Re: [v4,1/3] drm/msm: Add support for GPU cooling

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On 10/30/2020 2:18 AM, mka@xxxxxxxxxxxx wrote:
On Thu, Oct 29, 2020 at 01:37:19PM +0530, Akhil P Oommen wrote:
Register GPU as a devfreq cooling device so that it can be passively
cooled by the thermal framework.

Signed-off-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxx>
Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>

Wait, I did not post a 'Reviewed-by' tag for this patch!

I think the patch should be ok, but I'm still not super happy
about the resource management involving devfreq in general (see
discussion on https://patchwork.freedesktop.org/patch/394291/?series=82476&rev=1).
It's not really something introduced by this patch, but if it ever
gets fixed releasing the cooling device at the end of
msm_gpu_cleanup() after everything else might cause trouble.

In summary, I'm supportive of landing this patch, but reluctant to
'sign it off' because of the above.

In any case:

Tested-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Sorry, Matthias. My mistake. You shared the reviewed tag for the dt-bindings update. Will fix this ASAP. Thanks for verifying this.

-Akhil.
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