This is a note to let you know that I've just added the patch titled
ALSA: hda/tas2781: do not use regcache
to the 6.6-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:
alsa-hda-tas2781-do-not-use-regcache.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6dad45f4d28977bd1948973107cf325d431e5b7e Mon Sep 17 00:00:00 2001
From: Gergo Koteles <soyer@xxxxxx>
Date: Fri, 22 Dec 2023 00:48:56 +0100
Subject: ALSA: hda/tas2781: do not use regcache
From: Gergo Koteles <soyer@xxxxxx>
commit 6dad45f4d28977bd1948973107cf325d431e5b7e upstream.
There are two problems with using regcache in this module.
The amplifier has 3 addressing levels (BOOK, PAGE, REG). The firmware
contains blocks that must be written to BOOK 0x8C. The regcache doesn't
know anything about BOOK, so regcache_sync writes invalid values to the
actual BOOK.
The module handles 2 or more separate amplifiers. The amplifiers have
different register values, and the module uses only one regmap/regcache
for all the amplifiers. The regcache_sync only writes the last amplifier
used.
The module successfully restores all the written register values (RC
profile, program, configuration, calibration) without regcache.
Remove regcache functions and set regmap cache_type to REGCACHE_NONE.
Link: https://lore.kernel.org/r/21a183b5a08cb23b193af78d4b1114cc59419272.1701906455.git.soyer@xxxxxx/
Fixes: 5be27f1e3ec9 ("ALSA: hda/tas2781: Add tas2781 HDA driver")
Acked-by: Mark Brown <broonie@xxxxxxxxxx>
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Gergo Koteles <soyer@xxxxxx>
Link: https://lore.kernel.org/r/491aeed0e2eecc3b704ec856f815db21bad3ba0e.1703202126.git.soyer@xxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/tas2781_hda_i2c.c | 17 +----------------
sound/soc/codecs/tas2781-comlib.c | 2 +-
2 files changed, 2 insertions(+), 17 deletions(-)
--- a/sound/pci/hda/tas2781_hda_i2c.c
+++ b/sound/pci/hda/tas2781_hda_i2c.c
@@ -717,8 +717,6 @@ static int tas2781_runtime_suspend(struc
tas_priv->tasdevice[i].cur_conf = -1;
}
- regcache_cache_only(tas_priv->regmap, true);
- regcache_mark_dirty(tas_priv->regmap);
mutex_unlock(&tas_priv->codec_lock);
@@ -730,20 +728,11 @@ static int tas2781_runtime_resume(struct
struct tasdevice_priv *tas_priv = dev_get_drvdata(dev);
unsigned long calib_data_sz =
tas_priv->ndev * TASDEVICE_SPEAKER_CALIBRATION_SIZE;
- int ret;
dev_dbg(tas_priv->dev, "Runtime Resume\n");
mutex_lock(&tas_priv->codec_lock);
- regcache_cache_only(tas_priv->regmap, false);
- ret = regcache_sync(tas_priv->regmap);
- if (ret) {
- dev_err(tas_priv->dev,
- "Failed to restore register cache: %d\n", ret);
- goto out;
- }
-
tasdevice_prmg_load(tas_priv, tas_priv->cur_prog);
/* If calibrated data occurs error, dsp will still works with default
@@ -752,10 +741,9 @@ static int tas2781_runtime_resume(struct
if (tas_priv->cali_data.total_sz > calib_data_sz)
tas2781_apply_calib(tas_priv);
-out:
mutex_unlock(&tas_priv->codec_lock);
- return ret;
+ return 0;
}
static int tas2781_system_suspend(struct device *dev)
@@ -770,10 +758,7 @@ static int tas2781_system_suspend(struct
return ret;
/* Shutdown chip before system suspend */
- regcache_cache_only(tas_priv->regmap, false);
tasdevice_tuning_switch(tas_priv, 1);
- regcache_cache_only(tas_priv->regmap, true);
- regcache_mark_dirty(tas_priv->regmap);
/*
* Reset GPIO may be shared, so cannot reset here.
--- a/sound/soc/codecs/tas2781-comlib.c
+++ b/sound/soc/codecs/tas2781-comlib.c
@@ -39,7 +39,7 @@ static const struct regmap_range_cfg tas
static const struct regmap_config tasdevice_regmap = {
.reg_bits = 8,
.val_bits = 8,
- .cache_type = REGCACHE_RBTREE,
+ .cache_type = REGCACHE_NONE,
.ranges = tasdevice_ranges,
.num_ranges = ARRAY_SIZE(tasdevice_ranges),
.max_register = 256 * 128,
Patches currently in stable-queue which might be from soyer@xxxxxx are
queue-6.6/alsa-hda-tas2781-remove-sound-controls-in-unbind.patch
queue-6.6/alsa-hda-tas2781-do-not-use-regcache.patch
queue-6.6/alsa-hda-tas2781-move-set_drv_data-outside-tasdevice_init.patch
