linux-yocto: enable audio for selected qemu targets

Fixes [BUGID #488 #734]

Enable audio for qemux86/qemux86-64 via the following kernel
configuration options.

  CONFIG_SOUND_OSS_CORE=y
  CONFIG_SOUND_OSS_CORE_PRECLAIM=y
  CONFIG_SND_RAWMIDI=m
  CONFIG_SND_SEQUENCER=y
  CONFIG_SND_OSSEMUL=y
  CONFIG_SND_MIXER_OSS=y
  CONFIG_SND_PCM_OSS=y
  CONFIG_SND_PCM_OSS_PLUGINS=y
  CONFIG_SND_SEQUENCER_OSS=y
  CONFIG_SND_RAWMIDI_SEQ=m
  CONFIG_SND_AC97_CODEC=m
  CONFIG_SND_ENS1370=m
  CONFIG_SND_INTEL8X0=m
  CONFIG_AC97_BUS=m

The mechanism to trigger these options is in the form of an
optional kernel feature that is only appended for qemux86
and qemux86-64, but is contained within the kernel tree.

This allows several things:

  - the options to be available/shared for all boards
  - the options to be in tree
  - to not add the options to every board, which unecessarily
    bloats the default configuration.

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/meta/recipes-kernel/linux/linux-yocto_git.bb b/meta/recipes-kernel/linux/linux-yocto_git.bb
index 75c6fb1653..9a3c666ae8 100644
--- a/meta/recipes-kernel/linux/linux-yocto_git.bb
+++ b/meta/recipes-kernel/linux/linux-yocto_git.bb
@@ -17,7 +17,7 @@ KMETA = meta
 
 LINUX_VERSION ?= "2.6.37"
 LINUX_VERSION_EXTENSION ?= "-yocto-${LINUX_KERNEL_TYPE}"
-PR = "r15"
+PR = "r16"
 PV = "${LINUX_VERSION}+git${SRCPV}"
 SRCREV_FORMAT = "meta_machine"
 
@@ -28,7 +28,9 @@ COMPATIBLE_MACHINE = "(qemuarm|qemux86|qemuppc|qemumips|qemux86-64|mpc8315e-rdb|
 
 # Functionality flags
 KERNEL_REVISION_CHECKING ?= "t"
-KERNEL_FEATURES=features/netfilter
+KERNEL_FEATURES="features/netfilter"
+KERNEL_FEATURES_append_qemux86=" cfg/sound"
+KERNEL_FEATURES_append_qemux86-64=" cfg/sound"
 
 # extra tasks
 addtask kernel_link_vmlinux after do_compile before do_install