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

[Zhi, Yong]

Hi, Takashi,

> -----Original Message-----
> From: Takashi Iwai [mailto:tiwai at suse.de]
> Sent: Tuesday, August 7, 2018 10:41 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 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?
> 
> 

Think so if that's the case, but I am far from expert on this topic :)

> thanks,
> 
> Takashi