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%3Ba=su...

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@vger.kernel.org know about it.

From a8992973edbb2555e956b90f6fe97c4bc14d761d Mon Sep 17 00:00:00 2001

From: Fabio Estevam fabio.estevam@nxp.com Date: Fri, 16 Feb 2018 11:58:54 -0200 Subject: ASoC: sgtl5000: Fix suspend/resume

From: Fabio Estevam fabio.estevam@nxp.com

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@kernel.org Signed-off-by: Fabio Estevam fabio.estevam@nxp.com Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- 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@nxp.com are

queue-4.15/asoc-sgtl5000-fix-suspend-resume.patch