Re: [PATCH] drm/msm: Disable frequency clamping on a630

[Amit Pundir]

On Tue, 7 Sept 2021 at 07:11, Rob Clark <robdclark@xxxxxxxxx> wrote:
>
> One thing I thought of, which would be worth ruling out, is whether
> this issue only occurs with freq changes immediately after resuming
> the GPU, vs freq changes in general.  Could you try the below patch.
> And if it "fixes" the issue, then try reducing the delay until you
> start seeing GPU hangs again.

It doesn't fix the crash and I can still reproduce it
https://pastebin.com/raw/bxK4mAhB

>
> ----------
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 40c9fef457a4..278b85207ea3 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -1513,6 +1513,8 @@ static int a6xx_pm_resume(struct msm_gpu *gpu)
>   if (ret)
>   return ret;
>
> + msleep(5);
> +
>   msm_devfreq_resume(gpu);
>
>   a6xx_llc_activate(a6xx_gpu);
> ----------
>
> BR,
> -R