struct drm_property *drm_property_create(struct drm_device *dev, int flags,
+ const char *name, int num_values)
+{
+ struct drm_property *property = NULL;
+ int ret;
+
+ property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
+ if (!property)
+ return NULL;
+
+ property->dev = dev;
+
+ if (num_values) {
+ property->values = kcalloc(num_values, sizeof(uint64_t),
+ GFP_KERNEL);
+ if (!property->values)
+ goto fail;
+ }
+
+ ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
+ if (ret)
+ goto fail;
+
+ property->flags = flags;
+ property->num_values = num_values;
+ INIT_LIST_HEAD(&property->enum_list);
+
+ if (name) {
+ strncpy(property->name, name, DRM_PROP_NAME_LEN);
+ property->name[DRM_PROP_NAME_LEN-1] = '\0';
+ }
+
+ list_add_tail(&property->head, &dev->mode_config.property_list);
+
+ WARN_ON(!drm_property_type_valid(property));
+
+ return property;
+fail:
+ kfree(property->values);
+ kfree(property);
+ return NULL;
+}
+EXPORT_SYMBOL(drm_property_create);
+
+/**
+ * drm_property_create_enum - create a new enumeration property type
+ * @dev: drm device
+ * @flags: flags specifying the property type
+ * @name: name of the property
+ * @props: enumeration lists with property values
+ * @num_values: number of pre-defined values
+ *
+ * This creates a new generic drm property which can then be attached to a drm
+ * object with drm_object_attach_property. The returned property object must be
+ * freed with drm_property_destroy.
+ *
+ * Userspace is only allowed to set one of the predefined values for enumeration
+ * properties.
+ *
+ * Returns:
+ * A pointer to the newly created property on success, NULL on failure.
+ */
+struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
+ const char *name,
+ const struct drm_prop_enum_list *props,
+ int num_values)
+{
+ struct drm_property *property;
+ int i, ret;
+
+ flags |= DRM_MODE_PROP_ENUM;
+
+ property = drm_property_create(dev, flags, name, num_values);
+ if (!property)
+ return NULL;
+
+ for (i = 0; i < num_values; i++) {
+ ret = drm_property_add_enum(property, i,
+ props[i].type,
+ props[i].name);
+ if (ret) {
+ drm_property_destroy(dev, property);
+ return NULL;
+ }
+ }
+
+ return property;
+}
+EXPORT_SYMBOL(drm_property_create_enum);
+
+/**
+ * drm_property_create_bitmask - create a new bitmask property type
+ * @dev: drm device
+ * @flags: flags specifying the property type
+ * @name: name of the property
+ * @props: enumeration lists with property bitflags
+ * @num_props: size of the @props array
+ * @supported_bits: bitmask of all supported enumeration values
+ *
+ * This creates a new bitmask drm property which can then be attached to a drm
+ * object with drm_object_attach_property. The returned property object must be
+ * freed with drm_property_destroy.
+ *
+ * Compared to plain enumeration properties userspace is allowed to set any
+ * or'ed together combination of the predefined property bitflag values
+ *
+ * Returns:
+ * A pointer to the newly created property on success, NULL on failure.
+ */
+struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
+ int flags, const char *name,
+ const struct drm_prop_enum_list *props,
+ int num_props,
+ uint64_t supported_bits)
+{
+ struct drm_property *property;
+ int i, ret, index = 0;
+ int num_values = hweight64(supported_bits);
+
+ flags |= DRM_MODE_PROP_BITMASK;
+
+ property = drm_property_create(dev, flags, name, num_values);
+ if (!property)
+ return NULL;
+ for (i = 0; i < num_props; i++) {
+ if (!(supported_bits & (1ULL << props[i].type)))
+ continue;
+
+ if (WARN_ON(index >= num_values)) {
+ drm_property_destroy(dev, property);
+ return NULL;
+ }
+
+ ret = drm_property_add_enum(property, index++,
+ props[i].type,
+ props[i].name);
+ if (ret) {
+ drm_property_destroy(dev, property);
+ return NULL;
+ }
+ }
+
+ return property;
+}
+EXPORT_SYMBOL(drm_property_create_bitmask);
+
+static struct drm_property *property_create_range(struct drm_device *dev,
+ int flags, const char *name,
+ uint64_t min, uint64_t max)
+{
+ struct drm_property *property;
+
+ property = drm_property_create(dev, flags, name, 2);
+ if (!property)
+ return NULL;
+
+ property->values[0] = min;
+ property->values[1] = max;
+
+ return property;
+}
+
+/**
+ * drm_property_create_range - create a new unsigned ranged property type
+ * @dev: drm device
+ * @flags: flags specifying the property type
+ * @name: name of the property
+ * @min: minimum value of the property
+ * @max: maximum value of the property
+ *
+ * This creates a new generic drm property which can then be attached to a drm
+ * object with drm_object_attach_property. The returned property object must be
+ * freed with drm_property_destroy.
+ *
+ * Userspace is allowed to set any unsigned integer value in the (min, max)
+ * range inclusive.
+ *
+ * Returns:
+ * A pointer to the newly created property on success, NULL on failure.
+ */
+struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
+ const char *name,
+ uint64_t min, uint64_t max)
+{
+ return property_create_range(dev, DRM_MODE_PROP_RANGE | flags,
+ name, min, max);
+}
+EXPORT_SYMBOL(drm_property_create_range);
+
+/**
+ * drm_property_create_signed_range - create a new signed ranged property type
+ * @dev: drm device
+ * @flags: flags specifying the property type
+ * @name: name of the property
+ * @min: minimum value of the property
+ * @max: maximum value of the property
+ *
+ * This creates a new generic drm property which can then be attached to a drm
+ * object with drm_object_attach_property. The returned property object must be
+ * freed with drm_property_destroy.
+ *
+ * Userspace is allowed to set any signed integer value in the (min, max)
+ * range inclusive.
+ *
+ * Returns:
+ * A pointer to the newly created property on success, NULL on failure.
+ */
+struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
+ int flags, const char *name,
+ int64_t min, int64_t max)
+{
+ return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags,
+ name, I642U64(min), I642U64(max));
+}
+EXPORT_SYMBOL(drm_property_create_signed_range);
+
+/**
+ * drm_property_create_object - create a new object property type
+ * @dev: drm device
+ * @flags: flags specifying the property type
+ * @name: name of the property
+ * @type: object type from DRM_MODE_OBJECT_* defines
+ *
+ * This creates a new generic drm property which can then be attached to a drm
+ * object with drm_object_attach_property. The returned property object must be
+ * freed with drm_property_destroy.
