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| author | Hans de Goede <hdegoede@redhat.com> | 2021-02-26 15:38:14 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-03-01 14:11:27 +0000 |
| commit | e4ffab875d32bf4ffa37b5cd725ace9e15d1707d (patch) | |
| tree | 8b9c5fecc51512a52c7a53c251c22510ef767b0f /scripts/gdb/linux/timerlist.py | |
| parent | 24a7b77daed8f973bf8a5ed2f83344f44f9f6396 (diff) | |
ASoC: rt5651: Fix dac- and adc- vol-tlv values being off by a factor of 10
The adc_vol_tlv volume-control has a range from -17.625 dB to +30 dB,
not -176.25 dB to + 300 dB. This wrong scale is esp. a problem in userspace
apps which translate the dB scale to a linear scale. With the logarithmic
dB scale being of by a factor of 10 we loose all precision in the lower
area of the range when apps translate things to a linear scale.
E.g. the 0 dB default, which corresponds with a value of 47 of the
0 - 127 range for the control, would be shown as 0/100 in alsa-mixer.
Since the centi-dB values used in the TLV struct cannot represent the
0.375 dB step size used by these controls, change the TLV definition
for them to specify a min and max value instead of min + stepsize.
Note this mirrors commit 3f31f7d9b540 ("ASoC: rt5670: Fix dac- and adc-
vol-tlv values being off by a factor of 10") which made the exact same
change to the rt5670 codec driver.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210226143817.84287-3-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'scripts/gdb/linux/timerlist.py')
0 files changed, 0 insertions, 0 deletions
