[alsa-devel] Again about regression introduced by commit 70d435ba1cd6 ("ASoC: imx-pcm-dma: simplify pcm_config")

[Kalle Kankare]

2017-11-17 16:32 GMT+02:00 Lucas Stach <l.stach at pengutronix.de>:
> Hi Kalle,
>
> Am Freitag, den 17.11.2017, 16:27 +0200 schrieb Kalle Kankare:
>> Hi,
>>
>> The regression was previously discussed on this mailing list last
>> month (2017-10-04).
>>
>> As in the previous discussion, this commit restricts the supported
>> sound formats to S24_LE. This problem is experienced in our iMX6q
>> based hardware with SGTL5000 sound chip. I.e.:
>>
>> # arecord -l | grep 'card 0' -A2
>> card 0: imx6qba16sgtl50 [imx6q-ba16-sgtl5000], device 0: HiFi
>> sgtl5000-0 []
>>   Subdevices: 1/1
>>   Subdevice #0: subdevice #0
>>
>> In kernel 4.11.0:
>>
>> # arecord --dump-hw-params -D hw:0,0 2>&1 | grep '^FORMAT'
>> FORMAT:  S16_LE
>>
>> And in now in kernel 4.13.3:
>>
>> # arecord --dump-hw-params -D hw:0,0 2>&1 | grep '^FORMAT'
>> FORMAT:  S24_LE
>>
>> By reverting the mentioned commit 70d435ba1cd6, the format returned
>> to S16_LE. However, I'm unsure if that is the proper way to solve
>> this issue. I.e. does reverting the mentioned commit cause some other
>> unwanted effect ?
>>
>> What would be the best solution that would make the S16_LE format
>> supported again for SGTL5000 ?
>
> Please cherry-pick f9d4a398f121 (dmaengine: imx-sdma: Correct
> src_addr_widths and directions) from current Linus mainline tree.
>

Thank you. The commit fixes the issue.

> Regards,
> Lucas