Commit 9bba0c42 authored by Keith Packard's avatar Keith Packard Committed by Dave Airlie
Browse files

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: default avatarKeith Packard <keithp@keithp.com>
Signed-off-by: default avatarDave Airlie <airlied@gmail.com>
parent ed8d1975

include/uapi/drm/drm_mode.h

+10 −6
Original line number Diff line number Diff line
@@ -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.