Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / udl / udl_connector.c

diff --git a/kernel/drivers/gpu/drm/udl/udl_connector.c b/kernel/drivers/gpu/drm/udl/udl_connector.c
new file mode 100644 (file)
index 0000000..0110d95
--- /dev/null
+++ b/kernel/drivers/gpu/drm/udl/udl_connector.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2012 Red Hat
+ * based in parts on udlfb.c:
+ * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
+ * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
+ * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License v2. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_crtc_helper.h>
+#include "udl_drv.h"
+
+/* dummy connector to just get EDID,
+   all UDL appear to have a DVI-D */
+
+static u8 *udl_get_edid(struct udl_device *udl)
+{
+       u8 *block;
+       char *rbuf;
+       int ret, i;
+
+       block = kmalloc(EDID_LENGTH, GFP_KERNEL);
+       if (block == NULL)
+               return NULL;
+
+       rbuf = kmalloc(2, GFP_KERNEL);
+       if (rbuf == NULL)
+               goto error;
+
+       for (i = 0; i < EDID_LENGTH; i++) {
+               ret = usb_control_msg(udl->udev,
+                                     usb_rcvctrlpipe(udl->udev, 0), (0x02),
+                                     (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2,
+                                     HZ);
+               if (ret < 1) {
+                       DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
+                       goto error;
+               }
+               block[i] = rbuf[1];
+       }
+
+       kfree(rbuf);
+       return block;
+
+error:
+       kfree(block);
+       kfree(rbuf);
+       return NULL;
+}
+
+static int udl_get_modes(struct drm_connector *connector)
+{
+       struct udl_device *udl = connector->dev->dev_private;
+       struct edid *edid;
+       int ret;
+
+       edid = (struct edid *)udl_get_edid(udl);
+       if (!edid) {
+               drm_mode_connector_update_edid_property(connector, NULL);
+               return 0;
+       }
+
+       /*
+        * We only read the main block, but if the monitor reports extension
+        * blocks then the drm edid code expects them to be present, so patch
+        * the extension count to 0.
+        */
+       edid->checksum += edid->extensions;
+       edid->extensions = 0;
+
+       drm_mode_connector_update_edid_property(connector, edid);
+       ret = drm_add_edid_modes(connector, edid);
+       kfree(edid);
+       return ret;
+}
+
+static int udl_mode_valid(struct drm_connector *connector,
+                         struct drm_display_mode *mode)
+{
+       struct udl_device *udl = connector->dev->dev_private;
+       if (!udl->sku_pixel_limit)
+               return 0;
+
+       if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
+               return MODE_VIRTUAL_Y;
+
+       return 0;
+}
+
+static enum drm_connector_status
+udl_detect(struct drm_connector *connector, bool force)
+{
+       if (drm_device_is_unplugged(connector->dev))
+               return connector_status_disconnected;
+       return connector_status_connected;
+}
+
+static struct drm_encoder*
+udl_best_single_encoder(struct drm_connector *connector)
+{
+       int enc_id = connector->encoder_ids[0];
+       return drm_encoder_find(connector->dev, enc_id);
+}
+
+static int udl_connector_set_property(struct drm_connector *connector,
+                                     struct drm_property *property,
+                                     uint64_t val)
+{
+       return 0;
+}
+
+static void udl_connector_destroy(struct drm_connector *connector)
+{
+       drm_connector_unregister(connector);
+       drm_connector_cleanup(connector);
+       kfree(connector);
+}
+
+static struct drm_connector_helper_funcs udl_connector_helper_funcs = {
+       .get_modes = udl_get_modes,
+       .mode_valid = udl_mode_valid,
+       .best_encoder = udl_best_single_encoder,
+};
+
+static struct drm_connector_funcs udl_connector_funcs = {
+       .dpms = drm_helper_connector_dpms,
+       .detect = udl_detect,
+       .fill_modes = drm_helper_probe_single_connector_modes,
+       .destroy = udl_connector_destroy,
+       .set_property = udl_connector_set_property,
+};
+
+int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder)
+{
+       struct drm_connector *connector;
+
+       connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL);
+       if (!connector)
+               return -ENOMEM;
+
+       drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_DVII);
+       drm_connector_helper_add(connector, &udl_connector_helper_funcs);
+
+       drm_connector_register(connector);
+       drm_mode_connector_attach_encoder(connector, encoder);
+
+       drm_object_attach_property(&connector->base,
+                                     dev->mode_config.dirty_info_property,
+                                     1);
+       return 0;
+}