[alsa-devel] [PATCH] ASoC: Intel: hdac_hdmi: Add sampling frequencies constraint

[Takashi Iwai]

On Tue, 07 Aug 2018 17:36:12 +0200,
Zhi, Yong wrote:
> 
> Hi, Takashi,
> 
> Thanks for the review.
> 
> > -----Original Message-----
> > From: Takashi Iwai [mailto:tiwai at suse.de]
> > Sent: Tuesday, August 7, 2018 10:23 AM
> > To: Zhi, Yong <yong.zhi at intel.com>
> > Cc: broonie at kernel.org; pierre-louis.bossart at linux.intel.com; alsa-
> > devel at alsa-project.org; N, Harshapriya <harshapriya.n at intel.com>;
> > vkoul at kernel.org; M, Naveen <naveen.m at intel.com>; Kale, Sanyog R
> > <sanyog.r.kale at intel.com>
> > Subject: Re: [alsa-devel] [PATCH] ASoC: Intel: hdac_hdmi: Add sampling
> > frequencies constraint
> > 
> > On Tue, 07 Aug 2018 16:56:05 +0200,
> > Yong Zhi wrote:
> > >
> > > Playback of 44.1Khz contents with HDMI plugged returns "Invalid pipe
> > > config".
> > 
> > Why?  Is it a limitation of i915 graphics side?
> > If it's a generic issue, we'd need to fix also in the legacy HDMI driver, too.
> > 
> 
> The HDMI paths in DFW topology are configured for 48Khz operation.

OK, so it's specific to this driver, not for the legacy configuration,
so far.

What if the legacy HDMI codec driver is used on top of Intel SST (as
the recent patchset "Enable HDA Codec support on Intel Platforms")?
The legacy HDMI codec driver isn't enabled there, but in theory it can
be.  I suppose that a similar workaround is required, right?


thanks,

Takashi