[alsa-devel] [PATCH 07/11] ucm: docs: Add CaptureChannelMap

Curtis Malainey cujomalainey at chromium.org
Thu Nov 7 02:58:04 CET 2019


Add ucm value to tell userspace to remap channels. This is useful for
systems with DMICs where there may be more channels than active
channels.

Signed-off-by: Curtis Malainey <cujomalainey at chromium.org>
---
 include/use-case.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/use-case.h b/include/use-case.h
index 1aeaf9d4..31f9e4be 100644
--- a/include/use-case.h
+++ b/include/use-case.h
@@ -301,6 +301,10 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
  *      - name of capture mixer
  *   - CaptureMixerID
  *      - mixer capture ID
+ *   - CaptureChannelMap
+ *      - Remap channels using ALSA PCM channel mapping API notation
+ *        E.g. "2 3 0 1 -1 -1 -1 -1 -1 -1 -1" means, FL takes channel 2,
+ *        FR takes channel 3, RL takes channel 0, RL takes channel 1.
  *   - EDIDFile
  *      - Path to EDID file for HDMI devices
  *   - JackControl, JackDev, JackHWMute
-- 
2.24.0.432.g9d3f5f5b63-goog



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