[PATCH 3/7] ASoC: SOF: intel: hda: support also devices with 1 and 3 dmics

[Pierre-Louis Bossart]

On 8/25/20 6:50 PM, Ranjani Sridharan wrote:
> From: Jaska Uimonen <jaska.uimonen at linux.intel.com>
> 
> Currently the dmic check code supports only devices with 2 or 4 dmics.
> With other dmic counts the function will return 0. Lately we've seen
> devices with only 1 dmic thus enable also configurations with 1, and
> possibly 3, dmics. Add also topology postfix -1ch and -3ch for new dmic
> configuration.
> 
> Signed-off-by: Jaska Uimonen <jaska.uimonen at linux.intel.com>
> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> Signed-off-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>

we now have multiple reports of devices with a single microphone where 
audio is broken without this patch, e.g. 
https://github.com/thesofproject/linux/issues/2451

This patch should be applied to -stable versions all the way to 5.6. It 
would be desirable for 5.5 and 5.4 as well but it will not apply 
cleanly. It's be trivial to provide a modified patch for these earlier 
kernel versions but I don't know what the process might be here?