diff options
| author | Benoit Parrot <bparrot@ti.com> | 2021-11-17 15:19:26 +0100 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> | 2021-12-08 10:04:47 +0200 |
| commit | 2e54ff0e5430883f2040450e9297ebad9f56f846 (patch) | |
| tree | d52a4b8164cad5be78cad055cf5109e8cb337408 /drivers/gpu/drm/omapdrm/omap_overlay.h | |
| parent | 6e42201b0ed5d3af66c107144fcd96c17afbc6f1 (diff) | |
drm/omap: dynamically assign hw overlays to planes
(re)assign the hw overlays to planes based on required caps, and to
handle situations where we could not modify an in-use plane.
This means all planes advertise the superset of formats and properties.
Userspace must (as always) use atomic TEST_ONLY step for atomic updates,
as not all planes may be available for use on every frame.
The mapping of hwoverlays to plane is stored in omap_global_state, so
that state updates are atomically committed in the same way that
plane/etc state updates are managed. This is needed because the
omap_plane_state keeps a pointer to the hwoverlay, and we don't want
global state to become out of sync with the plane state if an atomic
update fails, we hit deadlock/ backoff scenario, etc. The use of
global_state_lock keeps multiple parallel updates which both re-assign
hwoverlays properly serialized.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211117141928.771082-8-narmstrong@baylibre.com
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_overlay.h')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_overlay.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_overlay.h b/drivers/gpu/drm/omapdrm/omap_overlay.h index 51d26aebf77d..38ca55e1e2d7 100644 --- a/drivers/gpu/drm/omapdrm/omap_overlay.h +++ b/drivers/gpu/drm/omapdrm/omap_overlay.h @@ -27,4 +27,8 @@ struct omap_hw_overlay { int omap_hwoverlays_init(struct omap_drm_private *priv); void omap_hwoverlays_destroy(struct omap_drm_private *priv); +int omap_overlay_assign(struct drm_atomic_state *s, struct drm_plane *plane, + u32 caps, u32 fourcc, struct omap_hw_overlay **overlay); +void omap_overlay_release(struct drm_atomic_state *s, struct omap_hw_overlay *overlay); +void omap_overlay_update_state(struct omap_drm_private *priv, struct omap_hw_overlay *overlay); #endif /* __OMAPDRM_OVERLAY_H__ */ |