struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
struct drm_file *file,
struct drm_mode_fb_cmd2 *cmd)
{
unsigned int hsub, vsub, i;
struct mtk_drm_fb *mtk_fb;
struct drm_gem_object *gem[MAX_FB_OBJ];
int err;
hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
unsigned int width = cmd->width / (i ? hsub : 1);
unsigned int height = cmd->height / (i ? vsub : 1);
unsigned int size, bpp;
gem[i] = drm_gem_object_lookup(dev, file, cmd->handles[i]);
if (!gem[i]) {
err = -ENOENT;
goto unreference;
}
bpp = drm_format_plane_cpp(cmd->pixel_format, i);
size = (height - 1) * cmd->pitches[i] + width * bpp;
size += cmd->offsets[i];
if (gem[i]->size < size) {
err = -EINVAL;
goto unreference;
}
}
mtk_fb = mtk_drm_framebuffer_init(dev, cmd, gem);
return &mtk_fb->base;
unreference:
while (i--)
drm_gem_object_unreference_unlocked(gem[i]);
return ERR_PTR(err);
}
struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *cmd)
{
struct mtk_drm_fb *mtk_fb;
struct drm_gem_object *gem;
unsigned int width = cmd->width;
unsigned int height = cmd->height;
unsigned int size, bpp;
int ret;
if (drm_format_num_planes(cmd->pixel_format) != 1)
return ERR_PTR(-EINVAL);
gem = drm_gem_object_lookup(file, cmd->handles[0]);
if (!gem)
return ERR_PTR(-ENOENT);
bpp = drm_format_plane_cpp(cmd->pixel_format, 0);
size = (height - 1) * cmd->pitches[0] + width * bpp;
size += cmd->offsets[0];
if (gem->size < size) {
ret = -EINVAL;
goto unreference;
}
mtk_fb = mtk_drm_framebuffer_init(dev, cmd, gem);
if (IS_ERR(mtk_fb)) {
ret = PTR_ERR(mtk_fb);
goto unreference;
}
return &mtk_fb->base;
unreference:
drm_gem_object_unreference_unlocked(gem);
return ERR_PTR(ret);
}
static int mtk_fbdev_probe(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_device *dev = helper->dev;
struct drm_mode_fb_cmd2 mode = { 0 };
struct mtk_drm_fb *mtk_fb;
struct mtk_drm_gem_obj *mtk_gem;
struct drm_gem_object *gem;
struct fb_info *info;
struct drm_framebuffer *fb;
unsigned long offset;
size_t size;
int err;
mode.width = sizes->surface_width;
mode.height = sizes->surface_height;
mode.pitches[0] = sizes->surface_width * ((sizes->surface_bpp + 7) / 8);
mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
mode.height = mode.height;/* << 1; for fb use? */
size = mode.pitches[0] * mode.height;
dev_info(dev->dev, "mtk_fbdev_probe %dx%d bpp %d pitch %d size %zu\n",
mode.width, mode.height, sizes->surface_bpp, mode.pitches[0],
size);
mtk_gem = mtk_drm_gem_create(dev, size, true);
if (IS_ERR(mtk_gem)) {
err = PTR_ERR(mtk_gem);
goto fini;
}
gem = &mtk_gem->base;
mtk_fb = mtk_drm_framebuffer_init(dev, &mode, &gem);
if (IS_ERR(mtk_fb)) {
dev_err(dev->dev, "failed to allocate DRM framebuffer\n");
err = PTR_ERR(mtk_fb);
goto free;
}
fb = &mtk_fb->base;
info = framebuffer_alloc(0, dev->dev);
if (!info) {
dev_err(dev->dev, "failed to allocate framebuffer info\n");
err = PTR_ERR(info);
goto release;
}
helper->fb = fb;
helper->fbdev = info;
info->par = helper;
info->flags = FBINFO_FLAG_DEFAULT;
info->fbops = &mediatek_fb_ops;
err = fb_alloc_cmap(&info->cmap, 256, 0);
if (err < 0) {
dev_err(dev->dev, "failed to allocate color map: %d\n", err);
goto destroy;
}
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
offset = info->var.xoffset * (fb->bits_per_pixel + 7) / 8;
offset += info->var.yoffset * fb->pitches[0];
strcpy(info->fix.id, "mtk");
/* dev->mode_config.fb_base = (resource_size_t)bo->paddr; */
info->var.yres = info->var.yres_virtual;/* >> 1; for fb use? */
info->fix.smem_start = mtk_gem->dma_addr + offset;
info->fix.smem_len = size;
info->screen_base = mtk_gem->kvaddr + offset;
info->screen_size = size;
return 0;
destroy:
drm_framebuffer_unregister_private(fb);
mtk_drm_fb_destroy(fb);
release:
framebuffer_release(info);
free:
mtk_drm_gem_free_object(&mtk_gem->base);
fini:
dev_err(dev->dev, "mtk_fbdev_probe fail\n");
return err;
}
