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drm: Add drm_atomic_get_old/new_private_obj_state 

This pair of functions return the old/new private object state for the
given private_obj, or NULL if the private_obj is not part of the global
atomic state.

Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com>
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
This commit is contained in:
james qian wang (Arm Technology China) 2019-01-22 11:05:41 +00:00 committed by Liviu Dudau
parent 7c13e5cc23
commit 9801a7eadf
2 changed files with 50 additions and 1 deletions
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45
drivers/gpu/drm/drm_atomic.c
View File

@ -797,6 +797,50 @@ drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
}
EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
/**
* drm_atomic_get_old_private_obj_state
* @state: global atomic state object
* @obj: private_obj to grab
*
* This function returns the old private object state for the given private_obj,
* or NULL if the private_obj is not part of the global atomic state.
*/
struct drm_private_state *
drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
struct drm_private_obj *obj)
{
int i;
for (i = 0; i < state->num_private_objs; i++)
if (obj == state->private_objs[i].ptr)
return state->private_objs[i].old_state;
return NULL;
}
EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
/**
* drm_atomic_get_new_private_obj_state
* @state: global atomic state object
* @obj: private_obj to grab
*
* This function returns the new private object state for the given private_obj,
* or NULL if the private_obj is not part of the global atomic state.
*/
struct drm_private_state *
drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
struct drm_private_obj *obj)
{
int i;
for (i = 0; i < state->num_private_objs; i++)
if (obj == state->private_objs[i].ptr)
return state->private_objs[i].new_state;
return NULL;
}
EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
/**
* drm_atomic_get_connector_state - get connector state
* @state: global atomic state object
@ -1236,4 +1280,3 @@ int drm_atomic_debugfs_init(struct drm_minor *minor)
minor->debugfs_root, minor);
}
#endif

6
include/drm/drm_atomic.h
View File

@ -452,6 +452,12 @@ void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
struct drm_private_state * __must_check
drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
struct drm_private_obj *obj);
struct drm_private_state *
drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
struct drm_private_obj *obj);
struct drm_private_state *
drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
struct drm_private_obj *obj);
/**
* drm_atomic_get_existing_crtc_state - get crtc state, if it exists