From: Ville Syrjälä ville.syrjala@linux.intel.com
Add a small static inline helper to grab the vblank wait queue based on the drm_crtc.
This is useful for drivers to do internal vblank waits using wait_event() & co.
v2: Pimp commit message (Daniel) Add kernel doc (Daniel)
Suggested-by: Daniel Vetter daniel@ffwll.ch Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Signed-off-by: Daniel Vetter daniel.vetter@ffwll.ch --- Documentation/DocBook/drm.tmpl | 1 + include/drm/drmP.h | 11 +++++++++++ 2 files changed, 12 insertions(+)
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl index 1d3756d3176c..972759489376 100644 --- a/Documentation/DocBook/drm.tmpl +++ b/Documentation/DocBook/drm.tmpl @@ -3400,6 +3400,7 @@ void (*disable_vblank) (struct drm_device *dev, int crtc);</synopsis> <sect2> <title>Vertical Blanking and Interrupt Handling Functions Reference</title> !Edrivers/gpu/drm/drm_irq.c +!Iinclude/drm/drmP.h drm_crtc_vblank_waitqueue </sect2> </sect1>
diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 9b6a445f8602..06a673894c47 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1372,6 +1372,17 @@ extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, extern void drm_calc_timestamping_constants(struct drm_crtc *crtc, const struct drm_display_mode *mode);
+/** + * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC + * @crtc: which CRTC's vblank waitqueue to retrieve + * + * This function returns a pointer to the vblank waitqueue for the CRTC. + * Drivers can use this to implement vblank waits using wait_event() & co. + */ +static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc) +{ + return &crtc->dev->vblank[drm_crtc_index(crtc)].queue; +}
/* Modesetting support */ extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);