[Intel-gfx] [RFC] drm/i915: Allow the UMD to configure their own power clock state

[Oscar Mateo]

On 05/10/2017 01:28 PM, Daniel Vetter wrote:
> On Wed, May 10, 2017 at 2:59 PM, Joonas Lahtinen
> <joonas.lahtinen at linux.intel.com> wrote:
>>> @@ -841,6 +847,11 @@ static int gen9_init_workarounds(struct intel_engine_cs *engine)
>>>        if (ret)
>>>                return ret;
>>>
>>> +     /* Allow the UMD to configure their own power clock state */
>>> +     ret = wa_ring_whitelist_reg(engine, GEN8_R_PWR_CLK_STATE);
>>> +     if (ret)
>>> +             return ret;
>> This is not a workaround, so it should be part of the cmd parser and
>> have an userspace.

cmd parser? This is Gen8+, so the cmd parser shouldn't even be active. 
Or am I missing something?

> Yeah, the "This allows userspace ..." start of the commit message
> should have been a dead giveaway that we do indeed need the userspace
> patch for this too.
> -Daniel

Yes, I got the memo :)
Dmitry has opened a ticket against intel-vaapi-driver 
(https://github.com/01org/intel-vaapi-driver/issues/152) so hopefully we 
will have a userspace soon.

-- Oscar