Re: [PATCH 1/2] dt-bindings: display/msm/gpu: Narrow reg and reg-names for Adreno 610.0 and alike

[Krzysztof Kozlowski <krzk@kernel.org>]

On 27/12/2025 23:01, Rob Clark wrote:
> On Sat, Dec 27, 2025 at 3:05 AM Krzysztof Kozlowski
> <krzysztof.kozlowski@oss.qualcomm.com> wrote:
>>
>> DTS files for qcom,adreno-610.0 and qcom,adreno-07000200 contain only one
>> "reg" entry, not two, and the binding defines the second entry in
>> "reg-names" differently than top-level part, so just simplify it and
>> narrow to only one entry.
> 
> I'll defer to Akhil about whether this is actually needed (vs just
> incomplete gpu devcoredump support for certain GPUs).  In general
> cx_dbgc is needed to capture state for gpu devcoredump state
> snapshots, but not directly used in normal operations.  It seems
> similar to the situation with mapping gpucc as part of gmu, ie. not
> something the CPU normally deals with directly, but necessary to
> capture crash state.

I don't get why binding was added with cx_dbgc, but DTS not. Neither
binding nor DTS depends on actual usage, so I assume someone
intentionally did not want DTS to contain cx_dbgc and binding should
follow. Otherwise we should make the DTS complete and make the binding
strict (leading to warnings if DTS is not updated).

Best regards,
Krzysztof