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Stuart Longland 20630c7f59 ASoC: Fix overflow bug in SOC_DOUBLE_R_SX_TLV

When SX_TLV widgets are read, if the gain is set to a value below 0dB,
the mixer control is erroniously read as being at maximum volume.

The value read out of the CODEC register is never sign-extended, and
when the minimum value is subtracted (read; added, since the minimum is
negative) the result is a number greater than the maximum allowed value
for the control, and hence it saturates.

Solution: Mask the result so that it "wraps around", emulating
sign-extension.

Signed-off-by: Stuart Longland <redhatter@gentoo.org>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2010-06-19 02:33:44 +01:00

aoa

Merge remote branch 'origin' into secretlab/next-devicetree

2010-05-22 00:36:56 -06:00

arm

…

atmel

…

core

ALSA: pcm: fix delta calculation at boundary wraparound

2010-05-25 20:23:48 +02:00

drivers