diff options
| author | Rob Clark <robdclark@chromium.org> | 2021-03-24 18:23:53 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-04-07 11:05:43 -0700 |
| commit | 3ab1c5cc3939b3322ebd27a44b8ee6a16eccc9f5 (patch) | |
| tree | 4313f000ef830dc2c652e49f125e50629b7f44ac /drivers/gpu/drm/msm/msm_gpu.c | |
| parent | f5b1a878435061f254bd1cd8c5cba306838d9236 (diff) | |
| download | linux-3ab1c5cc3939b3322ebd27a44b8ee6a16eccc9f5.tar.bz2 | |
drm/msm: Add param for userspace to query suspend count
Performance counts, and ALWAYS_ON counters used for capturing GPU
timestamps, lose their state across suspend/resume cycles. Userspace
tooling for performance monitoring needs to be aware of this. For
example, after a suspend userspace needs to recalibrate it's offset
between CPU and GPU time.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Jordan Crouse <jordan@cosmicpenguin.net>
Link: https://lore.kernel.org/r/20210325012358.1759770-3-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gpu.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gpu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index ab7c167b0623..9dd1c58430ab 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -251,6 +251,8 @@ int msm_gpu_pm_suspend(struct msm_gpu *gpu) if (ret) return ret; + gpu->suspend_count++; + return 0; } |