[alsa-devel] [PATCH 2/2] ASoC: CX20442: simplify codec controller usage
jkrzyszt at tis.icnet.pl
Thu Aug 6 12:25:00 CEST 2009
This patch is a workaround for the problem of several subsequent control
statements not being applied correctly to the codec controller (modem).
In order to follow the hook switch state change from handset to handsfree
in full duplex mode, two consecutive +VLS control commands were sent to the
modem. The first one was M1 (microphone only), the seconds one was M1S1 (both
microphone and speaker). As there was no real modem handshaking procedure
implemented, neither in the codec nor in the machine driver part of the line
discipline, the modem was having the second command missed.
Since a possibility to switch to microphone only mode (and speaker only mode
as well) seams of no value, I have modified the code to issue single M1S1
command only for any of those cases.
Tested on my Amstrad Delta.
Signed-off-by: Janusz Krzysztofik <jkrzyszt at tis.icnet.pl>
--- linux-2.6.31-rc5/sound/soc/codecs/cx20442.c.orig 2009-08-04
+++ linux-2.6.31-rc5/sound/soc/codecs/cx20442.c 2009-08-05 00:56:30.000000000
@@ -138,9 +138,7 @@ static int cx20442_pm_to_v253_vls(u8 val
case (1 << CX20442_SPKOUT):
- return V253_VLS_S1;
case (1 << CX20442_MIC):
- return V253_VLS_M1;
case (1 << CX20442_SPKOUT) | (1 << CX20442_MIC):
case (1 << CX20442_TELOUT):
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