+ *
+ * Userspace is only allowed to set this to any property value of the given
+ * @type. Only useful for atomic properties, which is enforced.
+ *
+ * Returns:
+ * A pointer to the newly created property on success, NULL on failure.
+ */
+struct drm_property *drm_property_create_object(struct drm_device *dev,
+ int flags, const char *name, uint32_t type)
+{
+ struct drm_property *property;
+
+ flags |= DRM_MODE_PROP_OBJECT;
+
+ if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC)))
+ return NULL;
+
+ property = drm_property_create(dev, flags, name, 1);
+ if (!property)
+ return NULL;
+
+ property->values[0] = type;
+
+ return property;
+}
+EXPORT_SYMBOL(drm_property_create_object);
+
+/**
+ * drm_property_create_bool - create a new boolean property type
+ * @dev: drm device
+ * @flags: flags specifying the property type
+ * @name: name of the property
+ *
+ * This creates a new generic drm property which can then be attached to a drm
+ * object with drm_object_attach_property. The returned property object must be
+ * freed with drm_property_destroy.
+ *
+ * This is implemented as a ranged property with only {0, 1} as valid values.
+ *
+ * Returns:
+ * A pointer to the newly created property on success, NULL on failure.
+ */
+struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags,
+ const char *name)
+{
+ return drm_property_create_range(dev, flags, name, 0, 1);
+}
+EXPORT_SYMBOL(drm_property_create_bool);
+
+/**
+ * drm_property_add_enum - add a possible value to an enumeration property
+ * @property: enumeration property to change
+ * @index: index of the new enumeration
+ * @value: value of the new enumeration
+ * @name: symbolic name of the new enumeration
+ *
+ * This functions adds enumerations to a property.
+ *
+ * It's use is deprecated, drivers should use one of the more specific helpers
+ * to directly create the property with all enumerations already attached.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_property_add_enum(struct drm_property *property, int index,
+ uint64_t value, const char *name)
+{
+ struct drm_property_enum *prop_enum;
+
+ if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
+ drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
+ return -EINVAL;
+
+ /*
+ * Bitmask enum properties have the additional constraint of values
+ * from 0 to 63
+ */
+ if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
+ (value > 63))
+ return -EINVAL;
+
+ if (!list_empty(&property->enum_list)) {
+ list_for_each_entry(prop_enum, &property->enum_list, head) {
+ if (prop_enum->value == value) {
+ strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
+ prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
+ return 0;
+ }
+ }
+ }
+
+ prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
+ if (!prop_enum)
+ return -ENOMEM;
+
+ strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
+ prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
+ prop_enum->value = value;
+
+ property->values[index] = value;
+ list_add_tail(&prop_enum->head, &property->enum_list);
+ return 0;
+}
+EXPORT_SYMBOL(drm_property_add_enum);
+
+/**
+ * drm_property_destroy - destroy a drm property
+ * @dev: drm device
+ * @property: property to destry
+ *
+ * This function frees a property including any attached resources like
+ * enumeration values.
+ */
+void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
+{
+ struct drm_property_enum *prop_enum, *pt;
+
+ list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) {
+ list_del(&prop_enum->head);
+ kfree(prop_enum);
+ }
+
+ if (property->num_values)
+ kfree(property->values);
+ drm_mode_object_put(dev, &property->base);
+ list_del(&property->head);
+ kfree(property);
+}
+EXPORT_SYMBOL(drm_property_destroy);
+
+/**
+ * drm_object_attach_property - attach a property to a modeset object
+ * @obj: drm modeset object
+ * @property: property to attach
+ * @init_val: initial value of the property
+ *
+ * This attaches the given property to the modeset object with the given initial
+ * value. Currently this function cannot fail since the properties are stored in
+ * a statically sized array.
+ */
+void drm_object_attach_property(struct drm_mode_object *obj,
+ struct drm_property *property,
+ uint64_t init_val)
+{
+ int count = obj->properties->count;
+
+ if (count == DRM_OBJECT_MAX_PROPERTY) {
+ WARN(1, "Failed to attach object property (type: 0x%x). Please "
+ "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
+ "you see this message on the same object type.\n",
+ obj->type);
+ return;
+ }
+
+ obj->properties->properties[count] = property;
+ obj->properties->values[count] = init_val;
+ obj->properties->count++;
+ if (property->flags & DRM_MODE_PROP_ATOMIC)
+ obj->properties->atomic_count++;
+}
+EXPORT_SYMBOL(drm_object_attach_property);
+
+/**
+ * drm_object_property_set_value - set the value of a property
+ * @obj: drm mode object to set property value for
+ * @property: property to set
+ * @val: value the property should be set to
+ *
+ * This functions sets a given property on a given object. This function only
+ * changes the software state of the property, it does not call into the
+ * driver's ->set_property callback.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_object_property_set_value(struct drm_mode_object *obj,
+ struct drm_property *property, uint64_t val)
+{
+ int i;
+
+ for (i = 0; i < obj->properties->count; i++) {
+ if (obj->properties->properties[i] == property) {
+ obj->properties->values[i] = val;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(drm_object_property_set_value);
+
+/**
+ * drm_object_property_get_value - retrieve the value of a property
+ * @obj: drm mode object to get property value from
+ * @property: property to retrieve
+ * @val: storage for the property value
+ *
+ * This function retrieves the softare state of the given property for the given
+ * property. Since there is no driver callback to retrieve the current property
+ * value this might be out of sync with the hardware, depending upon the driver
+ * and property.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_object_property_get_value(struct drm_mode_object *obj,
+ struct drm_property *property, uint64_t *val)
+{
+ int i;
+
+ /* read-only properties bypass atomic mechanism and still store
+ * their value in obj->properties->values[].. mostly to avoid
+ * having to deal w/ EDID and similar props in atomic paths:
+ */
+ if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
+ !(property->flags & DRM_MODE_PROP_IMMUTABLE))
+ return drm_atomic_get_property(obj, property, val);
+
+ for (i = 0; i < obj->properties->count; i++) {
+ if (obj->properties->properties[i] == property) {
+ *val = obj->properties->values[i];
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(drm_object_property_get_value);
+
+/**
+ * drm_mode_getproperty_ioctl - get the property metadata
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This function retrieves the metadata for a given property, like the different
+ * possible values for an enum property or the limits for a range property.
