--- /dev/null
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:Mark Yao <mark.yao@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <drm/drm.h>
+#include <drm/drmP.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_gem.h"
+
+#define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb)
+
+struct rockchip_drm_fb {
+ struct drm_framebuffer fb;
+ struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER];
+};
+
+struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb,
+ unsigned int plane)
+{
+ struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb);
+
+ if (plane >= ROCKCHIP_MAX_FB_BUFFER)
+ return NULL;
+
+ return rk_fb->obj[plane];
+}
+EXPORT_SYMBOL_GPL(rockchip_fb_get_gem_obj);
+
+static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb)
+{
+ struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
+ struct drm_gem_object *obj;
+ int i;
+
+ for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) {
+ obj = rockchip_fb->obj[i];
+ if (obj)
+ drm_gem_object_unreference_unlocked(obj);
+ }
+
+ drm_framebuffer_cleanup(fb);
+ kfree(rockchip_fb);
+}
+
+static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb,
+ struct drm_file *file_priv,
+ unsigned int *handle)
+{
+ struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
+
+ return drm_gem_handle_create(file_priv,
+ rockchip_fb->obj[0], handle);
+}
+
+static struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
+ .destroy = rockchip_drm_fb_destroy,
+ .create_handle = rockchip_drm_fb_create_handle,
+};
+
+static struct rockchip_drm_fb *
+rockchip_fb_alloc(struct drm_device *dev, struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object **obj, unsigned int num_planes)
+{
+ struct rockchip_drm_fb *rockchip_fb;
+ int ret;
+ int i;
+
+ rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL);
+ if (!rockchip_fb)
+ return ERR_PTR(-ENOMEM);
+
+ drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd);
+
+ for (i = 0; i < num_planes; i++)
+ rockchip_fb->obj[i] = obj[i];
+
+ ret = drm_framebuffer_init(dev, &rockchip_fb->fb,
+ &rockchip_drm_fb_funcs);
+ if (ret) {
+ dev_err(dev->dev, "Failed to initialize framebuffer: %d\n",
+ ret);
+ kfree(rockchip_fb);
+ return ERR_PTR(ret);
+ }
+
+ return rockchip_fb;
+}
+
+static struct drm_framebuffer *
+rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
+ struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ struct rockchip_drm_fb *rockchip_fb;
+ struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER];
+ struct drm_gem_object *obj;
+ unsigned int hsub;
+ unsigned int vsub;
+ int num_planes;
+ int ret;
+ int i;
+
+ hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
+ vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
+ num_planes = min(drm_format_num_planes(mode_cmd->pixel_format),
+ ROCKCHIP_MAX_FB_BUFFER);
+
+ for (i = 0; i < num_planes; i++) {
+ unsigned int width = mode_cmd->width / (i ? hsub : 1);
+ unsigned int height = mode_cmd->height / (i ? vsub : 1);
+ unsigned int min_size;
+
+ obj = drm_gem_object_lookup(dev, file_priv,
+ mode_cmd->handles[i]);
+ if (!obj) {
+ dev_err(dev->dev, "Failed to lookup GEM object\n");
+ ret = -ENXIO;
+ goto err_gem_object_unreference;
+ }
+
+ min_size = (height - 1) * mode_cmd->pitches[i] +
+ mode_cmd->offsets[i] +
+ width * drm_format_plane_cpp(mode_cmd->pixel_format, i);
+
+ if (obj->size < min_size) {
+ drm_gem_object_unreference_unlocked(obj);
+ ret = -EINVAL;
+ goto err_gem_object_unreference;
+ }
+ objs[i] = obj;
+ }
+
+ rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i);
+ if (IS_ERR(rockchip_fb)) {
+ ret = PTR_ERR(rockchip_fb);
+ goto err_gem_object_unreference;
+ }
+
+ return &rockchip_fb->fb;
+
+err_gem_object_unreference:
+ for (i--; i >= 0; i--)
+ drm_gem_object_unreference_unlocked(objs[i]);
+ return ERR_PTR(ret);
+}
+
+static void rockchip_drm_output_poll_changed(struct drm_device *dev)
+{
+ struct rockchip_drm_private *private = dev->dev_private;
+ struct drm_fb_helper *fb_helper = &private->fbdev_helper;
+
+ drm_fb_helper_hotplug_event(fb_helper);
+}
+
+static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
+ .fb_create = rockchip_user_fb_create,
+ .output_poll_changed = rockchip_drm_output_poll_changed,
+};
+
+struct drm_framebuffer *
+rockchip_drm_framebuffer_init(struct drm_device *dev,
+ struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object *obj)
+{
+ struct rockchip_drm_fb *rockchip_fb;
+
+ rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
+ if (IS_ERR(rockchip_fb))
+ return NULL;
+
+ return &rockchip_fb->fb;
+}
+
+void rockchip_drm_mode_config_init(struct drm_device *dev)
+{
+ dev->mode_config.min_width = 0;
+ dev->mode_config.min_height = 0;
+
+ /*
+ * set max width and height as default value(4096x4096).
+ * this value would be used to check framebuffer size limitation
+ * at drm_mode_addfb().
+ */
+ dev->mode_config.max_width = 4096;
+ dev->mode_config.max_height = 4096;
+
+ dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
+}
Code Review / kvmfornfv.git / blobdiff