Re: [Intel-gfx] [PATCH 7/8] drm: Check that the plane supports the request format+modifier combo

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On Wed, Jan 10, 2018 at 02:04:57PM +0100, Daniel Vetter wrote:
> On Fri, Dec 22, 2017 at 09:22:30PM +0200, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > 
> > Currently we only check that the plane supports the pixel format of the
> > fb we're about to feed to it. Extend it to check also the modifier, and
> > more specifically that the combination of the format and modifier is
> > supported.
> > 
> > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > Cc: Ben Widawsky <ben@xxxxxxxxxxxx>
> > Cc: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
> > Cc: Daniel Stone <daniels@xxxxxxxxxxxxx>
> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> 
> Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>

Finally pushed this (and the followup i915 patch) to drm-misc-next.
Thanks for the reviews.

> 
> > ---
> >  drivers/gpu/drm/drm_atomic.c        | 10 ++++++----
> >  drivers/gpu/drm/drm_crtc.c          | 10 ++++++----
> >  drivers/gpu/drm/drm_crtc_internal.h |  4 ++--
> >  drivers/gpu/drm/drm_plane.c         | 33 ++++++++++++++++++++++++++-------
> >  4 files changed, 40 insertions(+), 17 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> > index b76d49218cf1..6e5c3ea1e43b 100644
> > --- a/drivers/gpu/drm/drm_atomic.c
> > +++ b/drivers/gpu/drm/drm_atomic.c
> > @@ -882,12 +882,14 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
> >  	}
> >  
> >  	/* Check whether this plane supports the fb pixel format. */
> > -	ret = drm_plane_check_pixel_format(plane, state->fb->format->format);
> > +	ret = drm_plane_check_pixel_format(plane, state->fb->format->format,
> > +					   state->fb->modifier);
> >  	if (ret) {
> >  		struct drm_format_name_buf format_name;
> > -		DRM_DEBUG_ATOMIC("Invalid pixel format %s\n",
> > -		                 drm_get_format_name(state->fb->format->format,
> > -		                                     &format_name));
> > +		DRM_DEBUG_ATOMIC("Invalid pixel format %s, modifier 0x%llx\n",
> > +				 drm_get_format_name(state->fb->format->format,
> > +						     &format_name),
> > +				 state->fb->modifier);
> >  		return ret;
> >  	}
> >  
> > diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> > index f0556e654116..816c30a0f030 100644
> > --- a/drivers/gpu/drm/drm_crtc.c
> > +++ b/drivers/gpu/drm/drm_crtc.c
> > @@ -625,12 +625,14 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
> >  		 */
> >  		if (!crtc->primary->format_default) {
> >  			ret = drm_plane_check_pixel_format(crtc->primary,
> > -							   fb->format->format);
> > +							   fb->format->format,
> > +							   fb->modifier);
> >  			if (ret) {
> >  				struct drm_format_name_buf format_name;
> > -				DRM_DEBUG_KMS("Invalid pixel format %s\n",
> > -				              drm_get_format_name(fb->format->format,
> > -				                                  &format_name));
> > +				DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
> > +					      drm_get_format_name(fb->format->format,
> > +								  &format_name),
> > +					      fb->modifier);
> >  				goto out;
> >  			}
> >  		}
> > diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
> > index af00f42ba269..860968a64ae7 100644
> > --- a/drivers/gpu/drm/drm_crtc_internal.h
> > +++ b/drivers/gpu/drm/drm_crtc_internal.h
> > @@ -196,8 +196,8 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
> >  /* drm_plane.c */
> >  int drm_plane_register_all(struct drm_device *dev);
> >  void drm_plane_unregister_all(struct drm_device *dev);
> > -int drm_plane_check_pixel_format(const struct drm_plane *plane,
> > -				 u32 format);
> > +int drm_plane_check_pixel_format(struct drm_plane *plane,
> > +				 u32 format, u64 modifier);
> >  
> >  /* drm_bridge.c */
> >  void drm_bridge_detach(struct drm_bridge *bridge);
> > diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> > index 2c90519576a3..8ac19379fe99 100644
> > --- a/drivers/gpu/drm/drm_plane.c
> > +++ b/drivers/gpu/drm/drm_plane.c
> > @@ -545,16 +545,33 @@ int drm_mode_getplane(struct drm_device *dev, void *data,
> >  	return 0;
> >  }
> >  
> > -int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
> > +int drm_plane_check_pixel_format(struct drm_plane *plane,
> > +				 u32 format, u64 modifier)
> >  {
> >  	unsigned int i;
> >  
> >  	for (i = 0; i < plane->format_count; i++) {
> >  		if (format == plane->format_types[i])
> > -			return 0;
> > +			break;
> > +	}
> > +	if (i == plane->format_count)
> > +		return -EINVAL;
> > +
> > +	if (!plane->modifier_count)
> > +		return 0;
> > +
> > +	for (i = 0; i < plane->modifier_count; i++) {
> > +		if (modifier == plane->modifiers[i])
> > +			break;
> >  	}
> > +	if (i == plane->modifier_count)
> > +		return -EINVAL;
> >  
> > -	return -EINVAL;
> > +	if (plane->funcs->format_mod_supported &&
> > +	    !plane->funcs->format_mod_supported(plane, format, modifier))
> > +		return -EINVAL;
> > +
> > +	return 0;
> >  }
> >  
> >  /*
> > @@ -598,12 +615,14 @@ static int __setplane_internal(struct drm_plane *plane,
> >  	}
> >  
> >  	/* Check whether this plane supports the fb pixel format. */
> > -	ret = drm_plane_check_pixel_format(plane, fb->format->format);
> > +	ret = drm_plane_check_pixel_format(plane, fb->format->format,
> > +					   fb->modifier);
> >  	if (ret) {
> >  		struct drm_format_name_buf format_name;
> > -		DRM_DEBUG_KMS("Invalid pixel format %s\n",
> > -		              drm_get_format_name(fb->format->format,
> > -		                                  &format_name));
> > +		DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
> > +			      drm_get_format_name(fb->format->format,
> > +						  &format_name),
> > +			      fb->modifier);
> >  		goto out;
> >  	}
> >  
> > -- 
> > 2.13.6
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Ville Syrjälä
Intel OTC
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