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drm/exynos: mixer: fix chroma comment in vp_video_buffer()

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The current comment sounds like the division op 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>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Tobias Jakobi 2017-08-22 16:19:36 +02:00 committed by Inki Dae
parent 88a5e22a90
commit dc500cfb86
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/exynos/exynos_mixer.c
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@ -532,7 +532,7 @@ 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 */
/* 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));