codama-tinker-driver

codama driver for Tinker Board S

build and install

build, install driver

$ sudo make KERNEL_SRC=/lib/modules/$(uname -r)/build all ARCH=arm
$ sudo make KERNEL_SRC=/lib/modules/$(uname -r)/build install ARCH=arm

insert overlay driver setting Add last line in /boot/hw_intf.conf

intf:dtoverlay=codama-soundcard

Change Alsa default card setting to "1" (/usr/share/alsa/alsa.conf)

defaults.ctl.card 1
defaults.pcm.card 1

Use alsa soft volume. Add setting to "/etc/asound.conf"

pcm.i2s_16k {
	type hw
	card 1
	nonblock 1
	format S32_LE
	channels 2
	rate 16000
}

pcm.VocalFusion {
	type plug
	slave.pcm {
	type softvol
	slave.pcm {
		type dmix
		ipc_key 256
		ipc_perm 0666
		slave.pcm "i2s_16k"
	}
	control {
		name "Playback"
		card 1
	}
    }
}

pcm.VF_Channel0_(L) {
	type plug
	slave.pcm {
	type softvol
	slave.pcm {
		type dsnoop
		ipc_key 512
		ipc_perm 0666
		slave.pcm "i2s_16k"
		bindings [0]
	}
	control {
		name "Record"
		card 1
	}
    }
}

pcm.!default {
	type asym
	capture.pcm "VF_Channel0_(L)"
	playback.pcm "VocalFusion"
}

Add 3 line in /etc/rc.local This is alsa control initialize.

# Run Alsa at startup so that alsamixer configures
arecord -d 1 > /dev/null 2>&1
aplay dummy > /dev/null 2>&1

testing version

Tinker OS 2.0.8, 2.0.10, 2.0.11, 2.1.11, 2.1.16

Tinker Board S