powering off the GPU

[James Courtier-Dutton]

On 16 April 2018 at 11:07, Lucas Stach <l.stach at pengutronix.de> wrote:
> Am Sonntag, den 15.04.2018, 19:19 +0200 schrieb Wladimir J. van der
> Laan:
>> On Sun, Apr 15, 2018 at 04:48:34PM +0100, James Courtier-Dutton
>> wrote:
>> > Hi,
>> >
>> > Is there any way to power off the GPU without powering off the
>> > whole device?
>> > When the machine is idle, I would like the GPU to power down.
>>
>> The hardware supports this, but I don't think the etnaviv kernel driver currently
>> has this functionalty implemented.
>
> It has. We are powering down the GPU after 200ms of inactivity. If
> userspace is idle and doesn't submit graphics work, the kernel will
> automatically cut clocks and power from the GPU.
>

Great news. Is there some way for me to tell if this is happening.
cat /sys/....    some file to tell or something like that?

Kind Regards

James