[PATCH] drm/i915/rc6: Disable RPG during workload execution

[Nilawar, Badal]

On 23-10-2024 21:31, Nilawar, Badal wrote:
> 
> 
> On 23-10-2024 20:18, Rodrigo Vivi wrote:
>> On Wed, Oct 23, 2024 at 11:03:57AM +0530, Nilawar, Badal wrote:
>>>
>>>
>>> On 22-10-2024 22:39, Rodrigo Vivi wrote:
>>>> On Tue, Oct 22, 2024 at 03:28:43PM +0200, Andi Shyti wrote:
>>>>> Hi Badal,
>>>>>
>>>>> On Tue, Oct 22, 2024 at 06:52:26PM +0530, Badal Nilawar wrote:
>>>>>> Encountering forcewake errors related to render power gating;
>>>>>
>>>>> Can you please expand your explanation here?
>>>>
>>>> yeap. More explanation please. All platforms? really?
>>>
>>> We are seeing Render forcewake timeouts on ADLP, ADLM, ADLN, TWL, 
>>> DG1, rpl.
>>
>> Is this a regression? or a new issue?
> 
> This is old issue, first reported year back.
> 
>>
>> Is this happening with Xe on these platforms? or i915 only?
> 
> i915 only. This is not reported on Xe kmd.
> 
>>
>>> Issue disappears after disabling RPG. Instead of fully disabling RPG 
>>> I am
>>> disabling it during active submissions i.e. during unpark.
>>> For MTL and ARL RPG is already disabled permanently.
>>
>> uhm. Interesting. Why that is disabled on these platforms? 
> 
>  From commit log its temporary wa to avoid fw timeouts.
> 
> perhaps we should be
>> doing the same for all GuC enabled platforms?
> 
> I think so as temporary Wa.

Correction, DG1 we are not seeing this. I think we can go with platform 
check.

Regards,
Badal