# ALSA configuration for I2S DAC (e.g. PCM5102, PCM5242, MAX98357)
# Installed alongside asound.conf — activate via:
#   sudo mv /etc/asound.conf /etc/asound.conf.bak
#   sudo cp /etc/asound-i2s.conf /etc/asound.conf
#
# The I2S interface on the Qualcomm DragonWing typically appears as:
#   hw:0,0   (Primary MI2S — default audio path)
#   hw:MI2S,0  (Named MI2S device)
#
# Find available devices: aplay -l

# Default PCM — try common I2S device names
pcm.!default {
    type plug
    slave {
        pcm "hw:I2S,0"
        format S16_LE
        channels 2
        rate 48000
    }
    hint.description "I2S DAC (48kHz stereo)"
}

# Fallback: try hw:0,0 if named device not found
pcm.i2s-default {
    type plug
    slave {
        pcm "hw:0,0"
        format S16_LE
        channels 2
        rate 48000
    }
}

# Software volume control (I2S DACs typically have no hardware mixer)
pcm.i2s-softvol {
    type softvol
    slave.pcm "hw:I2S,0"
    control {
        name "I2S Playback Volume"
        card I2S
    }
    min_dB -51.0
    max_dB 0.0
    resolution 256
}

# Direct hardware access (bypass plug/softvol for low latency)
pcm.i2s-direct {
    type plug
    slave {
        pcm "hw:I2S,0"
        format S16_LE
        channels 2
        rate 48000
    }
}

# Loopback test (no I2S hardware connected)
pcm.loopback {
    type plug
    slave {
        pcm "hw:Loopback,0,0"
        format S16_LE
        channels 2
        rate 48000
    }
}