| Message ID | 20200402104035.13497-1-laurent.pinchart+renesas@ideasonboard.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: rcar-du: Create immutable zpos property for primary planes | expand |
On Thu, 2 Apr 2020 at 11:40, Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> wrote: > The R-Car DU driver creates a zpos property, ranging from 1 to 7, for > all the overlay planes, but leaves the primary plane without a zpos > property. The DRM/KMS API doesn't clearly specify if this is acceptable, > of it the property is mandatory for all planes when exposed for some of > the planes. Nonetheless, weston v8.0 has been reported to have trouble > handling this situation. Yeah. It didn't even occur to me/us that someone would do that, to be honest. We need to have zpos information for all planes that we're using in order for zpos to be at all meaningful, and we can't exactly avoid using the primary plane. Without knowing the primary plane's zpos, we can't know if the overlays are actually overlays or in fact underlays. > The DRM core offers support for immutable zpos properties. Creating an > immutable zpos property set to 0 for the primary planes seems to be a > good way forward, as it shouldn't introduce any regression, and can fix > the issue. Do so. Perfect. We support immutable properties entirely well, we just need to know about them. > Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Cheers, Daniel
Hi Laurent, On Thu, Apr 2, 2020 at 12:42 PM Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> wrote: > The R-Car DU driver creates a zpos property, ranging from 1 to 7, for > all the overlay planes, but leaves the primary plane without a zpos > property. The DRM/KMS API doesn't clearly specify if this is acceptable, > of it the property is mandatory for all planes when exposed for some of > the planes. Nonetheless, weston v8.0 has been reported to have trouble > handling this situation. > > The DRM core offers support for immutable zpos properties. Creating an > immutable zpos property set to 0 for the primary planes seems to be a > good way forward, as it shouldn't introduce any regression, and can fix > the issue. Do so. > > Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Thanks for your patch! > --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c > +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c > @@ -785,13 +785,15 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp) > > 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_zpos_property(&plane->plane, 1, 1, 7); > + if (type == DRM_PLANE_TYPE_PRIMARY) { > + drm_plane_create_zpos_immutable_property(&plane->plane, > + 0); > + } else { > + drm_object_attach_property(&plane->plane.base, > + rcdu->props.colorkey, > + RCAR_DU_COLORKEY_NONE); > + drm_plane_create_zpos_property(&plane->plane, 1, 1, 7); > + } > } > > return 0; This is very similar to Esaki-san's patch[*] posted yesterday. However, there's one big difference: your patch doesn't update rcar_du_vsp_init(). Isn't that needed? [*] "[PATCH] drm: rcar-du: Set primary plane zpos immutably at initializing" https://lore.kernel.org/linux-renesas-soc/20200401061100.7379-1-etom@igel.co.jp/ Gr{oetje,eeting}s, Geert
On Thu, Apr 2, 2020 at 12:57 PM Daniel Stone <daniel@fooishbar.org> wrote: > > On Thu, 2 Apr 2020 at 11:40, Laurent Pinchart > <laurent.pinchart+renesas@ideasonboard.com> wrote: > > The R-Car DU driver creates a zpos property, ranging from 1 to 7, for > > all the overlay planes, but leaves the primary plane without a zpos > > property. The DRM/KMS API doesn't clearly specify if this is acceptable, > > of it the property is mandatory for all planes when exposed for some of > > the planes. Nonetheless, weston v8.0 has been reported to have trouble > > handling this situation. > > Yeah. It didn't even occur to me/us that someone would do that, to be > honest. We need to have zpos information for all planes that we're > using in order for zpos to be at all meaningful, and we can't exactly > avoid using the primary plane. Without knowing the primary plane's > zpos, we can't know if the overlays are actually overlays or in fact > underlays. Maybe we need to clarify docs that if you expose zpos, then you should expose it on all planes (opting for immutable zpos where it can't be adjusted)? Care to type up that quick doc patch please? -Daniel > > > The DRM core offers support for immutable zpos properties. Creating an > > immutable zpos property set to 0 for the primary planes seems to be a > > good way forward, as it shouldn't introduce any regression, and can fix > > the issue. Do so. > > Perfect. We support immutable properties entirely well, we just need > to know about them. > > > Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > > Reviewed-by: Daniel Stone <daniels@collabora.com> > > Cheers, > Daniel > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
Hi Geert, On Thu, Apr 02, 2020 at 01:12:51PM +0200, Geert Uytterhoeven wrote: > On Thu, Apr 2, 2020 at 12:42 PM Laurent Pinchart wrote: > > The R-Car DU driver creates a zpos property, ranging from 1 to 7, for > > all the overlay planes, but leaves the primary plane without a zpos > > property. The DRM/KMS API doesn't clearly specify if this is acceptable, > > of it the property is mandatory for all planes when exposed for some of > > the planes. Nonetheless, weston v8.0 has been reported to have trouble > > handling this situation. > > > > The DRM core offers support for immutable zpos properties. Creating an > > immutable zpos property set to 0 for the primary planes seems to be a > > good way forward, as it shouldn't introduce any regression, and can fix > > the issue. Do so. > > > > Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > > Thanks for your patch! > > > --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c > > +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c > > @@ -785,13 +785,15 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp) > > > > 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_zpos_property(&plane->plane, 1, 1, 7); > > + if (type == DRM_PLANE_TYPE_PRIMARY) { > > + drm_plane_create_zpos_immutable_property(&plane->plane, > > + 0); > > + } else { > > + drm_object_attach_property(&plane->plane.base, > > + rcdu->props.colorkey, > > + RCAR_DU_COLORKEY_NONE); > > + drm_plane_create_zpos_property(&plane->plane, 1, 1, 7); > > + } > > } > > > > return 0; > > This is very similar to Esaki-san's patch[*] posted yesterday. Thank you for pointing me to it, I had missed that patch. > However, there's one big difference: your patch doesn't update > rcar_du_vsp_init(). Isn't that needed? > > [*] "[PATCH] drm: rcar-du: Set primary plane zpos immutably at initializing" > https://lore.kernel.org/linux-renesas-soc/20200401061100.7379-1-etom@igel.co.jp/ My bad. I've sent a v2 of Esaki-san's patch to CC the dri-devel mailing list, and have applied it to my tree.
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c index c6430027169f..a0021fc25b27 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c @@ -785,13 +785,15 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp) 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_zpos_property(&plane->plane, 1, 1, 7); + if (type == DRM_PLANE_TYPE_PRIMARY) { + drm_plane_create_zpos_immutable_property(&plane->plane, + 0); + } else { + drm_object_attach_property(&plane->plane.base, + rcdu->props.colorkey, + RCAR_DU_COLORKEY_NONE); + drm_plane_create_zpos_property(&plane->plane, 1, 1, 7); + } } return 0;
The R-Car DU driver creates a zpos property, ranging from 1 to 7, for all the overlay planes, but leaves the primary plane without a zpos property. The DRM/KMS API doesn't clearly specify if this is acceptable, of it the property is mandatory for all planes when exposed for some of the planes. Nonetheless, weston v8.0 has been reported to have trouble handling this situation. The DRM core offers support for immutable zpos properties. Creating an immutable zpos property set to 0 for the primary planes seems to be a good way forward, as it shouldn't introduce any regression, and can fix the issue. Do so. Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> --- drivers/gpu/drm/rcar-du/rcar_du_plane.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)