diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_cma_helper.c')
-rw-r--r-- | drivers/gpu/drm/drm_fb_cma_helper.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c index fc2b42dd3dc6..b07ab3f613e0 100644 --- a/drivers/gpu/drm/drm_fb_cma_helper.c +++ b/drivers/gpu/drm/drm_fb_cma_helper.c @@ -72,7 +72,9 @@ struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb, EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_obj); /** - * drm_fb_cma_get_gem_addr() - Get physical address for framebuffer + * drm_fb_cma_get_gem_addr() - Get physical address for framebuffer, for pixel + * formats where values are grouped in blocks this will get you the beginning of + * the block * @fb: The framebuffer * @state: Which state of drm plane * @plane: Which plane @@ -87,6 +89,13 @@ dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb, struct drm_gem_cma_object *obj; dma_addr_t paddr; u8 h_div = 1, v_div = 1; + u32 block_w = drm_format_info_block_width(fb->format, plane); + u32 block_h = drm_format_info_block_height(fb->format, plane); + u32 block_size = fb->format->char_per_block[plane]; + u32 sample_x; + u32 sample_y; + u32 block_start_y; + u32 num_hblocks; obj = drm_fb_cma_get_gem_obj(fb, plane); if (!obj) @@ -99,8 +108,13 @@ dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb, v_div = fb->format->vsub; } - paddr += (fb->format->cpp[plane] * (state->src_x >> 16)) / h_div; - paddr += (fb->pitches[plane] * (state->src_y >> 16)) / v_div; + sample_x = (state->src_x >> 16) / h_div; + sample_y = (state->src_y >> 16) / v_div; + block_start_y = (sample_y / block_h) * block_h; + num_hblocks = sample_x / block_w; + + paddr += fb->pitches[plane] * block_start_y; + paddr += block_size * num_hblocks; return paddr; } |