diff mbox

[RFC,v2,05/10] drm: fb_cma_helper: Use drm_format_plane_width_bytes()

Message ID 1516932247-10750-6-git-send-email-hyun.kwon@xilinx.com (mailing list archive)
State New, archived
Headers show

Commit Message

Hyun Kwon Jan. 26, 2018, 2:04 a.m. UTC 
In order to handle non byte aligned formats, use
drm_format_plane_width_bytes(). Use of 'cpp' can result in
incorrect number of bytes from bit level rounding.

Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com>
---
v2
- This patch is added.
---
---
 drivers/gpu/drm/drm_fb_cma_helper.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index 186d00a..271175e 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -124,7 +124,8 @@  dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb,
 		return 0;
 
 	paddr = obj->paddr + fb->offsets[plane];
-	paddr += fb->format->cpp[plane] * (state->src_x >> 16);
+	paddr += drm_format_plane_width_bytes(fb->format, plane,
+					      state->src_x >> 16);
 	paddr += fb->pitches[plane] * (state->src_y >> 16);
 
 	return paddr;