| Message ID | 1491314581-18086-2-git-send-email-tjakobi@math.uni-bielefeld.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 9648dd5..77f18f6 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -533,7 +533,7 @@ static void vp_video_buffer(struct mixer_context *ctx, /* setting size of input image */ vp_reg_write(res, VP_IMG_SIZE_Y, VP_IMG_HSIZE(fb->pitches[0]) | VP_IMG_VSIZE(fb->height)); - /* chroma height has to reduced by 2 to avoid chroma distorions */ + /* the chroma plane for NV12/NV21 is half the height of the luma plane */ vp_reg_write(res, VP_IMG_SIZE_C, VP_IMG_HSIZE(fb->pitches[0]) | VP_IMG_VSIZE(fb->height / 2));
The current comment sounds like the division is done to compensate for some hardware erratum. But the chroma plane having half the height of the luma plane is just the way NV12/NV21 is defined, so clarify this behaviour. Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> --- drivers/gpu/drm/exynos/exynos_mixer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)