alsa: cover Headphone2 mixer element

As seen on some drivers:

https://bugzilla.redhat.com/show_bug.cgi?id=498612

src/Makefile.am

@@ -143,6 +143,7 @@ EXTRA_DIST = \
 		modules/alsa/mixer/paths/analog-output.conf \
 		modules/alsa/mixer/paths/analog-output.conf.common \
 		modules/alsa/mixer/paths/analog-output-headphones.conf \
+		modules/alsa/mixer/paths/analog-output-headphones-2.conf \
 		modules/alsa/mixer/paths/analog-output-lfe-on-mono.conf \
 		modules/alsa/mixer/paths/analog-output-mono.conf
 

src/modules/alsa/mixer/paths/analog-output-headphones-2.conf

@@ -0,0 +1,79 @@
+# This file is part of PulseAudio.
+#
+# PulseAudio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 2.1 of the
+# License, or (at your option) any later version.
+#
+# PulseAudio is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with PulseAudio; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+; Path for mixers that have a 'Headphone2' control
+;
+; See analog-output.conf.common for an explanation on the directives
+
+[General]
+priority = 90
+
+[Element Hardware Master]
+switch = mute
+volume = merge
+override-map.1 = all
+override-map.2 = all-left,all-right
+
+[Element Master]
+switch = mute
+volume = merge
+override-map.1 = all
+override-map.2 = all-left,all-right
+
+[Element Master Mono]
+switch = off
+volume = off
+
+[Element Headphone]
+switch = off
+volume = off
+
+[Element Headphone2]
+required = any
+switch = mute
+volume = merge
+override-map.1 = all
+override-map.2 = all-left,all-right
+
+[Element Speaker]
+switch = off
+volume = off
+
+[Element Front]
+switch = off
+volume = off
+
+[Element Rear]
+switch = off
+volume = off
+
+[Element Surround]
+switch = off
+volume = off
+
+[Element Side]
+switch = off
+volume = off
+
+[Element Center]
+switch = off
+volume = off
+
+[Element LFE]
+switch = off
+volume = off
+
+.include analog-output.conf.common

src/modules/alsa/mixer/paths/analog-output-headphones.conf

@@ -44,6 +44,10 @@ volume = merge
 override-map.1 = all
 override-map.2 = all-left,all-right
 
+[Element Headphone2]
+switch = off
+volume = off
+
 [Element Speaker]
 switch = off
 volume = off

src/modules/alsa/mixer/profile-sets/default.conf

@@ -62,14 +62,14 @@ auto-profiles = yes
 [Mapping analog-mono]
 device-strings = hw:%f
 channel-map = mono
-paths-output = analog-output analog-output-headphones analog-output-mono analog-output-lfe-on-mono
+paths-output = analog-output analog-output-headphones analog-output-headphones-2 analog-output-mono analog-output-lfe-on-mono
 paths-input = analog-input analog-input-mic analog-input-linein analog-input-aux analog-input-video analog-input-tvtuner analog-input-fm analog-input-mic-line
 priority = 1
 
 [Mapping analog-stereo]
 device-strings = front:%f hw:%f
 channel-map = left,right
-paths-output = analog-output analog-output-headphones analog-output-mono analog-output-lfe-on-mono
+paths-output = analog-output analog-output-headphones analog-output-headphones-2 analog-output-mono analog-output-lfe-on-mono
 paths-input = analog-input analog-input-mic analog-input-linein analog-input-aux analog-input-video analog-input-tvtuner analog-input-fm analog-input-mic-line
 priority = 10