Re: [PATCH v9 2/2] drm/i915: Adding YUV444 packed format support for skl+

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

On Tue, Sep 04, 2018 at 02:47:51PM +0200, Maarten Lankhorst wrote:
> Op 30-08-18 om 16:24 schreef Stanislav Lisovskiy:
> > 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
> >
> > v8: Edited commit message to be more clear about skl+, renamed
> >     PLANE_CTL_FORMAT_AYUV to PLANE_CTL_FORMAT_XYUV as this format
> >     doesn't support per-pixel alpha. Fixed minor code issues.
> >
> > v9: Moved DRM format check to proper place in intel_framebuffer_init.
> >
> > Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
> > ---
> >  drivers/gpu/drm/i915/i915_reg.h      |  2 +-
> >  drivers/gpu/drm/i915/intel_display.c | 15 +++++++++++++++
> >  drivers/gpu/drm/i915/intel_sprite.c  |  1 +
> >  3 files changed, 17 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > index 8534f88a60f6..e0c8480aaa02 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -6499,7 +6499,7 @@ enum {
> >  #define   PLANE_CTL_FORMAT_XRGB_2101010		(2 << 24)
> >  #define   PLANE_CTL_FORMAT_XRGB_8888		(4 << 24)
> >  #define   PLANE_CTL_FORMAT_XRGB_16161616F	(6 << 24)
> > -#define   PLANE_CTL_FORMAT_AYUV			(8 << 24)
> > +#define   PLANE_CTL_FORMAT_XYUV			(8 << 24)
> >  #define   PLANE_CTL_FORMAT_INDEXED		(12 << 24)
> >  #define   PLANE_CTL_FORMAT_RGB_565		(14 << 24)
> >  #define   ICL_PLANE_CTL_FORMAT_MASK		(0x1f << 23)
> > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > index 30fdfd1a3037..9323708db71f 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[] = {
> > @@ -101,6 +102,7 @@ static const uint32_t skl_pri_planar_formats[] = {
> >  	DRM_FORMAT_YVYU,
> >  	DRM_FORMAT_UYVY,
> >  	DRM_FORMAT_VYUY,
> > +	DRM_FORMAT_XYUV,
> >  	DRM_FORMAT_NV12,
> >  };
> >  
> > @@ -2672,6 +2674,8 @@ int skl_format_to_fourcc(int format, bool rgb_order, bool alpha)
> >  		return DRM_FORMAT_RGB565;
> >  	case PLANE_CTL_FORMAT_NV12:
> >  		return DRM_FORMAT_NV12;
> > +	case PLANE_CTL_FORMAT_XYUV:
> > +		return DRM_FORMAT_XYUV;
> >  	default:
> >  	case PLANE_CTL_FORMAT_XRGB_8888:
> >  		if (rgb_order) {
> > @@ -3501,6 +3505,8 @@ 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_XYUV;
> >  	case DRM_FORMAT_YUYV:
> >  		return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_YUYV;
> >  	case DRM_FORMAT_YVYU:
> > @@ -4959,6 +4965,7 @@ 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",
> > @@ -13414,6 +13421,7 @@ 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 +14548,13 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
> >  			goto err;
> >  		}
> >  		break;
> > +	case DRM_FORMAT_XYUV:
> > +		if (INTEL_GEN(dev_priv) < 9) {
> > +			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
> > +				      drm_get_format_name(mode_cmd->pixel_format, &format_name));
> > +			goto err;
> > +		}
> > +		break;
> This hunk isn't needed. DRM core rejects any formats not in the format arrays.

There is no formats array for addfb. My patches to elimintate this ugly
code by cross checking with every plane got stuck in limbo.

-- 
Ville Syrjälä
Intel
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