On Wed, 13 Sep 2017 16:21:10 +0200,
Jörg Krause wrote:
>
> Tested with the Wolfson WM8524 DAC on a i.MX6UL board and the following
> ALSA configuration file using the pcm test utility from alsa-lib:
>
> """
> $ cat /etc/asound.conf
> pcm.!default {
> type plug
> slave.pcm "softvol"
> }
> pcm.softvol {
> type softvol
> slave {
> pcm "hw:0"
> }
> control {
> name "Master"
> card 0
> }
> }
> ctl.!default {
> type hw
> card 0
> }
> ctl.softvol {
> type hw
> card 0
> }
>
> $ pcm -D softvol -o S24_LE -c 2 -r 48000
> """
>
> The data in the Synchronous Audio Interface (SAI) of the i.MX6UL is
> aligned the following way:
>
> """
> 31 30 29 28 | 27 26 25 24 | 23 22 21 20 | .. | 3 2 1 0
> ## ## ## ## ## ## ## ## [ DATA[23:0] ]
> """
>
> Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
> ---
> v2:
> * add CONVERT_AREA_S24_LE algorithm instead of using the same one as S32_LE
Thanks, applied.
There can be more generic for S24 in general, but it's OK to take this
as the first step.
Takashi
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