+ *
+ * Blob properties are special
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getproperty_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_get_property *out_resp = data;
+ struct drm_property *property;
+ int enum_count = 0;
+ int value_count = 0;
+ int ret = 0, i;
+ int copied;
+ struct drm_property_enum *prop_enum;
+ struct drm_mode_property_enum __user *enum_ptr;
+ uint64_t __user *values_ptr;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ drm_modeset_lock_all(dev);
+ property = drm_property_find(dev, out_resp->prop_id);
+ if (!property) {
+ ret = -ENOENT;
+ goto done;
+ }
+
+ if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
+ drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
+ list_for_each_entry(prop_enum, &property->enum_list, head)
+ enum_count++;
+ }
+
+ value_count = property->num_values;
+
+ strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
+ out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
+ out_resp->flags = property->flags;
+
+ if ((out_resp->count_values >= value_count) && value_count) {
+ values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
+ for (i = 0; i < value_count; i++) {
+ if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
+ ret = -EFAULT;
+ goto done;
+ }
+ }
+ }
+ out_resp->count_values = value_count;
+
+ if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
+ drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
+ if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
+ copied = 0;
+ enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
+ list_for_each_entry(prop_enum, &property->enum_list, head) {
+
+ if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
+ ret = -EFAULT;
+ goto done;
+ }
+
+ if (copy_to_user(&enum_ptr[copied].name,
+ &prop_enum->name, DRM_PROP_NAME_LEN)) {
+ ret = -EFAULT;
+ goto done;
+ }
+ copied++;
+ }
+ }
+ out_resp->count_enum_blobs = enum_count;
+ }
+
+ /*
+ * NOTE: The idea seems to have been to use this to read all the blob
+ * property values. But nothing ever added them to the corresponding
+ * list, userspace always used the special-purpose get_blob ioctl to
+ * read the value for a blob property. It also doesn't make a lot of
+ * sense to return values here when everything else is just metadata for
+ * the property itself.
+ */
+ if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
+ out_resp->count_enum_blobs = 0;
+done:
+ drm_modeset_unlock_all(dev);
+ return ret;
+}
+
+static struct drm_property_blob *
+drm_property_create_blob(struct drm_device *dev, size_t length,
+ const void *data)
+{
+ struct drm_property_blob *blob;
+ int ret;
+
+ if (!length || !data)
+ return NULL;
+
+ blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
+ if (!blob)
+ return NULL;
+
+ ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
+ if (ret) {
+ kfree(blob);
+ return NULL;
+ }
+
+ blob->length = length;
+
+ memcpy(blob->data, data, length);
+
+ list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
+ return blob;
+}
+
+static void drm_property_destroy_blob(struct drm_device *dev,
+ struct drm_property_blob *blob)
+{
+ drm_mode_object_put(dev, &blob->base);
+ list_del(&blob->head);
+ kfree(blob);
+}
+
+/**
+ * drm_mode_getblob_ioctl - get the contents of a blob property value
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This function retrieves the contents of a blob property. The value stored in
+ * an object's blob property is just a normal modeset object id.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_getblob_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_get_blob *out_resp = data;
+ struct drm_property_blob *blob;
+ int ret = 0;
+ void __user *blob_ptr;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ drm_modeset_lock_all(dev);
+ blob = drm_property_blob_find(dev, out_resp->blob_id);
+ if (!blob) {
+ ret = -ENOENT;
+ goto done;
+ }
+
+ if (out_resp->length == blob->length) {
+ blob_ptr = (void __user *)(unsigned long)out_resp->data;
+ if (copy_to_user(blob_ptr, blob->data, blob->length)) {
+ ret = -EFAULT;
+ goto done;
+ }
+ }
+ out_resp->length = blob->length;
+
+done:
+ drm_modeset_unlock_all(dev);
+ return ret;
+}
+
+/**
+ * drm_mode_connector_set_path_property - set tile property on connector
+ * @connector: connector to set property on.
+ * @path: path to use for property.
+ *
+ * This creates a property to expose to userspace to specify a
+ * connector path. This is mainly used for DisplayPort MST where
+ * connectors have a topology and we want to allow userspace to give
+ * them more meaningful names.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_connector_set_path_property(struct drm_connector *connector,
+ const char *path)
+{
+ struct drm_device *dev = connector->dev;
+ size_t size = strlen(path) + 1;
+ int ret;
+
+ connector->path_blob_ptr = drm_property_create_blob(connector->dev,
+ size, path);
+ if (!connector->path_blob_ptr)
+ return -EINVAL;
+
+ ret = drm_object_property_set_value(&connector->base,
+ dev->mode_config.path_property,
+ connector->path_blob_ptr->base.id);
+ return ret;
+}
+EXPORT_SYMBOL(drm_mode_connector_set_path_property);
+
+/**
+ * drm_mode_connector_set_tile_property - set tile property on connector
+ * @connector: connector to set property on.
+ *
+ * This looks up the tile information for a connector, and creates a
+ * property for userspace to parse if it exists. The property is of
+ * the form of 8 integers using ':' as a separator.
+ *
+ * Returns:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_connector_set_tile_property(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+ int ret, size;
+ char tile[256];
+
+ if (connector->tile_blob_ptr)
+ drm_property_destroy_blob(dev, connector->tile_blob_ptr);
+
+ if (!connector->has_tile) {
+ connector->tile_blob_ptr = NULL;
+ ret = drm_object_property_set_value(&connector->base,
+ dev->mode_config.tile_property, 0);
+ return ret;
+ }
+
+ snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
+ connector->tile_group->id, connector->tile_is_single_monitor,
+ connector->num_h_tile, connector->num_v_tile,
+ connector->tile_h_loc, connector->tile_v_loc,
+ connector->tile_h_size, connector->tile_v_size);
+ size = strlen(tile) + 1;
+
+ connector->tile_blob_ptr = drm_property_create_blob(connector->dev,
+ size, tile);
+ if (!connector->tile_blob_ptr)
+ return -EINVAL;
+
+ ret = drm_object_property_set_value(&connector->base,
+ dev->mode_config.tile_property,
+ connector->tile_blob_ptr->base.id);
+ return ret;
+}
+EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
+
+/**
+ * drm_mode_connector_update_edid_property - update the edid property of a connector
+ * @connector: drm connector
+ * @edid: new value of the edid property
+ *
+ * This function creates a new blob modeset object and assigns its id to the
+ * connector's edid property.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_connector_update_edid_property(struct drm_connector *connector,
+ const struct edid *edid)
+{
+ struct drm_device *dev = connector->dev;
+ size_t size;
+ int ret;
+
+ /* ignore requests to set edid when overridden */
+ if (connector->override_edid)
+ return 0;
+
+ if (connector->edid_blob_ptr)
+ drm_property_destroy_blob(dev, connector->edid_blob_ptr);
+
+ /* Delete edid, when there is none. */
+ if (!edid) {
+ connector->edid_blob_ptr = NULL;
+ ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0);
+ return ret;
+ }
+
+ size = EDID_LENGTH * (1 + edid->extensions);
+ connector->edid_blob_ptr = drm_property_create_blob(connector->dev,
+ size, edid);
+ if (!connector->edid_blob_ptr)
+ return -EINVAL;
+
+ ret = drm_object_property_set_value(&connector->base,
+ dev->mode_config.edid_property,
+ connector->edid_blob_ptr->base.id);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
+
+/* Some properties could refer to dynamic refcnt'd objects, or things that
+ * need special locking to handle lifetime issues (ie. to ensure the prop
+ * value doesn't become invalid part way through the property update due to
+ * race). The value returned by reference via 'obj' should be passed back
+ * to drm_property_change_valid_put() after the property is set (and the
+ * object to which the property is attached has a chance to take it's own
+ * reference).
