Re: [PATCH linux-next] drm/amdgpu/vcn: Remove unused assignment in vcn_v4_0_stop

[Khalid Masum]

On 8/15/22 21:17, Dong, Ruijing wrote:
> [AMD Official Use Only - General]
>
> If the condition was met and it came to execute vcn_4_0_stop_dpg_mode, then it would never have a chance to go for /*wait for vcn idle*/, isn't it?

Hypothetically, some other thread might set adev->pg_flags NULL and in 
that case it will get the chance to go for /* wait for vcn idle */.


> I still didn't see obvious purpose of this change.
>
>                  if (adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) {
>       ==>              r = vcn_v4_0_stop_dpg_mode(adev, i);

Regardless of that, this assignment to r is unnecessary. Because this 
value of r is never used. This patch simply removes this unnecessary
assignment.

>                           continue;
>                   }
>
>                   /* wait for vcn idle */
>                   r = SOC15_WAIT_ON_RREG(VCN, i, regUVD_STATUS, UVD_STATUS__IDLE, 0x7);
>
> Thanks
> Ruijing

Thanks,
  -- Khalid Masum