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

[Lisovskiy, Stanislav]

On Thu, 2018-08-30 at 11:15 -0700, Dhinakaran Pandiyan wrote:
> On Thu, 2018-08-30 at 13:57 +0100, Lisovskiy, Stanislav wrote:
> > On Wed, 2018-08-29 at 12:16 -0700, Dhinakaran Pandiyan wrote:
> > > 
> > > On Wed, 2018-08-29 at 21:10 +0300, Ville Syrjälä wrote:
> > > > 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.
> 
> Curious what the reason is. Is it because the hardware does not
> support
> alpha with this format?

As I understood yes, this is a hardware limitation.

> 
> > > > > 
> > > > > v6: Removed unneeded initializer for new XYUV format.
> > > > > 
> > > > > v7: Added scaling support for DRM_FORMAT_XYUV
> > > 
> > > I don't see yuv formats in skl_format_to_fourcc(), any idea why?
> > 
> > Good point. I guess would be nice idea to add at least XYUV there
> > now.
> > I can add rest of the formats with a separate patch afterwards.
> 
> Wonder if the expectation is BIOS not use yuv formats. Ville?

I talked to Ville yesterday, I think that was basically what he said.

> 
> > 
> > > 
> > > Also, shouldn't plane_color_ctl_alpha() be updated?
> > 
> > I guess not, as we don't support alpha in that case.
> 
> Right, the default case should take care of setting
> PLANE_CTL_ALPHA_DISABLE. I misread it.
> 
> > 
> > > 
> > > > > 
> > > > > Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel
> > > > > .c
> > > > > om
> > > > > > 
> > > > > 
> > > > > ---
> > > > >  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
> > > > > 
> > > > > _______________________________________________
> > > > > Intel-gfx mailing list
> > > > > Intel-gfx at lists.freedesktop.org
> > > > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> > > > 
> > > > 
> > 
> > -- 
> > Best Regards,
> > 
> > Lisovskiy Stanislav
-- 
Best Regards,

Lisovskiy Stanislav