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drm/imx: ipuv3-plane: make sure x/y offsets are even in case of chroma subsampling

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Odd x/y offsets are not allowed for horizontally/vertically chroma
subsampled planar YUV formats.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Liu Ying <gnuiyl@gmail.com>
This commit is contained in:
Philipp Zabel 2016-10-18 12:30:36 +02:00
parent e73aca5184
commit 5fb57ab328
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/imx/ipuv3-plane.c
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@ -259,6 +259,7 @@ static int ipu_plane_atomic_check(struct drm_plane *plane,
struct drm_framebuffer *fb = state->fb;
struct drm_framebuffer *old_fb = old_state->fb;
unsigned long eba, ubo, vbo, old_ubo, old_vbo;
int hsub, vsub;
/* Ok to disable */
if (!fb)
@ -372,6 +373,16 @@ static int ipu_plane_atomic_check(struct drm_plane *plane,
if (old_fb && old_fb->pitches[1] != fb->pitches[1])
crtc_state->mode_changed = true;
/*
* The x/y offsets must be even in case of horizontal/vertical
* chroma subsampling.
*/
hsub = drm_format_horz_chroma_subsampling(fb->pixel_format);
vsub = drm_format_vert_chroma_subsampling(fb->pixel_format);
if (((state->src_x >> 16) & (hsub - 1)) ||
((state->src_y >> 16) & (vsub - 1)))
return -EINVAL;
}
return 0;