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ucm: Document PlaybackPCMIsDummy and CapturePCMIsDummy values

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At least PulseAudio needs special handling for dummy devices. To allow
that to happen automatically, the UCM configuration should contain the
information about which PCMs are dummy.

Signed-off-by: Tanu Kaskinen <tanu.kaskinen@linux.intel.com>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Tanu Kaskinen 2014-06-26 13:30:25 +03:00 • committed by Takashi Iwai
parent c2f8ef7ab0
commit 7a748af4db
1 changed files with 10 additions and 0 deletions
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10
include/use-case.h
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@ -258,7 +258,17 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
* Recommended names for values:
* TQ - Tone Quality
* PlaybackPCM - full PCM playback device name
* PlaybackPCMIsDummy - Valid values: "yes" and "no". If set to "yes", the
* PCM named by the PlaybackPCM value is a dummy device,
* meaning that opening it enables an audio path in the
* hardware, but writing to the PCM device has no
* effect.
* CapturePCM - full PCM capture device name
* CapturePCMIsDummy - Valid values: "yes" and "no". If set to "yes", the
* PCM named by the CapturePCM value is a dummy device,
* meaning that opening it enables an audio path in the
* hardware, but reading from the PCM device has no
* effect.
* PlaybackRate - playback device sample rate
* PlaybackChannels - playback device channel count
* PlaybackCTL - playback control device name