Re: [PATCH 8/8] drm/i915: Add NV12 support to intel_framebuffer_init

Clint Taylor
2017-07-06T22:55:14Z

On 06/19/2017 11:10 PM, Vidya Srinivas wrote:
> From: Chandra Konduru <chandra.konduru@intel.com>
>
> This patch adds NV12 as supported format
> to intel_framebuffer_init and performs various checks.
>
> v2:
> -Fix an issue in checks added (Chandra Konduru)
>
> v3: rebased (me)
>
> v4: Review comments by Ville addressed
> Added platform check for NV12 in intel_framebuffer_init
> Removed offset checks for NV12 case
>
> Signed-off-by: Chandra Konduru <chandra.konduru@intel.com>
> Signed-off-by: Nabendu Maiti <nabendu.bikash.maiti@intel.com>
> Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 83b20fd..56fd9ae 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -14765,6 +14765,10 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
> goto err;
> }
> break;
> + case DRM_FORMAT_NV12:
> + if (INTEL_GEN(dev_priv) >= 9)
> + break;
> + goto err;
This NV12 support only correctly works on SKL. Plane color space
conversion is different on GLK and later platforms causing the colors to
display incorrectly. Ville's plane color space property patch series in
review will fix this issue.

Tested-by: Clinton Taylor <clinton.a.taylor@intel.com>
Reviewed-by: Clinton Taylor <clinton.a.taylor@intel.com>

-Clint

> default:
> DRM_DEBUG_KMS("unsupported pixel format: %s\n",
> drm_get_format_name(mode_cmd->pixel_format, &format_name));