onboard audio: JMISC HPH wiring, UCM fix, update scripts for git deploy

2026-06-23 21:25:51 -07:00
parent a135dc4452
commit d239d58c44
22 changed files with 227 additions and 77 deletions
@@ -0,0 +1,68 @@
+# 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
+    }
+}