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drm/gem: Export implementation of shadow-plane helpers 

Export the implementation of duplicate, destroy and reset helpers for
shadow-buffered plane state. Useful for drivers that subclass struct
drm_shadow_plane_state.

The exported functions are wrappers around plane-state implementation,
but using them is the correct thing to do for drivers.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Melissa Wen <melissa.srw@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210705074633.9425-2-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2021-07-05 09:46:30 +02:00
parent 6293eb2891
commit b715650220
2 changed files with 58 additions and 3 deletions
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55
drivers/gpu/drm/drm_gem_atomic_helper.c
View File

@ -182,6 +182,27 @@ EXPORT_SYMBOL(drm_gem_simple_display_pipe_prepare_fb);
* Shadow-buffered Planes
*/
/**
* __drm_gem_duplicate_shadow_plane_state - duplicates shadow-buffered plane state
* @plane: the plane
* @new_shadow_plane_state: the new shadow-buffered plane state
*
* This function duplicates shadow-buffered plane state. This is helpful for drivers
* that subclass struct drm_shadow_plane_state.
*
* The function does not duplicate existing mappings of the shadow buffers.
* Mappings are maintained during the atomic commit by the plane's prepare_fb
* and cleanup_fb helpers. See drm_gem_prepare_shadow_fb() and drm_gem_cleanup_shadow_fb()
* for corresponding helpers.
*/
void
__drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane,
struct drm_shadow_plane_state *new_shadow_plane_state)
{
__drm_atomic_helper_plane_duplicate_state(plane, &new_shadow_plane_state->base);
}
EXPORT_SYMBOL(__drm_gem_duplicate_shadow_plane_state);
/**
* drm_gem_duplicate_shadow_plane_state - duplicates shadow-buffered plane state
* @plane: the plane
@ -211,12 +232,25 @@ drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane)
new_shadow_plane_state = kzalloc(sizeof(*new_shadow_plane_state), GFP_KERNEL);
if (!new_shadow_plane_state)
return NULL;
__drm_atomic_helper_plane_duplicate_state(plane, &new_shadow_plane_state->base);
__drm_gem_duplicate_shadow_plane_state(plane, new_shadow_plane_state);
return &new_shadow_plane_state->base;
}
EXPORT_SYMBOL(drm_gem_duplicate_shadow_plane_state);
/**
* __drm_gem_destroy_shadow_plane_state - cleans up shadow-buffered plane state
* @shadow_plane_state: the shadow-buffered plane state
*
* This function cleans up shadow-buffered plane state. Helpful for drivers that
* subclass struct drm_shadow_plane_state.
*/
void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state)
{
__drm_atomic_helper_plane_destroy_state(&shadow_plane_state->base);
}
EXPORT_SYMBOL(__drm_gem_destroy_shadow_plane_state);
/**
* drm_gem_destroy_shadow_plane_state - deletes shadow-buffered plane state
* @plane: the plane
@ -232,11 +266,26 @@ void drm_gem_destroy_shadow_plane_state(struct drm_plane *plane,
struct drm_shadow_plane_state *shadow_plane_state =
to_drm_shadow_plane_state(plane_state);
__drm_atomic_helper_plane_destroy_state(&shadow_plane_state->base);
__drm_gem_destroy_shadow_plane_state(shadow_plane_state);
kfree(shadow_plane_state);
}
EXPORT_SYMBOL(drm_gem_destroy_shadow_plane_state);
/**
* __drm_gem_reset_shadow_plane - resets a shadow-buffered plane
* @plane: the plane
* @shadow_plane_state: the shadow-buffered plane state
*
* This function resets state for shadow-buffered planes. Helpful
* for drivers that subclass struct drm_shadow_plane_state.
*/
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);
}
EXPORT_SYMBOL(__drm_gem_reset_shadow_plane);
/**
* drm_gem_reset_shadow_plane - resets a shadow-buffered plane
* @plane: the plane
@ -258,7 +307,7 @@ void drm_gem_reset_shadow_plane(struct drm_plane *plane)
shadow_plane_state = kzalloc(sizeof(*shadow_plane_state), GFP_KERNEL);
if (!shadow_plane_state)
return;
__drm_atomic_helper_plane_reset(plane, &shadow_plane_state->base);
__drm_gem_reset_shadow_plane(plane, shadow_plane_state);
}
EXPORT_SYMBOL(drm_gem_reset_shadow_plane);

6
include/drm/drm_gem_atomic_helper.h
View File

@ -53,6 +53,12 @@ to_drm_shadow_plane_state(struct drm_plane_state *state)
return container_of(state, struct drm_shadow_plane_state, base);
}
void __drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane,
struct drm_shadow_plane_state *new_shadow_plane_state);
void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state);
void __drm_gem_reset_shadow_plane(struct drm_plane *plane,
struct drm_shadow_plane_state *shadow_plane_state);
void drm_gem_reset_shadow_plane(struct drm_plane *plane);
struct drm_plane_state *drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane);
void drm_gem_destroy_shadow_plane_state(struct drm_plane *plane,