2e54ff0e54
(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
35 lines
986 B
C
35 lines
986 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Author: Benoit Parrot <bparrot@ti.com>
|
|
*/
|
|
|
|
#ifndef __OMAPDRM_OVERLAY_H__
|
|
#define __OMAPDRM_OVERLAY_H__
|
|
|
|
#include <linux/types.h>
|
|
|
|
enum drm_plane_type;
|
|
|
|
struct drm_device;
|
|
struct drm_mode_object;
|
|
struct drm_plane;
|
|
|
|
/* Used to associate a HW overlay/plane to a plane */
|
|
struct omap_hw_overlay {
|
|
unsigned int idx;
|
|
|
|
const char *name;
|
|
enum omap_plane_id id;
|
|
|
|
enum omap_overlay_caps caps;
|
|
};
|
|
|
|
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__ */
|