| Message ID | 20180919155700.10342-2-kieran.bingham+renesas@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: Alpha blending issue | expand |
On Wed, Sep 19, 2018 at 04:56:58PM +0100, Kieran Bingham wrote: > Planes without an alpha property, using __drm_atomic_helper_plane_reset > will have their plane state alpha initialised as zero, which represents > a transparent alpha. > > If this value is then used for the plane, it may not be visible by > default, and thus doesn't represent a good initialisation state. > > Update the default state->alpha value to DRM_BLEND_ALPHA_OPAQUE > unconditionally when the plane is reset. > > Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> > --- > drivers/gpu/drm/drm_atomic_helper.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > index 3cf1aa132778..e49b22381048 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -3569,9 +3569,7 @@ void __drm_atomic_helper_plane_reset(struct drm_plane *plane, > state->plane = plane; > state->rotation = DRM_MODE_ROTATE_0; > > - /* Reset the alpha value to fully opaque if it matters */ > - if (plane->alpha_property) > - state->alpha = plane->alpha_property->values[1]; > + state->alpha = DRM_BLEND_ALPHA_OPAQUE; I can't come up with a solid excuse for not initializing it always. Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> > state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; > > plane->state = state; > -- > 2.17.1 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
Hi Kieran, On Wed, Sep 19, 2018 at 07:15:45PM +0300, Ville Syrjälä wrote: > On Wed, Sep 19, 2018 at 04:56:58PM +0100, Kieran Bingham wrote: > > Planes without an alpha property, using __drm_atomic_helper_plane_reset > > will have their plane state alpha initialised as zero, which represents > > a transparent alpha. > > > > If this value is then used for the plane, it may not be visible by > > default, and thus doesn't represent a good initialisation state. > > > > Update the default state->alpha value to DRM_BLEND_ALPHA_OPAQUE > > unconditionally when the plane is reset. > > > > Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> > > --- > > drivers/gpu/drm/drm_atomic_helper.c | 4 +--- > > 1 file changed, 1 insertion(+), 3 deletions(-) > > > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > > index 3cf1aa132778..e49b22381048 100644 > > --- a/drivers/gpu/drm/drm_atomic_helper.c > > +++ b/drivers/gpu/drm/drm_atomic_helper.c > > @@ -3569,9 +3569,7 @@ void __drm_atomic_helper_plane_reset(struct drm_plane *plane, > > state->plane = plane; > > state->rotation = DRM_MODE_ROTATE_0; > > > > - /* Reset the alpha value to fully opaque if it matters */ > > - if (plane->alpha_property) > > - state->alpha = plane->alpha_property->values[1]; > > + state->alpha = DRM_BLEND_ALPHA_OPAQUE; > > I can't come up with a solid excuse for not initializing it always. > > Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Neither do I, so: Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com> And thanks again. I plan to push it tomorrow to drm-misc-next. Now, I've seen the plane_reset patches in the pull request for drm-next 4.20, I wonder if someone could tell me what should I do to get this patch on that train. > > > state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; > > > > plane->state = state; > > -- > > 2.17.1 > > > > _______________________________________________ > > dri-devel mailing list > > dri-devel@lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/dri-devel > > -- > Ville Syrjälä > Intel