+ */
+bool drm_property_change_valid_get(struct drm_property *property,
+ uint64_t value, struct drm_mode_object **ref)
+{
+ int i;
+
+ if (property->flags & DRM_MODE_PROP_IMMUTABLE)
+ return false;
+
+ *ref = NULL;
+
+ if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
+ if (value < property->values[0] || value > property->values[1])
+ return false;
+ return true;
+ } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) {
+ int64_t svalue = U642I64(value);
+
+ if (svalue < U642I64(property->values[0]) ||
+ svalue > U642I64(property->values[1]))
+ return false;
+ return true;
+ } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
+ uint64_t valid_mask = 0;
+
+ for (i = 0; i < property->num_values; i++)
+ valid_mask |= (1ULL << property->values[i]);
+ return !(value & ~valid_mask);
+ } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
+ /* Only the driver knows */
+ return true;
+ } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
+ /* a zero value for an object property translates to null: */
+ if (value == 0)
+ return true;
+
+ /* handle refcnt'd objects specially: */
+ if (property->values[0] == DRM_MODE_OBJECT_FB) {
+ struct drm_framebuffer *fb;
+ fb = drm_framebuffer_lookup(property->dev, value);
+ if (fb) {
+ *ref = &fb->base;
+ return true;
+ } else {
+ return false;
+ }
+ } else {
+ return _object_find(property->dev, value, property->values[0]) != NULL;
+ }
+ }
+
+ for (i = 0; i < property->num_values; i++)
+ if (property->values[i] == value)
+ return true;
+ return false;
+}
+
+void drm_property_change_valid_put(struct drm_property *property,
+ struct drm_mode_object *ref)
+{
+ if (!ref)
+ return;
+
+ if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
+ if (property->values[0] == DRM_MODE_OBJECT_FB)
+ drm_framebuffer_unreference(obj_to_fb(ref));
+ }
+}
+
+/**
+ * drm_mode_connector_property_set_ioctl - set the current value of a connector property
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This function sets the current value for a connectors's property. It also
+ * calls into a driver's ->set_property callback to update the hardware state
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_connector_set_property *conn_set_prop = data;
+ struct drm_mode_obj_set_property obj_set_prop = {
+ .value = conn_set_prop->value,
+ .prop_id = conn_set_prop->prop_id,
+ .obj_id = conn_set_prop->connector_id,
+ .obj_type = DRM_MODE_OBJECT_CONNECTOR
+ };
+
+ /* It does all the locking and checking we need */
+ return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
+}
+
+static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
+ struct drm_property *property,
+ uint64_t value)
+{
+ int ret = -EINVAL;
+ struct drm_connector *connector = obj_to_connector(obj);
+
+ /* Do DPMS ourselves */
+ if (property == connector->dev->mode_config.dpms_property) {
+ if (connector->funcs->dpms)
+ (*connector->funcs->dpms)(connector, (int)value);
+ ret = 0;
+ } else if (connector->funcs->set_property)
+ ret = connector->funcs->set_property(connector, property, value);
+
+ /* store the property value if successful */
+ if (!ret)
+ drm_object_property_set_value(&connector->base, property, value);
+ return ret;
+}
+
+static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
+ struct drm_property *property,
+ uint64_t value)
+{
+ int ret = -EINVAL;
+ struct drm_crtc *crtc = obj_to_crtc(obj);
+
+ if (crtc->funcs->set_property)
+ ret = crtc->funcs->set_property(crtc, property, value);
+ if (!ret)
+ drm_object_property_set_value(obj, property, value);
+
+ return ret;
+}
+
+/**
+ * drm_mode_plane_set_obj_prop - set the value of a property
+ * @plane: drm plane object to set property value for
+ * @property: property to set
+ * @value: value the property should be set to
+ *
+ * This functions sets a given property on a given plane object. This function
+ * calls the driver's ->set_property callback and changes the software state of
+ * the property if the callback succeeds.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
+ struct drm_property *property,
+ uint64_t value)
+{
+ int ret = -EINVAL;
+ struct drm_mode_object *obj = &plane->base;
+
+ if (plane->funcs->set_property)
+ ret = plane->funcs->set_property(plane, property, value);
+ if (!ret)
+ drm_object_property_set_value(obj, property, value);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
+
+/**
+ * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This function retrieves the current value for an object's property. Compared
+ * to the connector specific ioctl this one is extended to also work on crtc and
+ * plane objects.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_obj_get_properties *arg = data;
+ struct drm_mode_object *obj;
+ int ret = 0;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ drm_modeset_lock_all(dev);
+
+ obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
+ if (!obj) {
+ ret = -ENOENT;
+ goto out;
+ }
+ if (!obj->properties) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = get_properties(obj, file_priv->atomic,
+ (uint32_t __user *)(unsigned long)(arg->props_ptr),
+ (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
+ &arg->count_props);
+
+out:
+ drm_modeset_unlock_all(dev);
+ return ret;
+}
+
+/**
+ * drm_mode_obj_set_property_ioctl - set the current value of an object's property
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This function sets the current value for an object's property. It also calls
+ * into a driver's ->set_property callback to update the hardware state.
