This is a note to let you know that I've just added the patch titled
ASoC: codecs: msm8916-wcd-analog: fix micbias level
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-codecs-msm8916-wcd-analog-fix-micbias-level.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Dec 20 18:17:52 CET 2017
From: Jean-François Têtu <jean-francois.tetu@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 29 Sep 2017 16:19:44 -0400
Subject: ASoC: codecs: msm8916-wcd-analog: fix micbias level
From: Jean-François Têtu <jean-francois.tetu@xxxxxxxxxxxxxxxxxxxx>
[ Upstream commit 664611e7e02f76fbc5470ef545b2657ed25c292b ]
The macro used to set the microphone bias level causes the
snd_soc_write() call to overwrite other fields in the CDC_A_MICB_1_VAL
register. The macro also does not return the proper level value
to use. This fixes this by preserving all bits from the register
that are not the level while setting the level.
Signed-off-by: Jean-François Têtu <jean-francois.tetu@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/msm8916-wcd-analog.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -104,7 +104,7 @@
#define CDC_A_MICB_1_VAL (0xf141)
#define MICB_MIN_VAL 1600
#define MICB_STEP_SIZE 50
-#define MICB_VOLTAGE_REGVAL(v) ((v - MICB_MIN_VAL)/MICB_STEP_SIZE)
+#define MICB_VOLTAGE_REGVAL(v) (((v - MICB_MIN_VAL)/MICB_STEP_SIZE) << 3)
#define MICB_1_VAL_MICB_OUT_VAL_MASK GENMASK(7, 3)
#define MICB_1_VAL_MICB_OUT_VAL_V2P70V ((0x16) << 3)
#define MICB_1_VAL_MICB_OUT_VAL_V1P80V ((0x4) << 3)
@@ -349,8 +349,9 @@ static void pm8916_wcd_analog_micbias_en
| MICB_1_CTL_EXT_PRECHARG_EN_ENABLE);
if (wcd->micbias_mv) {
- snd_soc_write(codec, CDC_A_MICB_1_VAL,
- MICB_VOLTAGE_REGVAL(wcd->micbias_mv));
+ snd_soc_update_bits(codec, CDC_A_MICB_1_VAL,
+ MICB_1_VAL_MICB_OUT_VAL_MASK,
+ MICB_VOLTAGE_REGVAL(wcd->micbias_mv));
/*
* Special headset needs MICBIAS as 2.7V so wait for
* 50 msec for the MICBIAS to reach 2.7 volts.
Patches currently in stable-queue which might be from jean-francois.tetu@xxxxxxxxxxxxxxxxxxxx are
queue-4.14/asoc-codecs-msm8916-wcd-analog-fix-micbias-level.patch