diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2014-08-06 14:49:54 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-08-06 22:39:28 +0200 |
| commit | 00185e667009dda907887a4f84fbd02c6e651a49 (patch) | |
| tree | 2f41e86d1ecf52e826a5958e559894cb40ab6efb /Documentation/DocBook | |
| parent | 4ed0ce3d0bccd74416ba6beb33a8a79d1617e97b (diff) | |
drm: Add dev->vblank_disable_immediate flag
Add a flag to drm_device which will cause the vblank code to bypass the
disable timer and always disable the vblank interrupt immediately when
the last reference is dropped.
v2: Add some notes about the flag to the kernel doc
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'Documentation/DocBook')
| -rw-r--r-- | Documentation/DocBook/drm.tmpl | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl index 55923d00bd52..583edbffff1a 100644 --- a/Documentation/DocBook/drm.tmpl +++ b/Documentation/DocBook/drm.tmpl @@ -3387,6 +3387,12 @@ void (*disable_vblank) (struct drm_device *dev, int crtc);</synopsis> module parameter or the <varname>drm_vblank_offdelay</varname> global variable and expressed in milliseconds. Its default value is 5000 ms. Zero means never disable, and a negative value means disable immediately. + Drivers may override the behaviour by setting the + <structname>drm_device</structname> + <structfield>vblank_disable_immediate</structfield> flag, which when set + causes vblank interrupts to be disabled immediately regardless of the + drm_vblank_offdelay value. The flag should only be set if there's a + properly working hardware vblank counter present. </para> <para> When a vertical blanking interrupt occurs drivers only need to call the |