Hi all, is it possible to turn on some codec mixer switch in the device
tree?
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";
+ simple-audio-card,format = "i2s";
+ simple-audio-card,mclk-fs = <256>;
+
+ simple-audio-card,widgets =
+ "Microphone", "Mic Jack",
+ "Headphone", "Headphones";
+ simple-audio-card,routing =
+ "LINPUT1", "Mic Jack",
+ "Headphone Amp INL", "LOUT2",
+ "Headphone Amp INR", "ROUT2",
+ "Headphones", "Headphone Amp OUTL",
+ "Headphones", "Headphone Amp OUTR";
+
+ simple-audio-card,hp-det-gpio = <&gpio2 RK_PA6 GPIO_ACTIVE_HIGH>;
+ simple-audio-card,aux-devs = <&headphones_amp>;
+ simple-audio-card,pin-switches = "Headphones";
+
+ simple-audio-card,cpu {
+ sound-dai = <&i2s1>;
+ };
+
+ simple-audio-card,codec {
+ sound-dai = <&es8388>;
+ };
+ };
+
--
Best Regards!
Levin Du
