From 3ab1c5cc3939b3322ebd27a44b8ee6a16eccc9f5 Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Wed, 24 Mar 2021 18:23:53 -0700 Subject: 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 Acked-by: Jordan Crouse Link: https://lore.kernel.org/r/20210325012358.1759770-3-robdclark@gmail.com Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/gpu/drm/msm/adreno/adreno_gpu.c') diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 0f184c3dd9d9..6a35a30dd281 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -273,6 +273,9 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value) case MSM_PARAM_FAULTS: *value = gpu->global_faults; return 0; + case MSM_PARAM_SUSPENDS: + *value = gpu->suspend_count; + return 0; default: DBG("%s: invalid param: %u", gpu->name, param); return -EINVAL; -- cgit v1.2.3