Re: [PATCH] drm/msm/a5xx: don't read the GPMU registers on GPUs without a GPMU

[Konrad Dybcio]

On 10/1/26 3:53 AM, Dmitry Baryshkov wrote:
> On Mon, Sep 21, 2026 at 09:40:35AM +0200, Konrad Dybcio wrote:
>> On 9/20/26 1:08 PM, Dmitry Baryshkov wrote:
>>> Only a530/a540 have a GPMU.  On the other a5xx parts, reading the
>>> 0xa800-0xac60 GPMU aperture during a crashdump resets the board -- on
>>> sda660 (a512) a GPU hang thus reboots the SoC instead of recovering.
>>>
>>> Split the GPMU block into its own array and collect it only when a GPMU
>>> is present.

[...]

>> I'm not sure if there are holes in these ranges in the hw, but msm-3.18
>> (8998 kernel) simply has:
>>
>> 0xA800-0xA8FF
>> and
>> 0xAC60-0xAC60
>>
>> (both ranges inclusive)
> 
> Yes. However these tables list registers to dump. We don't need all GPMU
> registers (and even if we do, it should be a separate patch).

Fine.

GPT points out that crashdec doesn't recognize the registers-gpmu section
name, rename it to registers-gmu or fix up crashdec

any which way:

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad