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drm/atomic: add drm_atomic_get_existing_*_state helpers 

There are cases where we want to test if a given object is
part of the state, but don't want to add them if they're not.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Maarten Lankhorst 2015-05-13 10:37:25 +02:00 committed by Daniel Vetter
parent f9be5f2011
commit 1b26a5e193
2 changed files with 58 additions and 10 deletions
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18
drivers/gpu/drm/drm_atomic.c
View File

@ -203,13 +203,12 @@ struct drm_crtc_state *
drm_atomic_get_crtc_state(struct drm_atomic_state *state, drm_atomic_get_crtc_state(struct drm_atomic_state *state,
struct drm_crtc *crtc) struct drm_crtc *crtc)
{ {
int ret, index; int ret, index = drm_crtc_index(crtc);
struct drm_crtc_state *crtc_state; struct drm_crtc_state *crtc_state;
index = drm_crtc_index(crtc); crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
if (crtc_state)
if (state->crtc_states[index]) return crtc_state;
return state->crtc_states[index];
ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
if (ret) if (ret)
@ -337,13 +336,12 @@ struct drm_plane_state *
drm_atomic_get_plane_state(struct drm_atomic_state *state, drm_atomic_get_plane_state(struct drm_atomic_state *state,
struct drm_plane *plane) struct drm_plane *plane)
{ {
int ret, index; int ret, index = drm_plane_index(plane);
struct drm_plane_state *plane_state; struct drm_plane_state *plane_state;
index = drm_plane_index(plane); plane_state = drm_atomic_get_existing_plane_state(state, plane);
if (plane_state)
if (state->plane_states[index]) return plane_state;
return state->plane_states[index];
ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
if (ret) if (ret)

50
include/drm/drm_atomic.h
View File

@ -54,6 +54,56 @@ int drm_atomic_connector_set_property(struct drm_connector *connector,
struct drm_connector_state *state, struct drm_property *property, struct drm_connector_state *state, struct drm_property *property,
uint64_t val); uint64_t val);
/**
* drm_atomic_get_existing_crtc_state - get crtc state, if it exists
* @state: global atomic state object
* @crtc: crtc to grab
*
* This function returns the crtc state for the given crtc, or NULL
* if the crtc is not part of the global atomic state.
*/
static inline struct drm_crtc_state *
drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
struct drm_crtc *crtc)
{
return state->crtc_states[drm_crtc_index(crtc)];
}
/**
* drm_atomic_get_existing_plane_state - get plane state, if it exists
* @state: global atomic state object
* @plane: plane to grab
*
* This function returns the plane state for the given plane, or NULL
* if the plane is not part of the global atomic state.
*/
static inline struct drm_plane_state *
drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
struct drm_plane *plane)
{
return state->plane_states[drm_plane_index(plane)];
}
/**
* drm_atomic_get_existing_connector_state - get connector state, if it exists
* @state: global atomic state object
* @connector: connector to grab
*
* This function returns the connector state for the given connector,
* or NULL if the connector is not part of the global atomic state.
*/
static inline struct drm_connector_state *
drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
struct drm_connector *connector)
{
int index = drm_connector_index(connector);
if (index >= state->num_connector)
return NULL;
return state->connector_states[index];
}
int __must_check int __must_check
drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
struct drm_crtc *crtc); struct drm_crtc *crtc);