On Jun 28, 2017, at 4:20 AM, David Airlie <airlied(a)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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