amd-soundwire: add support for AMD generic legacy machine driver

[perexg]

The card components string is similar to Intel's SOF driver like, so we can reuse sof-soundwire configuration and it is logical to reduce future maintenance, because the chips connected to soundwire bus are similar for multiple PCI bridges.

Example of the components string:

Components : ' cfg-amp:1 hs:rt722 spk:rt722 mic:rt722'

[vijendarmukunda]

@perexg : I do have further question. Today we haven't included support for SoundWire + ACP PDM IO combination. As we are referring common soundwire conf file , for AMD platforms ACP PDM IO is different compared to Intel PCH DMIC . How it is going to be addressed?
We do have another question. Going forward we will add support for SOF Sound card for AMD platforms . If we refer common config files, how the delta between AMD & Intel platforms can be handled?

[vijendarmukunda]

Tested the PR. With this PR changes , Input device is not listed in Sound Settings

[vijendarmukunda]

@shumingfan : Could you please validate this PR changes and confirm the test result?

[perexg]

Tested the PR. With this PR changes , Input device is not listed in Sound Settings

Provide dump alsaucm -c hw:0 dump text - replace zero with the proper ALSA card number.

for AMD platforms ACP PDM IO is different compared to Intel PCH DMIC . How it is going to be addressed?

We have conditions to handle differences. But, as you can already see, most configurations are related to the soundwire codecs - not DMA drivers.

[vijendarmukunda]

amd-soundwire.zip
Attached amd-soundwire conf file for your reference.

When i run the command , with syntax 7 I got below error.

root@amd:/home/amd# alsaucm -c hw:1 dump text
ALSA lib parser.c:270:(parse_syntax_field) Incompatible syntax 7 in amd-soundwire.conf
ALSA lib main.c:1554:(snd_use_case_mgr_open) error: failed to import hw:1 use case configuration -22
alsaucm: error failed to open sound card hw:1: Invalid argument

Then I have changes syntax as 6 in amd-soundwire.conf file and tried to collect ucm dump.
I got below error.

root@amd:/home/amd# alsaucm -c hw:1 dump text
ALSA lib utils.c:364:(uc_mgr_config_load_into) could not open configuration file /usr/share/alsa/ucm2/common/pcm/hdmi.conf
ALSA lib parser.c:78:(uc_mgr_config_load_file) error: failed to open file /usr/share/alsa/ucm2/common/pcm/hdmi.conf: -2
ALSA lib main.c:1554:(snd_use_case_mgr_open) error: failed to import hw:1 use case configuration -2
alsaucm: error failed to open sound card hw:1: No such file or directory

[perexg]

• old version of alsa-lib (must be 1.2.12+)
• old version of alsa-ucm-conf files (use latest 1.2.13) - see https://github.com/alsa-project/alsa-ucm-conf/blob/master/README.md

[vijendarmukunda]

@perexg : Back ported changes to our UCM base. It's working fine. Able to list the audio endpoints correctly.