Re: [PATCH v7 3/4] drm/panfrost: devfreq: Disable devfreq when num_supplies > 1

[Tomeu Vizoso <tomeu.vizoso@collabora.com>]

On 1/7/21 9:49 AM, Nicolas Boichat wrote:
> On Thu, Jan 7, 2021 at 4:31 PM Tomeu Vizoso <tomeu.vizoso@collabora.com> wrote:
>>
>> On 1/7/21 9:26 AM, Nicolas Boichat wrote:
>>> GPUs with more than a single regulator (e.g. G72 on MT8183) will
>>> require platform-specific handling, disable devfreq for now.
>>>
>>> Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
>>> ---
>>>
>>> Changes in v7:
>>>    - Fix GPU ID in commit message
>>>
>>> Changes in v6:
>>>    - New change
>>>
>>>    drivers/gpu/drm/panfrost/panfrost_devfreq.c | 9 +++++++++
>>>    1 file changed, 9 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
>>> index f44d28fad085..1f49043aae73 100644
>>> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
>>> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
>>> @@ -92,6 +92,15 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
>>>        struct thermal_cooling_device *cooling;
>>>        struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
>>>
>>> +     if (pfdev->comp->num_supplies > 1) {
>>> +             /*
>>> +              * GPUs with more than 1 supply require platform-specific handling:
>>> +              * continue without devfreq
>>> +              */
>>> +             DRM_DEV_ERROR(dev, "More than 1 supply is not supported yet\n");
>>
>> Should this be info instead?
> 
> Sure, will fix in v8.

Thanks. With that change, patches 3 and 4 are R-b.

Thanks again!

Tomeu

>>
>> Regards,
>>
>> Tomeu
>>
>>> +             return 0;
>>> +     }
>>> +
>>>        opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
>>>                                              pfdev->comp->num_supplies);
>>>        if (IS_ERR(opp_table)) {
>>>