minigbm: add bytes per pixel function

We were using the drv_stride_from_format as a shorthand to calculate
bytes per pixel. This is incorrect with the addition of
DRM_FORMAT_YVU420_ANDROID, which always aligns to 16 bytes.

Let's have a separate bytes_per_pixel function to better express what
we want.

BUG=chromium:616275
TEST=android.media.cts.DecodeAccuracyTest
     #testVP9GLViewLargerHeightVideoDecode

passes on veyron_minnie-cheets.

Change-Id: I2d740828d66031c3a032932c09d79dbce21b8986
Reviewed-on: https://chromium-review.googlesource.com/458978
Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drv.h b/drv.h
index 6863dfa..42bc2ce 100644
--- a/drv.h
+++ b/drv.h
@@ -162,13 +162,13 @@ drv_bo_get_format(struct bo *bo);
 uint32_t
 drv_resolve_format(struct driver *drv, uint32_t format);
 
-int
-drv_stride_from_format(uint32_t format, uint32_t width, size_t plane);
-
 size_t
 drv_num_planes_from_format(uint32_t format);
 
 uint32_t
+drv_bytes_per_pixel(uint32_t format, size_t plane);
+
+uint32_t
 drv_size_from_format(uint32_t format, uint32_t stride, uint32_t height,
 		     size_t plane);