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author | Amaury Pouly <amaury.pouly@gmail.com> | 2016-08-21 20:31:55 +0100 |
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committer | Amaury Pouly <amaury.pouly@gmail.com> | 2016-12-12 13:13:13 +0100 |
commit | 4d526df7ac7132afe91292f3821ae46853fa9984 (patch) | |
tree | 628f484814189ddd023f405cfd26bd2c82e7a8c5 | |
parent | 69ea311398ed26797aec837f26b18c2e3e50744c (diff) | |
download | rockbox-4d526df7ac7132afe91292f3821ae46853fa9984.tar.gz rockbox-4d526df7ac7132afe91292f3821ae46853fa9984.zip |
wm8975: document audiohw settings
Change-Id: I0456f85e4ebc821c23e25026fbee3d8cf7526ee7
-rw-r--r-- | firmware/drivers/audio/wm8975.c | 2 | ||||
-rw-r--r-- | firmware/export/wm8975.h | 5 |
2 files changed, 7 insertions, 0 deletions
diff --git a/firmware/drivers/audio/wm8975.c b/firmware/drivers/audio/wm8975.c index 88be2cf5ce..a1af1331f2 100644 --- a/firmware/drivers/audio/wm8975.c +++ b/firmware/drivers/audio/wm8975.c | |||
@@ -296,6 +296,8 @@ void audiohw_disable_recording(void) | |||
296 | wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]); | 296 | wm8975_write(PWRMGMT1, wm8975_regs[PWRMGMT1]); |
297 | } | 297 | } |
298 | 298 | ||
299 | /* volume in 0 .. 63, corresponds to -17.25dB .. 30dB in steps of 0.75dB | ||
300 | * microphone has an extra 20dB boost so 0 .. 63 corresponds to 2.75dB .. 50dB */ | ||
299 | void audiohw_set_recvol(int left, int right, int type) | 301 | void audiohw_set_recvol(int left, int right, int type) |
300 | { | 302 | { |
301 | switch (type) | 303 | switch (type) |
diff --git a/firmware/export/wm8975.h b/firmware/export/wm8975.h index cdae7af865..b8ef17910c 100644 --- a/firmware/export/wm8975.h +++ b/firmware/export/wm8975.h | |||
@@ -29,8 +29,13 @@ AUDIOHW_SETTING(VOLUME, "dB", 0, 1, -74, 6, -25) | |||
29 | AUDIOHW_SETTING(BASS, "dB", 0, 1, -6, 9, 0) | 29 | AUDIOHW_SETTING(BASS, "dB", 0, 1, -6, 9, 0) |
30 | AUDIOHW_SETTING(TREBLE, "dB", 0, 1, -6, 9, 0) | 30 | AUDIOHW_SETTING(TREBLE, "dB", 0, 1, -6, 9, 0) |
31 | #ifdef HAVE_RECORDING | 31 | #ifdef HAVE_RECORDING |
32 | /* The input PGAs have a gain range from -17.25dB .. 30dB in steps of 0.75dB | ||
33 | * Values: 0, 1, ..., 63 | ||
34 | * => -17.25, -16.5dB, ..., 30.0dB */ | ||
32 | AUDIOHW_SETTING(LEFT_GAIN, "dB", 1, 1, 0, 63, 23, ((val - 23) * 15) / 2) | 35 | AUDIOHW_SETTING(LEFT_GAIN, "dB", 1, 1, 0, 63, 23, ((val - 23) * 15) / 2) |
33 | AUDIOHW_SETTING(RIGHT_GAIN, "dB", 1, 1, 0, 63, 23, ((val - 23) * 15) / 2) | 36 | AUDIOHW_SETTING(RIGHT_GAIN, "dB", 1, 1, 0, 63, 23, ((val - 23) * 15) / 2) |
37 | /* The microphone has an extra 20dB boost before the input PGA so 0 .. 63 | ||
38 | * corresponds to 2.75dB .. 50dB */ | ||
34 | AUDIOHW_SETTING(MIC_GAIN, "dB", 1, 1, 0, 63, 0, ((val - 23) * 15) / 2 + 200) | 39 | AUDIOHW_SETTING(MIC_GAIN, "dB", 1, 1, 0, 63, 0, ((val - 23) * 15) / 2 + 200) |
35 | #endif /* HAVE_RECORDING */ | 40 | #endif /* HAVE_RECORDING */ |
36 | 41 | ||