[PATCH 2/2] drm/amdgpu: Use mod_delayed_work in JPEG/UVD/VCE/VCN ring_end_use hooks

[Zhu, James]

[AMD Official Use Only]

This patch is Reviewed-by: James Zhu <James.Zhu at amd.com>


Thanks & Best Regards!


James Zhu

________________________________
From: Alex Deucher <alexdeucher at gmail.com>
Sent: Wednesday, August 11, 2021 4:34 PM
To: Michel Dänzer <michel at daenzer.net>
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Koenig, Christian <Christian.Koenig at amd.com>; Liu, Leo <Leo.Liu at amd.com>; Zhu, James <James.Zhu at amd.com>; amd-gfx list <amd-gfx at lists.freedesktop.org>; Maling list - DRI developers <dri-devel at lists.freedesktop.org>
Subject: Re: [PATCH 2/2] drm/amdgpu: Use mod_delayed_work in JPEG/UVD/VCE/VCN ring_end_use hooks

On Wed, Aug 11, 2021 at 12:52 PM Michel Dänzer <michel at daenzer.net> wrote:
>
> From: Michel Dänzer <mdaenzer at redhat.com>
>
> In contrast to schedule_delayed_work, this pushes back the work if it
> was already scheduled before. Specific behaviour change:
>
> Before:
>
> The scheduled work ran ~1 second after the first time ring_end_use was
> called, even if the ring was used again during that second.
>
> After:
>
> The scheduled work runs ~1 second after the last time ring_end_use is
> called.
>
> Inspired by the corresponding change in amdgpu_gfx_off_ctrl. While I
> haven't run into specific issues in this case, the new behaviour makes
> more sense to me.
>
> Signed-off-by: Michel Dänzer <mdaenzer at redhat.com>

Makes sense to me.  Applied the series.

Thanks!

Alex


> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c | 2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c  | 2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c  | 2 +-
>  drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c    | 2 +-
>  4 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c
> index 8996cb4ed57a..2c0040153f6c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c
> @@ -110,7 +110,7 @@ void amdgpu_jpeg_ring_begin_use(struct amdgpu_ring *ring)
>  void amdgpu_jpeg_ring_end_use(struct amdgpu_ring *ring)
>  {
>         atomic_dec(&ring->adev->jpeg.total_submission_cnt);
> -       schedule_delayed_work(&ring->adev->jpeg.idle_work, JPEG_IDLE_TIMEOUT);
> +       mod_delayed_work(system_wq, &ring->adev->jpeg.idle_work, JPEG_IDLE_TIMEOUT);
>  }
>
>  int amdgpu_jpeg_dec_ring_test_ring(struct amdgpu_ring *ring)
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> index 0f576f294d8a..b6b1d7eeb8e5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
> @@ -1283,7 +1283,7 @@ void amdgpu_uvd_ring_begin_use(struct amdgpu_ring *ring)
>  void amdgpu_uvd_ring_end_use(struct amdgpu_ring *ring)
>  {
>         if (!amdgpu_sriov_vf(ring->adev))
> -               schedule_delayed_work(&ring->adev->uvd.idle_work, UVD_IDLE_TIMEOUT);
> +               mod_delayed_work(system_wq, &ring->adev->uvd.idle_work, UVD_IDLE_TIMEOUT);
>  }
>
>  /**
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> index 1ae7f824adc7..2253c18a6688 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> @@ -401,7 +401,7 @@ void amdgpu_vce_ring_begin_use(struct amdgpu_ring *ring)
>  void amdgpu_vce_ring_end_use(struct amdgpu_ring *ring)
>  {
>         if (!amdgpu_sriov_vf(ring->adev))
> -               schedule_delayed_work(&ring->adev->vce.idle_work, VCE_IDLE_TIMEOUT);
> +               mod_delayed_work(system_wq, &ring->adev->vce.idle_work, VCE_IDLE_TIMEOUT);
>  }
>
>  /**
> diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
> index 284bb42d6c86..d5937ab5ac80 100644
> --- a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c
> @@ -1874,7 +1874,7 @@ void vcn_v1_0_set_pg_for_begin_use(struct amdgpu_ring *ring, bool set_clocks)
>
>  void vcn_v1_0_ring_end_use(struct amdgpu_ring *ring)
>  {
> -       schedule_delayed_work(&ring->adev->vcn.idle_work, VCN_IDLE_TIMEOUT);
> +       mod_delayed_work(system_wq, &ring->adev->vcn.idle_work, VCN_IDLE_TIMEOUT);
>         mutex_unlock(&ring->adev->vcn.vcn1_jpeg1_workaround);
>  }
>
> --
> 2.32.0
>
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