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| author | Ville Syrjälä | 2014-02-19 20:29:49 +0100 |
|---|---|---|
| committer | Daniel Vetter | 2014-05-20 21:13:35 +0200 |
| commit | f2752282f7f7b566b07113dd5aa130725aa95ac4 (patch) | |
| tree | d80fa96d1fafc4a3d916d99aa6f4d664aaa49046 /include/drm/drmP.h | |
| parent | drm: Make blocking vblank wait return when the vblank interrupts get disabled (diff) | |
| download | kernel-qcow2-linux-f2752282f7f7b566b07113dd5aa130725aa95ac4.tar.gz kernel-qcow2-linux-f2752282f7f7b566b07113dd5aa130725aa95ac4.tar.xz kernel-qcow2-linux-f2752282f7f7b566b07113dd5aa130725aa95ac4.zip | |
drm: Add drm_vblank_on()
drm_vblank_off() will turn off vblank interrupts, but as long as the
refcount is elevated drm_vblank_get() will not re-enable them. This
is a problem is someone is holding a vblank reference while a modeset is
happening, and the driver requires vblank interrupt to work during that
time.
Add drm_vblank_on() as a counterpart to drm_vblank_off() which will
re-enabled vblank interrupts if the refcount is already elevated. This
will allow drivers to choose the specific places in the modeset sequence
at which vblank interrupts get disabled and enabled.
Testcase: igt/kms_flip/*-vs-suspend
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Add Testcase tag for the igt I've written.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'include/drm/drmP.h')
| -rw-r--r-- | include/drm/drmP.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 9d982d483f12..7339b2b00724 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1360,6 +1360,7 @@ extern bool drm_handle_vblank(struct drm_device *dev, int crtc); extern int drm_vblank_get(struct drm_device *dev, int crtc); extern void drm_vblank_put(struct drm_device *dev, int crtc); extern void drm_vblank_off(struct drm_device *dev, int crtc); +extern void drm_vblank_on(struct drm_device *dev, int crtc); extern void drm_vblank_cleanup(struct drm_device *dev); extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc, struct timeval *tvblank, unsigned flags); |