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ALSA: hda/tas2781: do not use regcache

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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@irl.hu/

Fixes: 5be27f1e3e ("ALSA: hda/tas2781: Add tas2781 HDA driver")
Acked-by: Mark Brown <broonie@kernel.org>
CC: stable@vger.kernel.org
Signed-off-by: Gergo Koteles <soyer@irl.hu>
Link: https://lore.kernel.org/r/491aeed0e2eecc3b704ec856f815db21bad3ba0e.1703202126.git.soyer@irl.hu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Gergo Koteles 2023-12-22 00:48:56 +01:00 committed by Takashi Iwai
parent 916d051730
commit 6dad45f4d2
2 changed files with 2 additions and 17 deletions
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17
sound/pci/hda/tas2781_hda_i2c.c
View File

@ -717,8 +717,6 @@ static int tas2781_runtime_suspend(struct device *dev)
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 device *dev)
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 device *dev)
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 device *dev)
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.

2
sound/soc/codecs/tas2781-comlib.c
View File

@ -39,7 +39,7 @@ static const struct regmap_range_cfg tasdevice_ranges[] = {
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,