Hi Heiko,
Thanks for your reply.
On 2021-06-29 5:32 PM, Heiko Stübner wrote:
Am Dienstag, 29. Juni 2021, 11:30:10 CEST schrieb Heiko Stübner:
Hi Levin,
Am Dienstag, 29. Juni 2021, 11:15:59 CEST schrieb Levin:
Hi all, is it possible to turn on some codec mixer switch in the device
tree?
I don't think that is appropriate and/or/ possible in the devicetree.
Instead I think you want an Alsa UCM profile for it, see:
https://github.com/alsa-project/alsa-ucm-conf/tree/master/ucm2/Rockchip
Alsa UCM profile is a complete solution, yet it requires more labor work
of adding a complex profile with all the controls.
The problem is, music/video player knows nothing of the mixers. And with
currently codec driver setting, user cannot
hear any sound until he turns on two mixer switch.
I hope to have a "simple-audio-card,switch" property here.
Currently, to hear to sound, we need to run the following commands from
the user space:
# turn on mixer switch
amixer -c 1 sset 'Left Mixer' on
amixer -c 1 sset 'Right Mixer' on
# raise volume
amixer -c 1 sset 'Output 2' 36
If these settings can be embedded into device tree, and set by kernel as
initial ALSA path settings,
user can hear the sound with zero ALSA config. That'll be great.
On 2021-06-28 11:54 AM, djw@xxxxxxxxxxxxx wrote:
+
+ es8388-sound {
+ compatible = "simple-audio-card";
+ pinctrl-names = "default";
+ pinctrl-0 = <&hp_det_pin>;
+ simple-audio-card,name = "rockchip,es8388-codec";
and I guess you'd want a more specific name as that config likely is board-specific
not for all boards using the es8388-codec?
Heiko
I got what you mean now. It should be renamed to a board-specific card
name if using Alsa UCM profile, right ?
--
Best Regards!
Levin Du
