Re: [PATCH v2 1/3] drm/msm/a5xx: Reset the GPU when resuming it

[Konrad Dybcio]

On 10/20/26 4:05 AM, Fabricio Akio via B4 Relay wrote:
> From: Fabricio Akio <fabricioakio@xxxxxxxxx>
> 
> On SDM630, SDM660 and MSM8998 the GPU's GX power domain belongs to its
> SMMU, not to the GPU, so GX switches off only once the SMMU suspends as
> well.

This is because the DT part is a huge slop (artisinal free-range
grass-fed slop from before AI times which I partook in.. sorry!).
The ultimate fix would be to land:

https://lore.kernel.org/linux-arm-msm/20261014-topic-qc_clk_dvfs-v1-0-3041b788e9f7@xxxxxxxxxxxxxxxx/

on other SoCs we scrape by with overzealously assigning various
power domains, as all of the power requirements are managed by
RPM and other pieces of firmware. On msm8996/msm8998/sdm630/660,
that requires a long chain of HLOS-programmed values:

- VDDCX/MX from RPM
- GFX_LDO
- MEM_ACC-GFX
- CPR3/H-GFX
- GPMU on the bigger SoCs

I believe Dmitry is working on getting most of that in order and
should have something to show in the near future.

Konrad