Currently the ALSA jack core registers only input devices for each jack registered. These jack input devices are not readable by userspace devices that run as non root.
This patch adds support for additionally registering jack kcontrol devices for every input jack registered. This allows non root userspace to read jack status.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Modified-by: Jie Yang yang.jie@intel.com Signed-off-by: Jie Yang yang.jie@intel.com Reveiwed-by: Mark Brown broonie@kernel.org
include/sound/jack.h | 8 +++++ sound/core/jack.c | 99
++++++++++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 105 insertions(+), 2 deletions(-)
diff --git a/include/sound/jack.h b/include/sound/jack.h index 2182350..ef0f0ed 100644 --- a/include/sound/jack.h +++ b/include/sound/jack.h @@ -73,6 +73,8 @@ enum snd_jack_types {
struct snd_jack { struct input_dev *input_dev;
struct list_head kctl_list;struct snd_card *card; int registered; int type; const char *id;@@ -82,6 +84,12 @@ struct snd_jack { void (*private_free)(struct snd_jack *); };
+struct snd_jack_kctl {
struct snd_kcontrol *kctl;struct list_head jack_list; /* list of controls
belong to the same jack*/
Does it mean that those multi io jacks (line in and mic jacks of desktop) and those headphone/mic combo jack of netbook have all the input and output kctls in this list ?