[PATCH AUTOSEL 5.10 20/46] drm/msm: Fix a5xx/a6xx timestamps

Sasha Levin
2021-04-12T16:29:49Z

From: Rob Clark <robdclark@chromium.org>

[ Upstream commit 9fbd3088351b92e8c2cef6e37a39decb12a8d5bb ]

They were reading a counter that was configured to ALWAYS_COUNT (ie.
cycles that the GPU is doing something) rather than ALWAYS_ON. This
isn't the thing that userspace is looking for.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Jordan Crouse <jordan@cosmicpenguin.net>
Message-Id: <20210325012358.1759770-2-robdclark@gmail.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 ++--
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 5e11cdb207d8..0ca7e53db112 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1240,8 +1240,8 @@ static int a5xx_pm_suspend(struct msm_gpu *gpu)

static int a5xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value)
{
- *value = gpu_read64(gpu, REG_A5XX_RBBM_PERFCTR_CP_0_LO,
- REG_A5XX_RBBM_PERFCTR_CP_0_HI);
+ *value = gpu_read64(gpu, REG_A5XX_RBBM_ALWAYSON_COUNTER_LO,
+ REG_A5XX_RBBM_ALWAYSON_COUNTER_HI);

return 0;
}
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 83b50f6d6bb7..722c2fe3bfd5 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1073,8 +1073,8 @@ static int a6xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value)
/* Force the GPU power on so we can read this register */
a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET);

- *value = gpu_read64(gpu, REG_A6XX_RBBM_PERFCTR_CP_0_LO,
- REG_A6XX_RBBM_PERFCTR_CP_0_HI);
+ *value = gpu_read64(gpu, REG_A6XX_CP_ALWAYS_ON_COUNTER_LO,
+ REG_A6XX_CP_ALWAYS_ON_COUNTER_HI);

a6xx_gmu_clear_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET);
mutex_unlock(&perfcounter_oob);
--
2.30.2