+ * Compared to the connector specific ioctl this one is extended to also work on
+ * crtc and plane objects.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_mode_obj_set_property *arg = data;
+ struct drm_mode_object *arg_obj;
+ struct drm_mode_object *prop_obj;
+ struct drm_property *property;
+ int i, ret = -EINVAL;
+ struct drm_mode_object *ref;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ drm_modeset_lock_all(dev);
+
+ arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
+ if (!arg_obj) {
+ ret = -ENOENT;
+ goto out;
+ }
+ if (!arg_obj->properties)
+ goto out;
+
+ for (i = 0; i < arg_obj->properties->count; i++)
+ if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
+ break;
+
+ if (i == arg_obj->properties->count)
+ goto out;
+
+ prop_obj = drm_mode_object_find(dev, arg->prop_id,
+ DRM_MODE_OBJECT_PROPERTY);
+ if (!prop_obj) {
+ ret = -ENOENT;
+ goto out;
+ }
+ property = obj_to_property(prop_obj);
+
+ if (!drm_property_change_valid_get(property, arg->value, &ref))
+ goto out;
+
+ switch (arg_obj->type) {
+ case DRM_MODE_OBJECT_CONNECTOR:
+ ret = drm_mode_connector_set_obj_prop(arg_obj, property,
+ arg->value);
+ break;
+ case DRM_MODE_OBJECT_CRTC:
+ ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
+ break;
+ case DRM_MODE_OBJECT_PLANE:
+ ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
+ property, arg->value);
+ break;
+ }
+
+ drm_property_change_valid_put(property, ref);
+
+out:
+ drm_modeset_unlock_all(dev);
+ return ret;
+}
+
+/**
+ * drm_mode_connector_attach_encoder - attach a connector to an encoder
+ * @connector: connector to attach
+ * @encoder: encoder to attach @connector to
+ *
+ * This function links up a connector to an encoder. Note that the routing
+ * restrictions between encoders and crtcs are exposed to userspace through the
+ * possible_clones and possible_crtcs bitmasks.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_connector_attach_encoder(struct drm_connector *connector,
+ struct drm_encoder *encoder)
+{
+ int i;
+
+ for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
+ if (connector->encoder_ids[i] == 0) {
+ connector->encoder_ids[i] = encoder->base.id;
+ return 0;
+ }
+ }
+ return -ENOMEM;
+}
+EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
+
+/**
+ * drm_mode_crtc_set_gamma_size - set the gamma table size
+ * @crtc: CRTC to set the gamma table size for
+ * @gamma_size: size of the gamma table
+ *
+ * Drivers which support gamma tables should set this to the supported gamma
+ * table size when initializing the CRTC. Currently the drm core only supports a
+ * fixed gamma table size.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
+ int gamma_size)
+{
+ crtc->gamma_size = gamma_size;
+
+ crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3,
+ GFP_KERNEL);
+ if (!crtc->gamma_store) {
+ crtc->gamma_size = 0;
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
+
+/**
+ * drm_mode_gamma_set_ioctl - set the gamma table
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
+ * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_gamma_set_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_crtc_lut *crtc_lut = data;
+ struct drm_crtc *crtc;
+ void *r_base, *g_base, *b_base;
+ int size;
+ int ret = 0;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ drm_modeset_lock_all(dev);
+ crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
+ if (!crtc) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ if (crtc->funcs->gamma_set == NULL) {
+ ret = -ENOSYS;
+ goto out;
+ }
+
+ /* memcpy into gamma store */
+ if (crtc_lut->gamma_size != crtc->gamma_size) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ size = crtc_lut->gamma_size * (sizeof(uint16_t));
+ r_base = crtc->gamma_store;
+ if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ g_base = r_base + size;
+ if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ b_base = g_base + size;
+ if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
+
+out:
+ drm_modeset_unlock_all(dev);
+ return ret;
+
+}
+
+/**
+ * drm_mode_gamma_get_ioctl - get the gamma table
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * Copy the current gamma table into the storage provided. This also provides
+ * the gamma table size the driver expects, which can be used to size the
+ * allocated storage.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_gamma_get_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_crtc_lut *crtc_lut = data;
+ struct drm_crtc *crtc;
+ void *r_base, *g_base, *b_base;
+ int size;
+ int ret = 0;
+
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
+ drm_modeset_lock_all(dev);
+ crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
+ if (!crtc) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ /* memcpy into gamma store */
+ if (crtc_lut->gamma_size != crtc->gamma_size) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ size = crtc_lut->gamma_size * (sizeof(uint16_t));
+ r_base = crtc->gamma_store;
+ if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ g_base = r_base + size;
+ if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ b_base = g_base + size;
+ if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
+ ret = -EFAULT;
+ goto out;
+ }
+out:
+ drm_modeset_unlock_all(dev);
+ return ret;
+}
+
+/**
+ * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This schedules an asynchronous update on a given CRTC, called page flip.
+ * Optionally a drm event is generated to signal the completion of the event.
+ * Generic drivers cannot assume that a pageflip with changed framebuffer
+ * properties (including driver specific metadata like tiling layout) will work,
+ * but some drivers support e.g. pixel format changes through the pageflip
+ * ioctl.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_page_flip_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_crtc_page_flip *page_flip = data;
+ struct drm_crtc *crtc;
+ struct drm_framebuffer *fb = NULL;
+ struct drm_pending_vblank_event *e = NULL;
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
+ page_flip->reserved != 0)
+ return -EINVAL;
+
+ if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
+ return -EINVAL;
+
+ crtc = drm_crtc_find(dev, page_flip->crtc_id);
+ if (!crtc)
+ return -ENOENT;
+
+ drm_modeset_lock_crtc(crtc, crtc->primary);
+ if (crtc->primary->fb == NULL) {
+ /* The framebuffer is currently unbound, presumably
+ * due to a hotplug event, that userspace has not
+ * yet discovered.
+ */
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (crtc->funcs->page_flip == NULL)
+ goto out;
+
+ fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
+ if (!fb) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
+ if (ret)
+ goto out;
+
+ if (crtc->primary->fb->pixel_format != fb->pixel_format) {
+ DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
+ ret = -ENOMEM;
+ spin_lock_irqsave(&dev->event_lock, flags);
+ if (file_priv->event_space < sizeof(e->event)) {
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ goto out;
+ }
+ file_priv->event_space -= sizeof(e->event);
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+
+ e = kzalloc(sizeof(*e), GFP_KERNEL);
+ if (e == NULL) {
+ spin_lock_irqsave(&dev->event_lock, flags);
+ file_priv->event_space += sizeof(e->event);
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ goto out;
+ }
+
+ e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
+ e->event.base.length = sizeof(e->event);
+ e->event.user_data = page_flip->user_data;
+ e->base.event = &e->event.base;
+ e->base.file_priv = file_priv;
+ e->base.destroy =
+ (void (*) (struct drm_pending_event *)) kfree;
+ }
+
+ crtc->primary->old_fb = crtc->primary->fb;
+ ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
+ if (ret) {
+ if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
+ spin_lock_irqsave(&dev->event_lock, flags);
+ file_priv->event_space += sizeof(e->event);
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ kfree(e);
+ }
+ /* Keep the old fb, don't unref it. */
+ crtc->primary->old_fb = NULL;
+ } else {
+ /*
+ * Warn if the driver hasn't properly updated the crtc->fb
+ * field to reflect that the new framebuffer is now used.
