[Letux-kernel] [PATCH 0/8] Get sound playback working on the Pandora again

H. Nikolaus Schaller hns at goldelico.com
Fri Jan 7 18:02:14 CET 2022


Maybe, can you check with lsmod if the pcm1773 module has been loaded when you see no aplay -L cards?

> Am 07.01.2022 um 18:00 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
> 
> Hi,
> 
>> Am 07.01.2022 um 17:50 schrieb Stefan Leichter <sle85276 at gmx.de>:
>> 
>> Hello Grond,
>> 
>> a late happy new year and thank you for your work.
>> 
>> On 31.12.21 01:41, Grond wrote:
>>> Note that these changes only fix playback. Recording sound does not
>>> currently work for as yet unknown reasons. However, given the (mind
>>> boggling) number of ALSA kcontrols exposed by the TWL4030's sound
>>> capture codec, it is likely that there is just a switch that is turned
>>> off somewhere.
>> 
>> Today I tried on my 1GHz pandora the new kernel from hns (5.16.0-rc8-letux+) with includes you patches.
> 
> Hm. It should also include the pcm1773 driver which also makes these dmesg if it is missing.
> 
>> Did you notice in /var/log/syslog or dmesg output the line:
>> 
>> [   17.557952] omap3pandora-sound omap3pandora-sound: Failed to register sound card: -517
> 
> It is -EPROBE_DEFER meaning that some required subsystem driver has not (yet) probed.
> 
>> 
>> This can be the reason for the not working audio input. If you change in soc-core.c line 858 from dev_dbg to dev_err you will see the problem in dmesg:
>> 
>> [   17.246490] omap3pandora-sound omap3pandora-sound: ASoC: codec component pcm1773-codec not found for link PCM1773
>> 
>> One thing was driving me mad. When I login only via ssh aplay -l doesn't show any audio devices. After login on the pandora keyboard the playback device (pcm1773-hifi-0) appears and is usable.
> 
> Hm. That is indeed strange. Maybe it takes too long for the pcm1773 to initialize?
> On my 600MHz Pandora it was available immediately after boot.
> 
> At the moment I am hunting for a different bug on a different device so I can't test.
> 
> BR,
> Nikolaus
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