Re: [igt-dev] [PATCH i-g-t] [i-g-t] tests/kms_plane_scaling: fb height to be multiplier of 4 for YUV 420 planar

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Fri, Mar 16, 2018 at 06:50:27PM +0530, Vidya Srinivas wrote:
> For Gen9, GLK, CNL, GLV: Display WA 1106:
> Display corruption/color shift observed when using NV12 with
> 270 rotation or 90 rotation + horizontal flip.
> WA: NV12 with 270 rotation or 90 rotation + horizontal flip requires
> the programmed plane height to be a multiple of 4.
> Patch changes the NV12 buffer to 20x20 to maintain both
> fb > min fb and also multiplier of 4
> 
> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
> Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com>
> ---
>  tests/kms_plane_scaling.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tests/kms_plane_scaling.c b/tests/kms_plane_scaling.c
> index 36fcfc0..b94d785 100644
> --- a/tests/kms_plane_scaling.c
> +++ b/tests/kms_plane_scaling.c
> @@ -132,7 +132,7 @@ static void check_scaling_pipe_plane_rot(data_t *d, igt_plane_t *plane,
>  	/* create buffer in the range of  min and max source side limit.*/
>  	width = height = 9;
>  	if (pixel_format == DRM_FORMAT_NV12)
> -		width = height = 17;
> +		width = height = 20;

Why 20 and not 16? I thought 16 was the limit?

>  	igt_create_color_fb(display->drm_fd, width, height,
>  		       pixel_format, tiling, 0.0, 1.0, 0.0, &d->fb[0]);
>  	igt_plane_set_fb(plane, &d->fb[0]);
> -- 
> 2.7.4
> 
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-- 
Ville Syrjälä
Intel OTC
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