+ * Failing to do so will screw with the reference counting
+ * on framebuffers.
+ */
+ WARN_ON(crtc->primary->fb != fb);
+ /* Unref only the old framebuffer. */
+ fb = NULL;
+ }
+
+out:
+ if (fb)
+ drm_framebuffer_unreference(fb);
+ if (crtc->primary->old_fb)
+ drm_framebuffer_unreference(crtc->primary->old_fb);
+ crtc->primary->old_fb = NULL;
+ drm_modeset_unlock_crtc(crtc);
+
+ return ret;
+}
+
+/**
+ * drm_mode_config_reset - call ->reset callbacks
+ * @dev: drm device
+ *
+ * This functions calls all the crtc's, encoder's and connector's ->reset
+ * callback. Drivers can use this in e.g. their driver load or resume code to
+ * reset hardware and software state.
+ */
+void drm_mode_config_reset(struct drm_device *dev)
+{
+ struct drm_crtc *crtc;
+ struct drm_plane *plane;
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+
+ list_for_each_entry(plane, &dev->mode_config.plane_list, head)
+ if (plane->funcs->reset)
+ plane->funcs->reset(plane);
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+ if (crtc->funcs->reset)
+ crtc->funcs->reset(crtc);
+
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
+ if (encoder->funcs->reset)
+ encoder->funcs->reset(encoder);
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ connector->status = connector_status_unknown;
+
+ if (connector->funcs->reset)
+ connector->funcs->reset(connector);
+ }
+}
+EXPORT_SYMBOL(drm_mode_config_reset);
+
+/**
+ * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This creates a new dumb buffer in the driver's backing storage manager (GEM,
+ * TTM or something else entirely) and returns the resulting buffer handle. This
+ * handle can then be wrapped up into a framebuffer modeset object.
+ *
+ * Note that userspace is not allowed to use such objects for render
+ * acceleration - drivers must create their own private ioctls for such a use
+ * case.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_create_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_create_dumb *args = data;
+ u32 cpp, stride, size;
+
+ if (!dev->driver->dumb_create)
+ return -ENOSYS;
+ if (!args->width || !args->height || !args->bpp)
+ return -EINVAL;
+
+ /* overflow checks for 32bit size calculations */
+ /* NOTE: DIV_ROUND_UP() can overflow */
+ cpp = DIV_ROUND_UP(args->bpp, 8);
+ if (!cpp || cpp > 0xffffffffU / args->width)
+ return -EINVAL;
+ stride = cpp * args->width;
+ if (args->height > 0xffffffffU / stride)
+ return -EINVAL;
+
+ /* test for wrap-around */
+ size = args->height * stride;
+ if (PAGE_ALIGN(size) == 0)
+ return -EINVAL;
+
+ /*
+ * handle, pitch and size are output parameters. Zero them out to
+ * prevent drivers from accidentally using uninitialized data. Since
+ * not all existing userspace is clearing these fields properly we
+ * cannot reject IOCTL with garbage in them.
+ */
+ args->handle = 0;
+ args->pitch = 0;
+ args->size = 0;
+
+ return dev->driver->dumb_create(file_priv, dev, args);
+}
+
+/**
+ * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * Allocate an offset in the drm device node's address space to be able to
+ * memory map a dumb buffer.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_map_dumb *args = data;
+
+ /* call driver ioctl to get mmap offset */
+ if (!dev->driver->dumb_map_offset)
+ return -ENOSYS;
+
+ return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
+}
+
+/**
+ * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This destroys the userspace handle for the given dumb backing storage buffer.
+ * Since buffer objects must be reference counted in the kernel a buffer object
+ * won't be immediately freed if a framebuffer modeset object still uses it.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_destroy_dumb *args = data;
+
+ if (!dev->driver->dumb_destroy)
+ return -ENOSYS;
+
+ return dev->driver->dumb_destroy(file_priv, dev, args->handle);
+}
+
+/**
+ * drm_fb_get_bpp_depth - get the bpp/depth values for format
+ * @format: pixel format (DRM_FORMAT_*)
+ * @depth: storage for the depth value
+ * @bpp: storage for the bpp value
+ *
+ * This only supports RGB formats here for compat with code that doesn't use
+ * pixel formats directly yet.
+ */
+void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
+ int *bpp)
+{
+ switch (format) {
+ case DRM_FORMAT_C8:
+ case DRM_FORMAT_RGB332:
+ case DRM_FORMAT_BGR233:
+ *depth = 8;
+ *bpp = 8;
+ break;
+ case DRM_FORMAT_XRGB1555:
+ case DRM_FORMAT_XBGR1555:
+ case DRM_FORMAT_RGBX5551:
+ case DRM_FORMAT_BGRX5551:
+ case DRM_FORMAT_ARGB1555:
+ case DRM_FORMAT_ABGR1555:
+ case DRM_FORMAT_RGBA5551:
+ case DRM_FORMAT_BGRA5551:
+ *depth = 15;
+ *bpp = 16;
+ break;
+ case DRM_FORMAT_RGB565:
+ case DRM_FORMAT_BGR565:
+ *depth = 16;
+ *bpp = 16;
+ break;
+ case DRM_FORMAT_RGB888:
+ case DRM_FORMAT_BGR888:
+ *depth = 24;
+ *bpp = 24;
+ break;
+ case DRM_FORMAT_XRGB8888:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_RGBX8888:
+ case DRM_FORMAT_BGRX8888:
+ *depth = 24;
+ *bpp = 32;
+ break;
+ case DRM_FORMAT_XRGB2101010:
+ case DRM_FORMAT_XBGR2101010:
+ case DRM_FORMAT_RGBX1010102:
+ case DRM_FORMAT_BGRX1010102:
+ case DRM_FORMAT_ARGB2101010:
+ case DRM_FORMAT_ABGR2101010:
+ case DRM_FORMAT_RGBA1010102:
+ case DRM_FORMAT_BGRA1010102:
+ *depth = 30;
+ *bpp = 32;
+ break;
+ case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_ABGR8888:
+ case DRM_FORMAT_RGBA8888:
+ case DRM_FORMAT_BGRA8888:
+ *depth = 32;
+ *bpp = 32;
+ break;
+ default:
+ DRM_DEBUG_KMS("unsupported pixel format %s\n",
+ drm_get_format_name(format));
+ *depth = 0;
+ *bpp = 0;
+ break;
+ }
+}
+EXPORT_SYMBOL(drm_fb_get_bpp_depth);
+
+/**
+ * drm_format_num_planes - get the number of planes for format
+ * @format: pixel format (DRM_FORMAT_*)
+ *
+ * Returns:
+ * The number of planes used by the specified pixel format.
