From c61eef726a78ae77b6ce223d01ea2130f465fe5c Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Tue, 23 Oct 2012 18:53:26 +0000 Subject: drm: add support for monotonic vblank timestamps Jumps in the vblank and page flip event timestamps cause trouble for clients, so we should avoid them. The timestamp we get currently with gettimeofday can jump, so use instead monotonic timestamps. For backward compatibility use a module flag to revert back to using gettimeofday timestamps. Add also a DRM_CAP_TIMESTAMP_MONOTONIC flag that is simply a read only version of the module flag, so that clients can query this without depending on sysfs. Signed-off-by: Imre Deak Signed-off-by: Dave Airlie --- include/uapi/drm/drm.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi/drm/drm.h') diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 1e3481edf062..8d1e2bbee83a 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -778,6 +778,7 @@ struct drm_event_vblank { #define DRM_CAP_DUMB_PREFERRED_DEPTH 0x3 #define DRM_CAP_DUMB_PREFER_SHADOW 0x4 #define DRM_CAP_PRIME 0x5 +#define DRM_CAP_TIMESTAMP_MONOTONIC 0x6 #define DRM_PRIME_CAP_IMPORT 0x1 #define DRM_PRIME_CAP_EXPORT 0x2 -- cgit v1.2.1