> On Jun 28, 2017, at 4:20 AM, David Airlie <airl...@redhat.com> wrote:
>
>
>> I ran into this today:
>> https://gist.github.com/Brainiarc7/aa43570f512906e882ad6cdd835efe57
>>
>> DRM firmware is loaded by default. HuC and GuC are not. Things work
>> without them, and things work with them loaded. So what's the pro/con
>> and if there's a pro, why isn't it the kernel default? Seems like if
>> it should be default, either upstream should set them as the default,
>> or the CPU/GPU should ask for it?
>
> I expect when upstream decided they are stable and useful enough, upstream
> will enable them. I'm not fully sure how useful they are, I think they
> might possibly enable lower power states, but also nasty bugs.
>
>
HUC is used for bit rate control when using the low power fixed function AVC
encoder(vdenc) on supported platforms. (Libva/intel-vapid-driver)
> Dave.
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