+ */
+int drm_format_num_planes(uint32_t format)
+{
+ switch (format) {
+ case DRM_FORMAT_YUV410:
+ case DRM_FORMAT_YVU410:
+ case DRM_FORMAT_YUV411:
+ case DRM_FORMAT_YVU411:
+ case DRM_FORMAT_YUV420:
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YUV422:
+ case DRM_FORMAT_YVU422:
+ case DRM_FORMAT_YUV444:
+ case DRM_FORMAT_YVU444:
+ return 3;
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ case DRM_FORMAT_NV16:
+ case DRM_FORMAT_NV61:
+ case DRM_FORMAT_NV24:
+ case DRM_FORMAT_NV42:
+ return 2;
+ default:
+ return 1;
+ }
+}
+EXPORT_SYMBOL(drm_format_num_planes);
+
+/**
+ * drm_format_plane_cpp - determine the bytes per pixel value
+ * @format: pixel format (DRM_FORMAT_*)
+ * @plane: plane index
+ *
+ * Returns:
+ * The bytes per pixel value for the specified plane.
+ */
+int drm_format_plane_cpp(uint32_t format, int plane)
+{
+ unsigned int depth;
+ int bpp;
+
+ if (plane >= drm_format_num_planes(format))
+ return 0;
+
+ switch (format) {
+ case DRM_FORMAT_YUYV:
+ case DRM_FORMAT_YVYU:
+ case DRM_FORMAT_UYVY:
+ case DRM_FORMAT_VYUY:
+ return 2;
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ case DRM_FORMAT_NV16:
+ case DRM_FORMAT_NV61:
+ case DRM_FORMAT_NV24:
+ case DRM_FORMAT_NV42:
+ return plane ? 2 : 1;
+ case DRM_FORMAT_YUV410:
+ case DRM_FORMAT_YVU410:
+ case DRM_FORMAT_YUV411:
+ case DRM_FORMAT_YVU411:
+ case DRM_FORMAT_YUV420:
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YUV422:
+ case DRM_FORMAT_YVU422:
+ case DRM_FORMAT_YUV444:
+ case DRM_FORMAT_YVU444:
+ return 1;
+ default:
+ drm_fb_get_bpp_depth(format, &depth, &bpp);
+ return bpp >> 3;
+ }
+}
+EXPORT_SYMBOL(drm_format_plane_cpp);
+
+/**
+ * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
+ * @format: pixel format (DRM_FORMAT_*)
+ *
+ * Returns:
+ * The horizontal chroma subsampling factor for the
+ * specified pixel format.
+ */
+int drm_format_horz_chroma_subsampling(uint32_t format)
+{
+ switch (format) {
+ case DRM_FORMAT_YUV411:
+ case DRM_FORMAT_YVU411:
+ case DRM_FORMAT_YUV410:
+ case DRM_FORMAT_YVU410:
+ return 4;
+ case DRM_FORMAT_YUYV:
+ case DRM_FORMAT_YVYU:
+ case DRM_FORMAT_UYVY:
+ case DRM_FORMAT_VYUY:
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ case DRM_FORMAT_NV16:
+ case DRM_FORMAT_NV61:
+ case DRM_FORMAT_YUV422:
+ case DRM_FORMAT_YVU422:
+ case DRM_FORMAT_YUV420:
+ case DRM_FORMAT_YVU420:
+ return 2;
+ default:
+ return 1;
+ }
+}
+EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
+
+/**
+ * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
+ * @format: pixel format (DRM_FORMAT_*)
+ *
+ * Returns:
+ * The vertical chroma subsampling factor for the
+ * specified pixel format.
+ */
+int drm_format_vert_chroma_subsampling(uint32_t format)
+{
+ switch (format) {
+ case DRM_FORMAT_YUV410:
+ case DRM_FORMAT_YVU410:
+ return 4;
+ case DRM_FORMAT_YUV420:
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ return 2;
+ default:
+ return 1;
+ }
+}
+EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
+
+/**
+ * drm_rotation_simplify() - Try to simplify the rotation
+ * @rotation: Rotation to be simplified
+ * @supported_rotations: Supported rotations
+ *
+ * Attempt to simplify the rotation to a form that is supported.
+ * Eg. if the hardware supports everything except DRM_REFLECT_X
+ * one could call this function like this:
+ *
+ * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) |
+ * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) |
+ * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y));
+ *
+ * to eliminate the DRM_ROTATE_X flag. Depending on what kind of
+ * transforms the hardware supports, this function may not
+ * be able to produce a supported transform, so the caller should
+ * check the result afterwards.
+ */
+unsigned int drm_rotation_simplify(unsigned int rotation,
+ unsigned int supported_rotations)
+{
+ if (rotation & ~supported_rotations) {
+ rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y);
+ rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4);
+ }
+
+ return rotation;
+}
+EXPORT_SYMBOL(drm_rotation_simplify);
+
+/**
+ * drm_mode_config_init - initialize DRM mode_configuration structure
+ * @dev: DRM device
+ *
+ * Initialize @dev's mode_config structure, used for tracking the graphics
+ * configuration of @dev.
+ *
+ * Since this initializes the modeset locks, no locking is possible. Which is no
+ * problem, since this should happen single threaded at init time. It is the
+ * driver's problem to ensure this guarantee.
+ *
+ */
+void drm_mode_config_init(struct drm_device *dev)
+{
+ mutex_init(&dev->mode_config.mutex);
+ drm_modeset_lock_init(&dev->mode_config.connection_mutex);
+ mutex_init(&dev->mode_config.idr_mutex);
+ mutex_init(&dev->mode_config.fb_lock);
+ INIT_LIST_HEAD(&dev->mode_config.fb_list);
+ INIT_LIST_HEAD(&dev->mode_config.crtc_list);
+ INIT_LIST_HEAD(&dev->mode_config.connector_list);
+ INIT_LIST_HEAD(&dev->mode_config.encoder_list);
+ INIT_LIST_HEAD(&dev->mode_config.property_list);
+ INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
+ INIT_LIST_HEAD(&dev->mode_config.plane_list);
+ idr_init(&dev->mode_config.crtc_idr);
+ idr_init(&dev->mode_config.tile_idr);
+
+ drm_modeset_lock_all(dev);
+ drm_mode_create_standard_properties(dev);
+ drm_modeset_unlock_all(dev);
+
+ /* Just to be sure */
+ dev->mode_config.num_fb = 0;
+ dev->mode_config.num_connector = 0;
+ dev->mode_config.num_crtc = 0;
+ dev->mode_config.num_encoder = 0;
+ dev->mode_config.num_overlay_plane = 0;
+ dev->mode_config.num_total_plane = 0;
+}
+EXPORT_SYMBOL(drm_mode_config_init);
+
+/**
+ * drm_mode_config_cleanup - free up DRM mode_config info
+ * @dev: DRM device
+ *
+ * Free up all the connectors and CRTCs associated with this DRM device, then
+ * free up the framebuffers and associated buffer objects.