Hi Alexandru, On 19/09/18 17:43, Alexandru-Cosmin Gheorghe wrote: > Hi Kieran, > > > On Wed, Sep 19, 2018 at 07:15:45PM +0300, Ville Syrjälä wrote: >> On Wed, Sep 19, 2018 at 04:56:58PM +0100, Kieran Bingham wrote: >>> Planes without an alpha property, using __drm_atomic_helper_plane_reset >>> will have their plane state alpha initialised as zero, which represents >>> a transparent alpha. >>> >>> If this value is then used for the plane, it may not be visible by >>> default, and thus doesn't represent a good initialisation state. >>> >>> Update the default state->alpha value to DRM_BLEND_ALPHA_OPAQUE >>> unconditionally when the plane is reset. >>> >>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> >>> --- >>> drivers/gpu/drm/drm_atomic_helper.c | 4 +--- >>> 1 file changed, 1 insertion(+), 3 deletions(-) >>> >>> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c >>> index 3cf1aa132778..e49b22381048 100644 >>> --- a/drivers/gpu/drm/drm_atomic_helper.c >>> +++ b/drivers/gpu/drm/drm_atomic_helper.c >>> @@ -3569,9 +3569,7 @@ void __drm_atomic_helper_plane_reset(struct drm_plane *plane, >>> state->plane = plane; >>> state->rotation = DRM_MODE_ROTATE_0; >>> >>> - /* Reset the alpha value to fully opaque if it matters */ >>> - if (plane->alpha_property) >>> - state->alpha = plane->alpha_property->values[1]; >>> + state->alpha = DRM_BLEND_ALPHA_OPAQUE; >> >> I can't come up with a solid excuse for not initializing it always. >> >> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> > > Neither do I, so: > Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com> > > And thanks again. > > I plan to push it tomorrow to drm-misc-next. > > Now, I've seen the plane_reset patches in the pull request for drm-next > 4.20, I wonder if someone could tell me what should I do to get this > patch on that train. I've submitted a separate patch for the rcar-du which enables the alpha property for the primary plane - and it incorporates a "Fixes: 161ad653d6c9 ("drm: rcar-du: Use __drm_atomic_helper_plane_reset instead of copying the logic")" tag. Technically that should be sufficient to get that fix into v4.19 I believe ... But if you feel that this patch should also be included - we could add the same tag to this patch, and get it queued up for v4.19 fixes? -- Regards Kieran > >> >>> state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; >>> >>> plane->state = state; >>> -- >>> 2.17.1 >>> >>> _______________________________________________ >>> dri-devel mailing list >>> dri-devel@lists.freedesktop.org >>> https://lists.freedesktop.org/mailman/listinfo/dri-devel >> >> -- >> Ville Syrjälä >> Intel >
On Thu, Sep 20, 2018 at 11:03:12AM +0100, Kieran Bingham wrote: > Hi Alexandru, > > On 19/09/18 17:43, Alexandru-Cosmin Gheorghe wrote: > > Hi Kieran, > > > > > > On Wed, Sep 19, 2018 at 07:15:45PM +0300, Ville Syrjälä wrote: > >> On Wed, Sep 19, 2018 at 04:56:58PM +0100, Kieran Bingham wrote: > >>> Planes without an alpha property, using __drm_atomic_helper_plane_reset > >>> will have their plane state alpha initialised as zero, which represents > >>> a transparent alpha. > >>> > >>> If this value is then used for the plane, it may not be visible by > >>> default, and thus doesn't represent a good initialisation state. > >>> > >>> Update the default state->alpha value to DRM_BLEND_ALPHA_OPAQUE > >>> unconditionally when the plane is reset. > >>> > >>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> > >>> --- > >>> drivers/gpu/drm/drm_atomic_helper.c | 4 +--- > >>> 1 file changed, 1 insertion(+), 3 deletions(-) > >>> > >>> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c > >>> index 3cf1aa132778..e49b22381048 100644 > >>> --- a/drivers/gpu/drm/drm_atomic_helper.c > >>> +++ b/drivers/gpu/drm/drm_atomic_helper.c > >>> @@ -3569,9 +3569,7 @@ void __drm_atomic_helper_plane_reset(struct drm_plane *plane, > >>> state->plane = plane; > >>> state->rotation = DRM_MODE_ROTATE_0; > >>> > >>> - /* Reset the alpha value to fully opaque if it matters */ > >>> - if (plane->alpha_property) > >>> - state->alpha = plane->alpha_property->values[1]; > >>> + state->alpha = DRM_BLEND_ALPHA_OPAQUE; > >> > >> I can't come up with a solid excuse for not initializing it always. > >> > >> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> > > > > Neither do I, so: > > Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com> > > > > And thanks again. > > > > I plan to push it tomorrow to drm-misc-next. > > > > Now, I've seen the plane_reset patches in the pull request for drm-next > > 4.20, I wonder if someone could tell me what should I do to get this > > patch on that train. > > I've submitted a separate patch