drm/amd/display: Implement dm_get_timestamp

We use this to ensure we wait at least 500ms in between eDP
disable/enable.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
index 89342b4..fe29125 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c
@@ -37,8 +37,10 @@
 
 unsigned long long dm_get_timestamp(struct dc_context *ctx)
 {
-       /* TODO: return actual timestamp */
-       return 0;
+       struct timespec64 time;
+
+       getrawmonotonic64(&time);
+       return timespec64_to_ns(&time);
 }
 
 void dm_perf_trace_timestamp(const char *func_name, unsigned int line)