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Commit 020178a1 authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Daniel Vetter
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drm: Add drm_crtc_vblank_waitqueue() 



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: default avatarDaniel Vetter <daniel@ffwll.ch>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent b95af8be

Documentation/DocBook/drm.tmpl

+1 −0
Original line number Diff line number Diff line
@@ -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>

include/drm/drmP.h

+11 −0
Original line number Diff line number Diff line
@@ -1344,6 +1344,17 @@ 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);