[Sound-open-firmware] SoF support for 8086:9d71?

[Kai-Heng Feng]

On Mon, Dec 14, 2020 at 13:33, Pierre-Louis Bossart 
<pierre-louis.bossart at linux.intel.com> wrote:
> 
>> On more recent kernels legacy HDA stops working for device 8086:9d71:
>> [   47.211381] snd_hda_intel 0000:00:1f.3: DSP detected with PCI 
>> class/subclass/prog-if info 0x040100
>> [   47.211383] snd_hda_intel 0000:00:1f.3: Digital mics found on 
>> Skylake+ platform, using SST driver
>> 
>> However, only legacy HDA supports it:
>> 00:1f.3 Multimedia audio controller [0401]: Intel Corporation 
>> Sunrise Point-LP HD Audio [8086:9d71] (rev 21)
>> ..
>>      Kernel modules: snd_hda_intel
>> 
>> Ubuntu kernel doesn't select SND_SOC_INTEL_SKYLAKE, which builds 
>> snd-soc-skl, because based on the Kconfig description SOF should 
>> support it.
>> 
>> I wonder if SND_SOC_INTEL_SKYLAKE should be select again?
> 
> SOF does not support Skylake and Kabylake, and only the Up2 board for 
> APL. I am not sure what you mean by 'recent' kernels since this 
> dynamic selection has been in place for a year now?

Ubuntu kernel only changed this in 20.10 release.

> 
> At any rate, to make this work again:
> 
> 1. You can select SND_SOC_INTEL_SKYLAKE or alternatively to be more 
> accurate:
> 
> SND_SOC_INTEL_SKL
> SND_SOC_INTEL_APL
> SND_SOC_INTEL_KBL
> 
> There are known issues with Conexant codecs, typically on HP devices, 
> only Realtek codecs are supported.

Right, so we can't really enable this for generic distros like Ubuntu.

Let me think of a more generic solution.

Kai-Heng

> 
> 2. In addition you will need to have the topology for SKL/KBL w/ 
> HDaudio codecs. It's in alsa-topology-conf but would need to be 
> compiled and installed.
> 
> 3. UCM files should be already handled in alsa-ucm-conf
> 
> Hope this helps
> -Pierre