pulseaudio: avoid headphone mute when no jack detection

Some platforms, like ccimx6ulsbc, don't support jack detection
out of the box.
PulseAudio will mute the Headphones by default if it believes
there is no headphones jack plugged-in. With this patch we
tell it to preserve ALSA default value for the headphones
controls.

Signed-off-by: Hector Palacios <hector.palacios@digi.com>

https://jira.digi.com/browse/DEL-3435

meta-digi-dey/recipes-multimedia/pulseaudio/pulseaudio/0001-pulseaudio-keep-headphones-volume-in-platforms-witho.patch

@@ -0,0 +1,41 @@
+From: Hector Palacios <hector.palacios@digi.com>
+Date: Mon, 2 Jan 2017 13:11:02 +0100
+Subject: [PATCH] pulseaudio: keep headphones volume in platforms without jack
+ detection
+
+Signed-off-by: Hector Palacios <hector.palacios@digi.com>
+---
+ src/modules/alsa/mixer/paths/analog-output-headphones.conf | 4 ++--
+ src/modules/alsa/mixer/paths/analog-output-speaker.conf    | 4 ++--
+ 2 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/modules/alsa/mixer/paths/analog-output-headphones.conf b/src/modules/alsa/mixer/paths/analog-output-headphones.conf
+index b6ee70ba84c5..ddc0918d3a12 100644
+--- a/src/modules/alsa/mixer/paths/analog-output-headphones.conf
++++ b/src/modules/alsa/mixer/paths/analog-output-headphones.conf
+@@ -81,8 +81,8 @@ override-map.2 = all-left,all-right
+
+ [Element Headphone]
+ required-any = any
+-switch = mute
+-volume = merge
++switch = on
++volume = ignore
+ override-map.1 = all
+ override-map.2 = all-left,all-right
+
+diff --git a/src/modules/alsa/mixer/paths/analog-output-speaker.conf b/src/modules/alsa/mixer/paths/analog-output-speaker.conf
+index 39193dd8851e..5183be2bbe4f 100644
+--- a/src/modules/alsa/mixer/paths/analog-output-speaker.conf
++++ b/src/modules/alsa/mixer/paths/analog-output-speaker.conf
+@@ -73,8 +73,8 @@ volume = off
+ ; This profile path is intended to control the speaker, let's mute headphones
+ ; else there will be a spike when plugging in headphones
+ [Element Headphone]
+-switch = off
+-volume = off
++switch = on
++volume = ignore
+
+ [Element Headphone2]
+ switch = off

meta-digi-dey/recipes-multimedia/pulseaudio/pulseaudio_%.bbappend

@@ -0,0 +1,7 @@
+# Copyright (C) 2017 Digi International
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/${BPN}:"
+
+SRC_URI_append_ccimx6ulsbc = " file://0001-pulseaudio-keep-headphones-volume-in-platforms-witho.patch"
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"