MycroftOS: System changes related to sound and restoring them.

buildroot-external/package/prepare_system-service/prepare_system

@@ -3,10 +3,19 @@
 set -x
 exec 1>/var/log/$(basename $0).log 2>&1
 
+mkdir -p /boot
+mount -t vfat /dev/mmcblk0p1 /boot
+
+echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
+
+rm /var/lib/alsa/asound.state
 rm /etc/pulse/default.pa
 rm /etc/pulse/system.pa
 rm /etc/pulse/daemon.conf
 
+ln -s /var/lib/alsa/default-asound.state /var/lib/alsa/asound.state
 ln -s /etc/pulse/pulseaudio-default.pa /etc/pulse/default.pa
 ln -s /etc/pulse/pulseaudio-system.pa /etc/pulse/system.pa
 ln -s /etc/pulse/pulseaudio-daemon.conf /etc/pulse/daemon.conf
+
+alsactl restore

buildroot-external/package/respeaker/respeaker.mk

@@ -21,6 +21,9 @@ define RESPEAKER_INSTALL_TARGET_CMDS
 	$(INSTALL) -D -m 0644 $(BR2_EXTERNAL_MYCROFTOS_PATH)/package/respeaker/respeaker.conf \
 		$(TARGET_DIR)/etc/modules-load.d/respeaker.conf
 
+	mkdir -p $(TARGET_DIR)/etc/voicecard
+	$(INSTALL) -D -m 0644 $(@D)/*.state $(TARGET_DIR)/etc/voicecard
+
 	$(INSTALL) -D -m 0755 $(BR2_EXTERNAL_MYCROFTOS_PATH)/package/respeaker/seeed-voicecard \
 		$(TARGET_DIR)/usr/bin
 

buildroot-external/package/respeaker/seeed-voicecard

@@ -22,8 +22,6 @@
 
 set -x
 exec 1>/var/log/$(basename $0).log 2>&1
-mkdir -p /boot
-mount -t vfat /dev/mmcblk0p1 /boot
 
 #enable i2c interface
 dtparam i2c_arm=on
@@ -93,11 +91,13 @@ overlay=""
 if [ "x${is_1a}" != "x" ] && [ "x${is_35}" == "x" ] ; then
     echo "install 2mic"
     overlay=seeed-2mic-voicecard
+    asound_state=/etc/voicecard/wm8960_asound.state
 fi
 
 if [ "x${is_3b}" != "x" ] && [ "x${is_35}" == "x" ] ; then
     echo "install 4mic"
     overlay=seeed-4mic-voicecard
+    asound_state=/etc/voicecard/ac108_asound.state
     pulse_default=/etc/pulse/seeed-voicecard-4mic-default.pa
     pulse_daemon=/etc/pulse/seeed-voicecard-4mic-daemon.conf
 fi
@@ -105,6 +105,7 @@ fi
 if [ "x${is_3b}" != "x" ] && [ "x${is_35}" != "x" ] ; then
     echo "install 6mic"
     overlay=seeed-8mic-voicecard
+    asound_state=/etc/voicecard/ac108_6mic.state
     pulse_default=/etc/pulse/seeed-voicecard-8mic-default.pa
     pulse_daemon=/etc/pulse/seeed-voicecard-8mic-daemon.conf
 fi
@@ -113,6 +114,7 @@ if [ "$overlay" ]; then
     echo Install $overlay ...
 
     # Remove old configuration
+    rm /var/lib/alsa/asound.state
     rm /etc/pulse/default.pa
     rm /etc/pulse/system.pa
     rm /etc/pulse/daemon.conf
@@ -135,6 +137,10 @@ if [ "$overlay" ]; then
     #make sure the driver loads correctly
     dtoverlay $overlay || true
 
+    #install soundstate
+    echo "create $overlay asound status file"
+    ln -s $asound_state /var/lib/alsa/asound.state
+
     #install pulseaudio files
     echo "create $overlay pulse default file"
     ln -s $pulse_default /etc/pulse/default.pa
@@ -144,4 +150,6 @@ if [ "$overlay" ]; then
     ln -s $pulse_daemon /etc/pulse/daemon.conf
 fi
 
+alsactl restore
+
 touch /var/lock/seeed-voicecard

buildroot-external/rootfs-overlay/var/lib/alsa/default-asound.state

@@ -0,0 +1,58 @@
+state.ALSA {
+        control.1 {
+                iface MIXER
+                name 'PCM Playback Volume'
+                value -31
+                comment {
+                        access 'read write'
+                        type INTEGER
+                        count 1
+                        range '-10239 - 400'
+                        dbmin -9999999
+                        dbmax 400
+                        dbvalue.0 -31
+                }
+        }
+        control.2 {
+                iface MIXER
+                name 'PCM Playback Switch'
+                value true
+                comment {
+                        access 'read write'
+                        type BOOLEAN
+                        count 1
+                }
+        }
+        control.3 {
+                iface MIXER
+                name 'PCM Playback Route'
+                value 0
+                comment {
+                        access 'read write'
+                        type INTEGER
+                        count 1
+                        range '0 - 3'
+                }
+        }
+        control.4 {
+                iface PCM
+                name 'IEC958 Playback Default'
+                value '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+                comment {
+                        access 'read write'
+                        type IEC958
+                        count 1
+                }
+        }
+        control.5 {
+                iface PCM
+                name 'IEC958 Playback Con Mask'
+                value '0200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+                comment {
+                        access read
+                        type IEC958
+                        count 1
+                }
+        }
+}
+