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drm: Make the connector dpms callback return a value, v2.

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This is required to properly handle failing dpms calls.
When making a wait in i915 interruptible, I've noticed
that the dpms sequence could fail with -ERESTARTSYS because
it was waiting interruptibly for flips. So from now on
allow drivers to fail in their connector dpms callback.

Encoder and crtc dpms callbacks are unaffected.

Changes since v1:
- Update kerneldoc for the drm helper functions.

Signed-off-by: Maarten Lankhorst <[email protected]>
[danvet: Resolve conflicts due to different merge order.]
Signed-off-by: Daniel Vetter <[email protected]>
This commit is contained in:
Maarten Lankhorst 2015-07-21 11:34:55 +02:00 • committed by Daniel Vetter
commit 9a69a9ac20
19 changed files with 65 additions and 44 deletions
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4
include/drm/drm_atomic_helper.h
View file

@ -87,8 +87,8 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags);
void drm_atomic_helper_connector_dpms(struct drm_connector *connector,
int mode);
int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
int mode);
/* default implementations for state handling */
void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);

2
include/drm/drm_crtc.h
View file

@ -527,7 +527,7 @@ struct drm_connector_state {
* etc.
*/
struct drm_connector_funcs {
void (*dpms)(struct drm_connector *connector, int mode);
int (*dpms)(struct drm_connector *connector, int mode);
void (*save)(struct drm_connector *connector);
void (*restore)(struct drm_connector *connector);
void (*reset)(struct drm_connector *connector);

2
include/drm/drm_crtc_helper.h
View file

@ -189,7 +189,7 @@ extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
extern int drm_helper_connector_dpms(struct drm_connector *connector, int mode);
extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);