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drm/atomic-helper: Add format-conversion state to shadow-plane state

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Store an instance of struct drm_format_conv_state in the shadow-plane
state struct drm_shadow_plane_state. Many drivers with shadow planes
use DRM's format helpers to copy or convert the framebuffer data to
backing storage in the scanout buffer. The shadow plane provides the
necessary state and manages the conversion's intermediate buffer memory.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Tested-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231009141018.11291-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2023-10-09 16:06:31 +02:00
parent 38b2d9d385
commit 903674588a
2 changed files with 19 additions and 0 deletions
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9
drivers/gpu/drm/drm_gem_atomic_helper.c
View File

@ -218,7 +218,14 @@ void
__drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane,
struct drm_shadow_plane_state *new_shadow_plane_state)
{
struct drm_plane_state *plane_state = plane->state;
struct drm_shadow_plane_state *shadow_plane_state =
to_drm_shadow_plane_state(plane_state);
__drm_atomic_helper_plane_duplicate_state(plane, &new_shadow_plane_state->base);
drm_format_conv_state_copy(&shadow_plane_state->fmtcnv_state,
&new_shadow_plane_state->fmtcnv_state);
}
EXPORT_SYMBOL(__drm_gem_duplicate_shadow_plane_state);
@ -266,6 +273,7 @@ EXPORT_SYMBOL(drm_gem_duplicate_shadow_plane_state);
*/
void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state)
{
drm_format_conv_state_release(&shadow_plane_state->fmtcnv_state);
__drm_atomic_helper_plane_destroy_state(&shadow_plane_state->base);
}
EXPORT_SYMBOL(__drm_gem_destroy_shadow_plane_state);
@ -302,6 +310,7 @@ void __drm_gem_reset_shadow_plane(struct drm_plane *plane,
struct drm_shadow_plane_state *shadow_plane_state)
{
__drm_atomic_helper_plane_reset(plane, &shadow_plane_state->base);
drm_format_conv_state_init(&shadow_plane_state->fmtcnv_state);
}
EXPORT_SYMBOL(__drm_gem_reset_shadow_plane);

10
include/drm/drm_gem_atomic_helper.h
View File

@ -5,6 +5,7 @@
#include <linux/iosys-map.h>
#include <drm/drm_format_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_plane.h>
@ -49,6 +50,15 @@ struct drm_shadow_plane_state {
/** @base: plane state */
struct drm_plane_state base;
/**
* @fmtcnv_state: Format-conversion state
*
* Per-plane state for format conversion.
* Flags for copying shadow buffers into backend storage. Also holds
* temporary storage for format conversion.
*/
struct drm_format_conv_state fmtcnv_state;
/* Transitional state - do not export or duplicate */
/**