meta-nuc: provide a working alsa config for the nuc BSP

The nuc supports audio only via the HDMI ports. This provides an alsa
sound configuration where HDMI0 port is set as a default sound out
device.

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>

2 files changed, 25 insertions, 0 deletions

diff --git a/meta-nuc/recipes-bsp/alsa-state/alsa-state.bbappend b/meta-nuc/recipes-bsp/alsa-state/alsa-state.bbappend
new file mode 100644
index 00000000..72d991c7
--- /dev/null
+++ b/meta-nuc/recipes-bsp/alsa-state/alsa-state.bbappend
@@ -0,0 +1 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
diff --git a/meta-nuc/recipes-bsp/alsa-state/alsa-state/nuc/asound.conf b/meta-nuc/recipes-bsp/alsa-state/alsa-state/nuc/asound.conf
new file mode 100644
index 00000000..1defe77d
--- /dev/null
+++ b/meta-nuc/recipes-bsp/alsa-state/alsa-state/nuc/asound.conf
@@ -0,0 +1,24 @@
+pcm.!default {
+    type plug
+    slave.pcm "dmixer"
+}
+
+pcm.dmixer {
+    type dmix
+    ipc_key 1024
+    ipc_key_add_uid 0
+    ipc_perm 0666
+    slave {
+        pcm "hw:0,3"    # HDMI CARD AND DEVICE
+        period_time 0
+        period_size 1024
+        buffer_size 8192
+        rate 48000 #or 44100
+    }
+}
+
+ctl.dmixer {
+    type hw
+    card 0
+}
+