diff options
| author | Keith Packard <keithp@keithp.com> | 2013-07-22 18:49:59 -0700 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2013-08-30 09:25:13 +1000 |
| commit | 9bba0c42ec81748462e58b18095c0eef8707cc9a (patch) | |
| tree | 807d392049250ccbb1c95426eb75a4b060389590 /include/uapi/drm | |
| parent | ed8d19756e80ec63003a93aa4d70406e6ba61522 (diff) | |
drm: Add DRM_MODE_PAGE_FLIP_ASYNC flag definition
This requests that the driver perform the page flip as soon as
possible, not necessarily waiting for vblank.
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Diffstat (limited to 'include/uapi/drm')
| -rw-r--r-- | include/uapi/drm/drm_mode.h | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 53db7cea373..550811712f7 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -412,7 +412,8 @@ struct drm_mode_crtc_lut { }; #define DRM_MODE_PAGE_FLIP_EVENT 0x01 -#define DRM_MODE_PAGE_FLIP_FLAGS DRM_MODE_PAGE_FLIP_EVENT +#define DRM_MODE_PAGE_FLIP_ASYNC 0x02 +#define DRM_MODE_PAGE_FLIP_FLAGS (DRM_MODE_PAGE_FLIP_EVENT|DRM_MODE_PAGE_FLIP_ASYNC) /* * Request a page flip on the specified crtc. @@ -426,11 +427,14 @@ struct drm_mode_crtc_lut { * flip is already pending as the ioctl is called, EBUSY will be * returned. * - * The ioctl supports one flag, DRM_MODE_PAGE_FLIP_EVENT, which will - * request that drm sends back a vblank event (see drm.h: struct - * drm_event_vblank) when the page flip is done. The user_data field - * passed in with this ioctl will be returned as the user_data field - * in the vblank event struct. + * Flag DRM_MODE_PAGE_FLIP_EVENT requests that drm sends back a vblank + * event (see drm.h: struct drm_event_vblank) when the page flip is + * done. The user_data field passed in with this ioctl will be + * returned as the user_data field in the vblank event struct. + * + * Flag DRM_MODE_PAGE_FLIP_ASYNC requests that the flip happen + * 'as soon as possible', meaning that it not delay waiting for vblank. + * This may cause tearing on the screen. * * The reserved field must be zero until we figure out something * clever to use it for. |