| Message ID | 20180919155700.10342-3-kieran.bingham+renesas@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: Alpha blending issue | expand |
Hi Kieran, Thank you for the patch. On Wednesday, 19 September 2018 18:56:59 EEST Kieran Bingham wrote: > If the alpha property is not added to a plane, a default value will be > used, which can result in a non-visible layer if the alpha is > initialised as 0. > > Provide an alpha blend property on all planes. > > Fixes: 161ad653d6c9 ("drm: rcar-du: Use __drm_atomic_helper_plane_reset > instead of copying the logic") > > Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> > --- > drivers/gpu/drm/rcar-du/rcar_du_plane.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c > b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index 9e07758a755c..72399a19d8a6 > 100644 > --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c > +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c > @@ -783,13 +783,18 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp) > drm_plane_helper_add(&plane->plane, > &rcar_du_plane_helper_funcs); > > + /* > + * The alpha property needs to be initialised on all planes > + * to ensure the correct setting at the output. > + */ > + drm_plane_create_alpha_property(&plane->plane); > + As mentioned in the cover letter, both patches in this series fix the issue at hand. The first patch is more generic as it will fix it for all drivers, while this patch is specific to the R-Car DU driver. It however makes sense to merge it, as it adds alpha support to the primary plane, which can be useful. Once the first patch gets merged, the above comment won't be correct anymore. I wonder whether we shouldn't change the patch description and comment to focus on usage of the alpha property for primary planes, and not on the bug fix. What's your opinion ? > if (type == DRM_PLANE_TYPE_PRIMARY) > continue; > > drm_object_attach_property(&plane->plane.base, > rcdu->props.colorkey, > RCAR_DU_COLORKEY_NONE); > - drm_plane_create_alpha_property(&plane->plane); > drm_plane_create_zpos_property(&plane->plane, 1, 1, 7); > }
Hi Kieran, On Thursday, 20 September 2018 14:22:38 EET Laurent Pinchart wrote: > On Wednesday, 19 September 2018 18:56:59 EEST Kieran Bingham wrote: > > If the alpha property is not added to a plane, a default value will be > > used, which can result in a non-visible layer if the alpha is > > initialised as 0. > > > > Provide an alpha blend property on all planes. > > > > Fixes: 161ad653d6c9 ("drm: rcar-du: Use __drm_atomic_helper_plane_reset > > instead of copying the logic") > > > > Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> > > --- > > > > drivers/gpu/drm/rcar-du/rcar_du_plane.c | 7 ++++++- > > 1 file changed, 6 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c > > b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index 9e07758a755c..72399a19d8a6 > > 100644 > > --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c > > +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c > > @@ -783,13 +783,18 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp) > > > > drm_plane_helper_add(&plane->plane, > > > > &rcar_du_plane_helper_funcs); > > > > + /* > > + * The alpha property needs to be initialised on all planes > > + * to ensure the correct setting at the output. > > + */ > > + drm_plane_create_alpha_property(&plane->plane); > > + > > As mentioned in the cover letter, both patches in this series fix the issue > at hand. The first patch is more generic as it will fix it for all drivers, > while this patch is specific to the R-Car DU driver. It however makes sense > to merge it, as it adds alpha support to the primary plane, which can be > useful. > > Once the first patch gets merged, the above comment won't be correct > anymore. I wonder whether we shouldn't change the patch description and > comment to focus on usage of the alpha property for primary planes, and not > on the bug fix. What's your opinion ? I've removed the comment and changed the commit message to drm: rcar-du: Enable alpha property on primary planes The hardware supports alpha on all planes, and using it on the primary plane can be useful. Don't restrict the alpha property to overlay planes. With this, Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> and applied to my tree. > > if (type == DRM_PLANE_TYPE_PRIMARY) > > continue; > > > > drm_object_attach_property(&plane->plane.base, > > rcdu->props.colorkey, > > RCAR_DU_COLORKEY_NONE); > > > > - drm_plane_create_alpha_property(&plane->plane); > > drm_plane_create_zpos_property(&plane->plane, 1, 1, 7); > > }
Hi Laurent, On 21/11/2018 18:29, Laurent Pinchart wrote: > Hi Kieran, > > On Thursday, 20 September 2018 14:22:38 EET Laurent Pinchart wrote: >> On Wednesday, 19 September 2018 18:56:59 EEST Kieran Bingham wrote: >>> If the alpha property is not added to a plane, a default value will be >>> used, which can result in a non-visible layer if the alpha is >>> initialised as 0. >>> >>> Provide an alpha blend property on all planes. >>> >>> Fixes: 161ad653d6c9 ("drm: rcar-du: Use __drm_atomic_helper_plane_reset >>> instead of copying the logic") >>> >>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> >>> --- >>> >>> drivers/gpu/drm/rcar-du/rcar_du_plane.c | 7 ++++++- >>> 1 file changed, 6 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c >>> b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index 9e07758a755c..72399a19d8a6 >>> 100644 >>> --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c >>> +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c >>> @@ -783,13 +783,18 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp) >>> >>> drm_plane_helper_add(&plane->plane, >>> >>> &rcar_du_plane_helper_funcs); >>> >>> + /* >>> + * The alpha property needs to be initialised on all planes >>> + * to ensure the correct setting at the output. >>> + */ >>> + drm_plane_create_alpha_property(&plane->plane); >>> + >> >> As mentioned in the cover letter, both patches in this series fix the issue >> at hand. The first patch is more generic as it will fix it for all drivers, >> while this patch is specific to the R-Car DU driver. It however makes sense >> to merge it, as it adds alpha support to the primary plane, which can be >> useful. >> >> Once the first patch gets merged, the above comment won't be correct >> anymore. I wonder whether we shouldn't change the patch description and >> comment to focus on usage of the alpha property for primary planes, and not >> on the bug fix. What's your opinion ? Aha - sorry this slipped my queue. > I've removed the comment and changed the commit message to > > drm: rcar-du: Enable alpha property on primary planes > > The hardware supports alpha on all planes, and using it on the primary > plane can be useful. Don't restrict the alpha property to overlay > planes. > > With this, > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Perfect, - That reads fine. Thank you. > > and applied to my tree. > >>> if (type == DRM_PLANE_TYPE_PRIMARY) >>> continue; >>> >>> drm_object_attach_property(&plane->plane.base, >>> rcdu->props.colorkey, >>> RCAR_DU_COLORKEY_NONE); >>> >>> - drm_plane_create_alpha_property(&plane->plane); >>> drm_plane_create_zpos_property(&plane->plane, 1, 1, 7); >>> } >
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index 9e07758a755c..72399a19d8a6 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c @@ -783,13 +783,18 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp) drm_plane_helper_add(&plane->plane, &rcar_du_plane_helper_funcs); + /* + * The alpha property needs to be initialised on all planes + * to ensure the correct setting at the output. + */ + drm_plane_create_alpha_property(&plane->plane); + if (type == DRM_PLANE_TYPE_PRIMARY) continue; drm_object_attach_property(&plane->plane.base, rcdu->props.colorkey, RCAR_DU_COLORKEY_NONE); - drm_plane_create_alpha_property(&plane->plane); drm_plane_create_zpos_property(&plane->plane, 1, 1, 7); }
If the alpha property is not added to a plane, a default value will be used, which can result in a non-visible layer if the alpha is initialised as 0. Provide an alpha blend property on all planes. Fixes: 161ad653d6c9 ("drm: rcar-du: Use __drm_atomic_helper_plane_reset instead of copying the logic") Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> --- drivers/gpu/drm/rcar-du/rcar_du_plane.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)