[Intel-gfx] [PATCH] drm/i915/audio: Skip the cdclk modeset if no pipes attached

[Jani Nikula]

On Sat, 01 Feb 2020, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> Quoting Jani Nikula (2020-02-01 12:36:46)
>> On Sat, 01 Feb 2020, Chris Wilson <chris at chris-wilson.co.uk> wrote:
>> > If the display is not driving any pipes, we cannot change the bclk and
>> > doing so risks chasing NULL pointers:
>> 
>> Does this mean we can't probe hda if there are no displays attached at
>> boot on GLK?
>
> We do, but the question is should we. If we say there are no pipes, then
> how can there be a HDMI/other audio link?

I'll let Kai fill in the gaps, but my understanding is that you can't
even probe it then. I.e. it won't work when you *do* attach the cable.

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Graphics Center