[Intel-gfx] [PATCH v7 2/2] drm/i915: Adding YUV444 packed format(DRM_FORMAT_XYUV) support.

[Ville Syrjälä]

On Wed, Aug 29, 2018 at 02:28:47PM +0300, Stanislav Lisovskiy wrote:
> PLANE_CTL_FORMAT_AYUV is already supported, according to hardware
> specification.
> 
> v2: Edited commit message, removed redundant whitespaces.
> 
> v3: Fixed fallthrough logic for the format switch cases.
> 
> v4: Yet again fixed fallthrough logic, to reuse code from other case
>     labels.
> 
> v5: Started to use XYUV instead of AYUV, as we don't use alpha.
> 
> v6: Removed unneeded initializer for new XYUV format.
> 
> v7: Added scaling support for DRM_FORMAT_XYUV
> 
> Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 8 ++++++++
>  drivers/gpu/drm/i915/intel_sprite.c  | 1 +
>  2 files changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 30fdfd1a3037..3c96fa3a2b61 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -86,6 +86,7 @@ static const uint32_t skl_primary_formats[] = {
>  	DRM_FORMAT_YVYU,
>  	DRM_FORMAT_UYVY,
>  	DRM_FORMAT_VYUY,
> +	DRM_FORMAT_XYUV,
>  };
>  
>  static const uint32_t skl_pri_planar_formats[] = {
> @@ -102,6 +103,7 @@ static const uint32_t skl_pri_planar_formats[] = {
>  	DRM_FORMAT_UYVY,
>  	DRM_FORMAT_VYUY,
>  	DRM_FORMAT_NV12,
> +	DRM_FORMAT_XYUV,

I would keep the NV12 at the end so that the arrays are easier to
compare visually.

>  };
>  
>  static const uint64_t skl_format_modifiers_noccs[] = {
> @@ -3501,6 +3503,8 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
>  		return PLANE_CTL_FORMAT_XRGB_2101010;
>  	case DRM_FORMAT_XBGR2101010:
>  		return PLANE_CTL_ORDER_RGBX | PLANE_CTL_FORMAT_XRGB_2101010;
> +	case DRM_FORMAT_XYUV:
> +		return PLANE_CTL_FORMAT_AYUV;

We should probably rename that define to XYUV as well since it doesn't
support per-pixel alpha.

Since you've only implemented this for skl+ you chould mention that
in the commit msg. IVB+ support should be equally trivial to
implement (wink wink).

>  	case DRM_FORMAT_YUYV:
>  		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_YUYV;
>  	case DRM_FORMAT_YVYU:
> @@ -4959,6 +4963,7 @@ static int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
>  	case DRM_FORMAT_UYVY:
>  	case DRM_FORMAT_VYUY:
>  	case DRM_FORMAT_NV12:
> +	case DRM_FORMAT_XYUV:
>  		break;
>  	default:
>  		DRM_DEBUG_KMS("[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
> @@ -13399,6 +13404,7 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
>  	}
>  
>  	switch (format) {
> +

Bogus whitespace.

>  	case DRM_FORMAT_XRGB8888:
>  	case DRM_FORMAT_XBGR8888:
>  	case DRM_FORMAT_ARGB8888:
> @@ -13414,6 +13420,7 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
>  	case DRM_FORMAT_UYVY:
>  	case DRM_FORMAT_VYUY:
>  	case DRM_FORMAT_NV12:
> +	case DRM_FORMAT_XYUV:
>  		if (modifier == I915_FORMAT_MOD_Yf_TILED)
>  			return true;
>  		/* fall through */
> @@ -14540,6 +14547,7 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
>  			goto err;
>  		}
>  		break;
> +	case DRM_FORMAT_XYUV:

That's not the right spot if we want the platform checks to match your
choice of skl+.

>  	case DRM_FORMAT_YUYV:
>  	case DRM_FORMAT_UYVY:
>  	case DRM_FORMAT_YVYU:
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index c286dda625e4..2ac9471974c2 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1420,6 +1420,7 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
>  	case DRM_FORMAT_UYVY:
>  	case DRM_FORMAT_VYUY:
>  	case DRM_FORMAT_NV12:
> +	case DRM_FORMAT_XYUV:
>  		if (modifier == I915_FORMAT_MOD_Yf_TILED)
>  			return true;
>  		/* fall through */
> -- 
> 2.17.0
> 
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-- 
Ville Syrjälä
Intel