lkml.org 
[lkml]   [2021]   [Apr]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Freedreno] [PATCH 1/2] drm/msm: Fix a5xx/a6xx timestamps
On Wed, Mar 24, 2021 at 06:23:52PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@chromium.org>
>
> 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.

Acked-by: Jordan Crouse <jordan@cosmicpenguin.net>

> Signed-off-by: Rob Clark <robdclark@chromium.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 a5af223eaf50..bb82fcd9df81 100644
> --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> @@ -1241,8 +1241,8 @@ 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 130661898546..59718c304488 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -1173,8 +1173,8 @@ 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_GPU_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_GPU_SET);
> return 0;
> --
> 2.29.2
>
> _______________________________________________
> Freedreno mailing list
> Freedreno@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/freedreno

\
 
 \ /
  Last update: 2021-04-02 16:52    [W:0.072 / U:0.408 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site