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ASoC: rt1308-sdw: get calibration params after power on
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It will be safe when getting the calibration params after power-on.
All powers are ready to read the calibration params from EFUSE.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220315093740.12008-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Shuming Fan authored and Mark Brown committed Mar 16, 2022
1 parent 9ebd62d commit abed17f
Showing 1 changed file with 40 additions and 33 deletions.
73 changes: 40 additions & 33 deletions sound/soc/codecs/rt1308-sdw.c
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,8 @@ static bool rt1308_volatile_register(struct device *dev, unsigned int reg)
case 0x3008:
case 0x300a:
case 0xc000:
case 0xc860 ... 0xc863:
case 0xc870 ... 0xc873:
return true;
default:
return false;
Expand Down Expand Up @@ -159,12 +161,45 @@ static int rt1308_read_prop(struct sdw_slave *slave)
return 0;
}

static void rt1308_apply_calib_params(struct rt1308_sdw_priv *rt1308)
{
unsigned int efuse_m_btl_l, efuse_m_btl_r, tmp;
unsigned int efuse_c_btl_l, efuse_c_btl_r;

/* read efuse to apply calibration parameters */
regmap_write(rt1308->regmap, 0xc7f0, 0x04);
regmap_write(rt1308->regmap, 0xc7f1, 0xfe);
msleep(100);
regmap_write(rt1308->regmap, 0xc7f0, 0x44);
msleep(20);
regmap_write(rt1308->regmap, 0xc240, 0x10);

regmap_read(rt1308->regmap, 0xc861, &tmp);
efuse_m_btl_l = tmp;
regmap_read(rt1308->regmap, 0xc860, &tmp);
efuse_m_btl_l = efuse_m_btl_l | (tmp << 8);
regmap_read(rt1308->regmap, 0xc863, &tmp);
efuse_c_btl_l = tmp;
regmap_read(rt1308->regmap, 0xc862, &tmp);
efuse_c_btl_l = efuse_c_btl_l | (tmp << 8);
regmap_read(rt1308->regmap, 0xc871, &tmp);
efuse_m_btl_r = tmp;
regmap_read(rt1308->regmap, 0xc870, &tmp);
efuse_m_btl_r = efuse_m_btl_r | (tmp << 8);
regmap_read(rt1308->regmap, 0xc873, &tmp);
efuse_c_btl_r = tmp;
regmap_read(rt1308->regmap, 0xc872, &tmp);
efuse_c_btl_r = efuse_c_btl_r | (tmp << 8);
dev_dbg(&rt1308->sdw_slave->dev, "%s m_btl_l=0x%x, m_btl_r=0x%x\n", __func__,
efuse_m_btl_l, efuse_m_btl_r);
dev_dbg(&rt1308->sdw_slave->dev, "%s c_btl_l=0x%x, c_btl_r=0x%x\n", __func__,
efuse_c_btl_l, efuse_c_btl_r);
}

static int rt1308_io_init(struct device *dev, struct sdw_slave *slave)
{
struct rt1308_sdw_priv *rt1308 = dev_get_drvdata(dev);
int ret = 0;
unsigned int efuse_m_btl_l, efuse_m_btl_r, tmp;
unsigned int efuse_c_btl_l, efuse_c_btl_r;

if (rt1308->hw_init)
return 0;
Expand Down Expand Up @@ -196,37 +231,6 @@ static int rt1308_io_init(struct device *dev, struct sdw_slave *slave)
/* sw reset */
regmap_write(rt1308->regmap, RT1308_SDW_RESET, 0);

/* read efuse */
regmap_write(rt1308->regmap, 0xc360, 0x01);
regmap_write(rt1308->regmap, 0xc361, 0x80);
regmap_write(rt1308->regmap, 0xc7f0, 0x04);
regmap_write(rt1308->regmap, 0xc7f1, 0xfe);
msleep(100);
regmap_write(rt1308->regmap, 0xc7f0, 0x44);
msleep(20);
regmap_write(rt1308->regmap, 0xc240, 0x10);

regmap_read(rt1308->regmap, 0xc861, &tmp);
efuse_m_btl_l = tmp;
regmap_read(rt1308->regmap, 0xc860, &tmp);
efuse_m_btl_l = efuse_m_btl_l | (tmp << 8);
regmap_read(rt1308->regmap, 0xc863, &tmp);
efuse_c_btl_l = tmp;
regmap_read(rt1308->regmap, 0xc862, &tmp);
efuse_c_btl_l = efuse_c_btl_l | (tmp << 8);
regmap_read(rt1308->regmap, 0xc871, &tmp);
efuse_m_btl_r = tmp;
regmap_read(rt1308->regmap, 0xc870, &tmp);
efuse_m_btl_r = efuse_m_btl_r | (tmp << 8);
regmap_read(rt1308->regmap, 0xc873, &tmp);
efuse_c_btl_r = tmp;
regmap_read(rt1308->regmap, 0xc872, &tmp);
efuse_c_btl_r = efuse_c_btl_r | (tmp << 8);
dev_dbg(&slave->dev, "%s m_btl_l=0x%x, m_btl_r=0x%x\n", __func__,
efuse_m_btl_l, efuse_m_btl_r);
dev_dbg(&slave->dev, "%s c_btl_l=0x%x, c_btl_r=0x%x\n", __func__,
efuse_c_btl_l, efuse_c_btl_r);

/* initial settings */
regmap_write(rt1308->regmap, 0xc103, 0xc0);
regmap_write(rt1308->regmap, 0xc030, 0x17);
Expand Down Expand Up @@ -323,6 +327,8 @@ static int rt1308_classd_event(struct snd_soc_dapm_widget *w,
{
struct snd_soc_component *component =
snd_soc_dapm_to_component(w->dapm);
struct rt1308_sdw_priv *rt1308 =
snd_soc_component_get_drvdata(component);

switch (event) {
case SND_SOC_DAPM_POST_PMU:
Expand All @@ -331,6 +337,7 @@ static int rt1308_classd_event(struct snd_soc_dapm_widget *w,
RT1308_SDW_OFFSET | (RT1308_POWER_STATUS << 4),
0x3, 0x3);
msleep(40);
rt1308_apply_calib_params(rt1308);
break;
case SND_SOC_DAPM_PRE_PMD:
snd_soc_component_update_bits(component,
Expand Down

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