This is a note to let you know that I've just added the patch titled
ASoC: sgtl5000: Fix suspend/resume
to the 4.15-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-sgtl5000-fix-suspend-resume.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a8992973edbb2555e956b90f6fe97c4bc14d761d Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@xxxxxxx>
Date: Fri, 16 Feb 2018 11:58:54 -0200
Subject: ASoC: sgtl5000: Fix suspend/resume
From: Fabio Estevam <fabio.estevam@xxxxxxx>
commit a8992973edbb2555e956b90f6fe97c4bc14d761d upstream.
Commit 8419caa72702 ("ASoC: sgtl5000: Do not disable regulators in
SND_SOC_BIAS_OFF") causes the sgtl5000 to fail after a suspend/resume
sequence:
Playing WAVE '/media/a2002011001-e02.wav' : Signed 16 bit Little
Endian, Rate 44100 Hz, Stereo
aplay: pcm_write:2051: write error: Input/output error
The problem is caused by the fact that the aforementioned commit
dropped the cache handling, so re-introduce the register map
resync to fix the problem.
Suggested-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/sgtl5000.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -871,15 +871,26 @@ static int sgtl5000_pcm_hw_params(struct
static int sgtl5000_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
+ struct sgtl5000_priv *sgtl = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
case SND_SOC_BIAS_STANDBY:
+ regcache_cache_only(sgtl->regmap, false);
+ ret = regcache_sync(sgtl->regmap);
+ if (ret) {
+ regcache_cache_only(sgtl->regmap, true);
+ return ret;
+ }
+
snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
SGTL5000_REFTOP_POWERUP,
SGTL5000_REFTOP_POWERUP);
break;
case SND_SOC_BIAS_OFF:
+ regcache_cache_only(sgtl->regmap, true);
snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
SGTL5000_REFTOP_POWERUP, 0);
break;
Patches currently in stable-queue which might be from fabio.estevam@xxxxxxx are
queue-4.15/asoc-sgtl5000-fix-suspend-resume.patch