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ucm: improve jack configuration documentation

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Signed-off-by: Tanu Kaskinen <tanu.kaskinen@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Tanu Kaskinen 2015-03-05 14:51:58 +02:00 • committed by Takashi Iwai
parent 72aa0f8332
commit ecb38d2bec
1 changed files with 18 additions and 6 deletions
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24
include/use-case.h
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@ -301,12 +301,24 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
* - name of capture mixer
* - CaptureMixerID
* - mixer capture ID
* - JackDev
* - jack device name
* - JackControl
* - jack control name
* - JackHWMute
* - indicate if the HW mutes a device on jack insertion or not.
* - JackControl, JackDev, JackHWMute
* - Jack information for a device. The jack status can be reported via
* a kcontrol and/or via an input device. **JackControl** is the
* kcontrol name of the jack, and **JackDev** is the input device id of
* the jack (if the full input device path is /dev/input/by-id/foo, the
* JackDev value should be "foo"). UCM configuration files should
* contain both JackControl and JackDev when possible, because
* applications are likely to support only one or the other.
*
* If **JackHWMute** is set, it indicates that when the jack is plugged
* in, the hardware automatically mutes some other device. The
* JackHWMute value is the name of the muted device. Note that
* JackHWMute should be used only when the hardware enforces the
* automatic muting. If the hardware doesn't enforce any muting, it may
* still be tempting to set JackHWMute to trick upper software layers to
* e.g. automatically mute speakers when headphones are plugged in, but
* that's application policy configuration that doesn't belong to UCM
* configuration files.
*/
int snd_use_case_get(snd_use_case_mgr_t *uc_mgr,
const char *identifier,