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drm: Add page_flip_target CRTC hook v2

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Mostly the same as the existing page_flip hook, but takes an additional
parameter specifying the target vertical blank period when the flip
should take effect.

v2:
* Add curly braces around else statement corresponding to an if block
  with curly braces (Alex Deucher)
* Call drm_crtc_vblank_put in the error case (Daniel Vetter)
* Clarify entry point documentation comment (Daniel Vetter)

Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer
2016-08-08 16:23:03 +09:00
committed by Alex Deucher
parent 88afb9e6cd
commit c229bfbbd0
2 changed files with 40 additions and 4 deletions
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18
include/drm/drm_crtc.h
View File

@@ -580,6 +580,24 @@ struct drm_crtc_funcs {
struct drm_pending_vblank_event *event,
uint32_t flags);
/**
* @page_flip_target:
*
* Same as @page_flip but with an additional parameter specifying the
* absolute target vertical blank period (as reported by
* drm_crtc_vblank_count()) when the flip should take effect.
*
* Note that the core code calls drm_crtc_vblank_get before this entry
* point, and will call drm_crtc_vblank_put if this entry point returns
* any non-0 error code. It's the driver's responsibility to call
* drm_crtc_vblank_put after this entry point returns 0, typically when
* the flip completes.
*/
int (*page_flip_target)(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags, uint32_t target);
/**
* @set_property:
*