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authorAmaury Pouly <amaury.pouly@gmail.com>2016-08-21 20:33:18 +0100
committerAmaury Pouly <amaury.pouly@gmail.com>2016-12-12 13:13:52 +0100
commit4304d47d3b19bb74a18047572fad4aa3f5c8b5b8 (patch)
treef4bdb7e3b0d474890b3280100120093d0a1071f3 /firmware/export
parent4d526df7ac7132afe91292f3821ae46853fa9984 (diff)
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tlv320: document audiohw setting based on tlv320.c
Change-Id: I7cf354cb948444595ca541a4bf70dfbcf01147f2
Diffstat (limited to 'firmware/export')
-rw-r--r--firmware/export/tlv320.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/firmware/export/tlv320.h b/firmware/export/tlv320.h
index 75f98bc..6c722bb 100644
--- a/firmware/export/tlv320.h
+++ b/firmware/export/tlv320.h
@@ -26,7 +26,8 @@
AUDIOHW_SETTING(VOLUME, "dB", 0, 1, -74, 6, -20)
#ifdef HAVE_RECORDING
- /* (x - 23)/1.5 *10 */
+/* Line in : 0 .. 31 => Volume -34.5 .. +12 dB
+ * Mic (left): 0 .. 1 => Volume +0, +20 dB */
AUDIOHW_SETTING(LEFT_GAIN, "dB", 1, 1, 0, 31, 23, (val - 23) * 15)
AUDIOHW_SETTING(RIGHT_GAIN, "dB", 1, 1, 0, 31, 23, (val - 23) * 15)
/* 0 or 20 dB */