+ *
+ * Note that since this /should/ happen single-threaded at driver/device
+ * teardown time, no locking is required. It's the driver's job to ensure that
+ * this guarantee actually holds true.
+ *
+ * FIXME: cleanup any dangling user buffer objects too
+ */
+void drm_mode_config_cleanup(struct drm_device *dev)
+{
+ struct drm_connector *connector, *ot;
+ struct drm_crtc *crtc, *ct;
+ struct drm_encoder *encoder, *enct;
+ struct drm_framebuffer *fb, *fbt;
+ struct drm_property *property, *pt;
+ struct drm_property_blob *blob, *bt;
+ struct drm_plane *plane, *plt;
+
+ list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
+ head) {
+ encoder->funcs->destroy(encoder);
+ }
+
+ list_for_each_entry_safe(connector, ot,
+ &dev->mode_config.connector_list, head) {
+ connector->funcs->destroy(connector);
+ }
+
+ list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
+ head) {
+ drm_property_destroy(dev, property);
+ }
+
+ list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
+ head) {
+ drm_property_destroy_blob(dev, blob);
+ }
+
+ /*
+ * Single-threaded teardown context, so it's not required to grab the
+ * fb_lock to protect against concurrent fb_list access. Contrary, it
+ * would actually deadlock with the drm_framebuffer_cleanup function.
+ *
+ * Also, if there are any framebuffers left, that's a driver leak now,
+ * so politely WARN about this.
+ */
+ WARN_ON(!list_empty(&dev->mode_config.fb_list));
+ list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
+ drm_framebuffer_remove(fb);
+ }
+
+ list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
+ head) {
+ plane->funcs->destroy(plane);
+ }
+
+ list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
+ crtc->funcs->destroy(crtc);
+ }
+
+ idr_destroy(&dev->mode_config.tile_idr);
+ idr_destroy(&dev->mode_config.crtc_idr);
+ drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
+}
+EXPORT_SYMBOL(drm_mode_config_cleanup);
+
+struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
+ unsigned int supported_rotations)
+{
+ static const struct drm_prop_enum_list props[] = {
+ { DRM_ROTATE_0, "rotate-0" },
+ { DRM_ROTATE_90, "rotate-90" },
+ { DRM_ROTATE_180, "rotate-180" },
+ { DRM_ROTATE_270, "rotate-270" },
+ { DRM_REFLECT_X, "reflect-x" },
+ { DRM_REFLECT_Y, "reflect-y" },
+ };
+
+ return drm_property_create_bitmask(dev, 0, "rotation",
+ props, ARRAY_SIZE(props),
+ supported_rotations);
+}
+EXPORT_SYMBOL(drm_mode_create_rotation_property);
+
+/**
+ * DOC: Tile group
+ *
+ * Tile groups are used to represent tiled monitors with a unique
+ * integer identifier. Tiled monitors using DisplayID v1.3 have
+ * a unique 8-byte handle, we store this in a tile group, so we
+ * have a common identifier for all tiles in a monitor group.
+ */
+static void drm_tile_group_free(struct kref *kref)
+{
+ struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
+ struct drm_device *dev = tg->dev;
+ mutex_lock(&dev->mode_config.idr_mutex);
+ idr_remove(&dev->mode_config.tile_idr, tg->id);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+ kfree(tg);
+}
+
+/**
+ * drm_mode_put_tile_group - drop a reference to a tile group.
+ * @dev: DRM device
+ * @tg: tile group to drop reference to.
+ *
+ * drop reference to tile group and free if 0.
+ */
+void drm_mode_put_tile_group(struct drm_device *dev,
+ struct drm_tile_group *tg)
+{
+ kref_put(&tg->refcount, drm_tile_group_free);
+}
+
+/**
+ * drm_mode_get_tile_group - get a reference to an existing tile group
+ * @dev: DRM device
+ * @topology: 8-bytes unique per monitor.
+ *
+ * Use the unique bytes to get a reference to an existing tile group.
+ *
+ * RETURNS:
+ * tile group or NULL if not found.
+ */
+struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
+ char topology[8])
+{
+ struct drm_tile_group *tg;
+ int id;
+ mutex_lock(&dev->mode_config.idr_mutex);
+ idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
+ if (!memcmp(tg->group_data, topology, 8)) {
+ if (!kref_get_unless_zero(&tg->refcount))
+ tg = NULL;
+ mutex_unlock(&dev->mode_config.idr_mutex);
+ return tg;
+ }
+ }
+ mutex_unlock(&dev->mode_config.idr_mutex);
+ return NULL;
+}
+EXPORT_SYMBOL(drm_mode_get_tile_group);
+
+/**
+ * drm_mode_create_tile_group - create a tile group from a displayid description
+ * @dev: DRM device
+ * @topology: 8-bytes unique per monitor.
+ *
+ * Create a tile group for the unique monitor, and get a unique
+ * identifier for the tile group.
+ *
+ * RETURNS:
+ * new tile group or error.
+ */
+struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
+ char topology[8])
+{
+ struct drm_tile_group *tg;
+ int ret;
+
+ tg = kzalloc(sizeof(*tg), GFP_KERNEL);
+ if (!tg)
+ return ERR_PTR(-ENOMEM);
+
+ kref_init(&tg->refcount);
+ memcpy(tg->group_data, topology, 8);
+ tg->dev = dev;
+
+ mutex_lock(&dev->mode_config.idr_mutex);
+ ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
+ if (ret >= 0) {
+ tg->id = ret;
+ } else {
+ kfree(tg);
+ tg = ERR_PTR(ret);
+ }
+
+ mutex_unlock(&dev->mode_config.idr_mutex);
+ return tg;
+}
+EXPORT_SYMBOL(drm_mode_create_tile_group);
Code Review / kvmfornfv.git / blobdiff