for the rcar-du which enables the alpha > property for the primary plane - and it incorporates a "Fixes: > 161ad653d6c9 ("drm: rcar-du: Use __drm_atomic_helper_plane_reset > instead of copying the logic")" tag. > > Technically that should be sufficient to get that fix into v4.19 I > believe ... plane_reset patches are not in v4.19, but in drm-next which as far as I know will be sent for v4.20 > > But if you feel that this patch should also be included - we could add > the same tag to this patch, and get it queued up for v4.19 fixes? Looking here https://01.org/linuxgraphics/gfx-docs/maintainer-tools/repositories.html#drm-misc-next It seems that the last pull request for v4.20 of drm-misc-next will be sent around rc6, so I think putting it in drm-misc-next will be enough to get this with the rest of the plane_reset patch in v4.20, but just to make sure I will double check with Sean on IRC. > > -- > Regards > > Kieran > > > > > >> > >>> state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; > >>> > >>> plane->state = state; > >>> -- > >>> 2.17.1 > >>> > >>> _______________________________________________ > >>> dri-devel mailing list > >>> dri-devel@lists.freedesktop.org > >>> https://lists.freedesktop.org/mailman/listinfo/dri-devel > >> > >> -- > >> Ville Syrjälä > >> Intel > >
Hi Kieran, Thank you for the patch. On Wednesday, 19 September 2018 18:56:58 EEST Kieran Bingham wrote: > Planes without an alpha property, using __drm_atomic_helper_plane_reset > will have their plane state alpha initialised as zero, which represents > a transparent alpha. > > If this value is then used for the plane, it may not be visible by > default, and thus doesn't represent a good initialisation state. > > Update the default state->alpha value to DRM_BLEND_ALPHA_OPAQUE > unconditionally when the plane is reset. > > Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> I believe the decision to use plane->alpha_property->values[1] instead of hardcoding DRM_BLEND_ALPHA_OPAQUE comes from earlier versions of the alpha patch series that supported driver-specific ranges for the alpha value. The current implementation uses DRM_BLEND_ALPHA_OPAQUE unconditionally, and no driver modifies the maximum value behind the scene, so Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > --- > drivers/gpu/drm/drm_atomic_helper.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/drm_atomic_helper.c > b/drivers/gpu/drm/drm_atomic_helper.c index 3cf1aa132778..e49b22381048 > 100644 > --- a/drivers/gpu/drm/drm_atomic_helper.c > +++ b/drivers/gpu/drm/drm_atomic_helper.c > @@ -3569,9 +3569,7 @@ void __drm_atomic_helper_plane_reset(struct drm_plane > *plane, state->plane = plane; > state->rotation = DRM_MODE_ROTATE_0; > > - /* Reset the alpha value to fully opaque if it matters */ > - if (plane->alpha_property) > - state->alpha = plane->alpha_property->values[1]; > + state->alpha = DRM_BLEND_ALPHA_OPAQUE; > state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; > > plane->state = state;
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 3cf1aa132778..e49b22381048 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -3569,9 +3569,7 @@ void __drm_atomic_helper_plane_reset(struct drm_plane *plane, state->plane = plane; state->rotation = DRM_MODE_ROTATE_0; - /* Reset the alpha value to fully opaque if it matters */ - if (plane->alpha_property) - state->alpha = plane->alpha_property->values[1]; + state->alpha = DRM_BLEND_ALPHA_OPAQUE; state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; plane->state = state;
Planes without an alpha property, using __drm_atomic_helper_plane_reset will have their plane state alpha initialised as zero, which represents a transparent alpha. If this value is then used for the plane, it may not be visible by default, and thus doesn't represent a good initialisation state. Update the default state->alpha value to DRM_BLEND_ALPHA_OPAQUE unconditionally when the plane is reset. Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> --- drivers/gpu/drm/drm_atomic_helper.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)