[alsa-devel] Applied "ASoC: rt5651: Do not modify the LDO voltage control bits from set_bias_level()" to the asoc tree

[Mark Brown]

The patch

   ASoC: rt5651: Do not modify the LDO voltage control bits from set_bias_level()

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From bba4e685dae8643469ca6fac22f10ca81554586e Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede at redhat.com>
Date: Sun, 25 Feb 2018 11:46:50 +0100
Subject: [PATCH] ASoC: rt5651: Do not modify the LDO voltage control bits from
 set_bias_level()

The PWR_ANLG1 reg not only contains various power on/off bits, it also
contains 2 bits which select if the LDO generates 1.0, 1.1 or 1.2V. Note
there is a separate on/off bit for the LDO.

rt5651_set_bias_level(BIAS_OFF) used to unconditionally clear the entire
register, when jack-detection support was introduced a special case for
jack-detect was added which hard-codes a register value to keep the LDO
voltage at 1.2 volt.

This commit removes the jack-detect special case, instead simply always
leaving the LDO voltage control bits as is on BIAS_OFF.

Tested-by: Carlo Caione <carlo at endlessm.com>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/rt5651.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/rt5651.c b/sound/soc/codecs/rt5651.c
index c565607f95f7..c93539ee2200 100644
--- a/sound/soc/codecs/rt5651.c
+++ b/sound/soc/codecs/rt5651.c
@@ -1555,11 +1555,12 @@ static int rt5651_set_bias_level(struct snd_soc_component *component,
 		snd_soc_component_write(component, RT5651_PWR_DIG2, 0x0000);
 		snd_soc_component_write(component, RT5651_PWR_VOL, 0x0000);
 		snd_soc_component_write(component, RT5651_PWR_MIXER, 0x0000);
+		/* Do not touch the LDO voltage select bits on bias-off */
+		snd_soc_component_update_bits(component, RT5651_PWR_ANLG1,
+			~RT5651_PWR_LDO_DVO_MASK, 0);
 		if (rt5651->jd_src) {
 			snd_soc_component_write(component, RT5651_PWR_ANLG2, 0x0204);
-			snd_soc_component_write(component, RT5651_PWR_ANLG1, 0x0002);
 		} else {
-			snd_soc_component_write(component, RT5651_PWR_ANLG1, 0x0000);
 			snd_soc_component_write(component, RT5651_PWR_ANLG2, 0x0000);
 		}
 		break;
-- 
2.16.2