[Intel-gfx] [PATCH v2 1/2] drm/i915: provide interface for audio driver to query cdclk

[Lin, Mengdong]

> -----Original Message-----
> From: Lespiau, Damien
> Sent: Thursday, July 03, 2014 7:19 PM
> To: Nikula, Jani
> Cc: Lin, Mengdong; alsa-devel at alsa-project.org; tiwai at suse.de;
> intel-gfx at lists.freedesktop.org
> Subject: Re: [Intel-gfx] [PATCH v2 1/2] drm/i915: provide interface for audio
> driver to query cdclk
> 
> On Thu, Jul 03, 2014 at 10:32:38AM +0300, Jani Nikula wrote:
> > On Thu, 03 Jul 2014, mengdong.lin at intel.com wrote:
> > > From: Jani Nikula <jani.nikula at intel.com>
> >
> > I wrote this as a quick hack patch to try as an alternative to [1]
> > which ended up not working on Haswell. Please reassure me that this is
> > going to be a temporary solution until we get a more generic interface
> > between the audio and display drivers. I don't much like this, but at
> > least it's isolated and small.
> >
> > I'd like the commit message amended with something like:
> >
> > """
> > If the display power well has been disabled, the display audio
> > controller divider values EM4 MVALUE and EM5 NVALUE will have been
> > lost. The CDCLK frequency is required for reprogramming them. Provide
> > a private interface for the audio driver to query CDCLK.
> >
> > This is a stopgap solution until a more generic interface between
> > audio and display drivers has been implemented.
> > """
> >
> > I'd also like to have an additional Reviewed-by from the i915 side.
> > After that, I'm fine with merging this through alsa.
> 
> Sure.
> 
> Reviewed-by: Damien Lespiau <damien.lespiau at intel.com>
> 
> --
> Damien

Thank you, Jani and Damien!

I'll add the comment message and submit the revised patch tomorrow.

Regards
Mengdong