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authorImre Deak <imre.deak@intel.com>2012-10-23 18:53:26 +0000
committerDave Airlie <airlied@redhat.com>2012-11-20 16:06:16 +1000
commitc61eef726a78ae77b6ce223d01ea2130f465fe5c (patch)
tree7bd310556195005b5c4c1cbadadc9da1fbf5163c /include/drm
parente62f2f5acba1d466da047983ae16f6b96b68b310 (diff)
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 <imre.deak@intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drmP.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 29eb23799aa4..fad21c927a38 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1505,6 +1505,7 @@ extern unsigned int drm_debug;
extern unsigned int drm_vblank_offdelay;
extern unsigned int drm_timestamp_precision;
+extern unsigned int drm_timestamp_monotonic;
extern struct class *drm_class;
extern struct proc_dir_entry *drm_proc_root;