[Intel-gfx] [PATCH 2/2] drm/i915: move audio CDCLK constraint setup to bind/unbind

[Kai Vehmanen]

Hey Ville and others,

On Fri, 13 Mar 2020, Kai Vehmanen wrote:
> On Fri, 13 Mar 2020, Ville Syrjälä wrote:
> Now thinking of another possibility, is it possible to hook code to 
> power-up of power domains? E.g. can I hook custom code which is executed 
[...]
> If we could reprogram AUD_FREQ_CNTRL outside the get/put_power() flow 
> (i.e. independently from audio driver), and guarantee that if the display 
> side is powered on, the link params are always correct, it might be 
> possible to get away without calling get_power() from audio controller 

... no need to answer this. I made an ugly hack directly to 
intel_display_power.c and added a hook to audio restore, but, but, this 
does not seem to help. I can still hit hangs unless I bump cdclk before 
the reset -- i.e. restoring AUD_FREQ_CNTRL is not enough.

Br, Kai