[PATCH v3 1/9] ASoC: sun4i-i2s: Adjust regmap settings

From: codekipper
Date: Fri Dec 21 2018 - 10:21:20 EST


From: Marcus Cooper <codekipper@xxxxxxxxx>

Bypass the regmap cache when flushing the i2s FIFOs and modify the tables
to reflect this.

Signed-off-by: Marcus Cooper <codekipper@xxxxxxxxx>
---
sound/soc/sunxi/sun4i-i2s.c | 29 +++++++++--------------------
1 file changed, 9 insertions(+), 20 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index d5ec1a20499d..64d073cb2aee 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -548,9 +548,11 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
{
/* Flush RX FIFO */
+ regcache_cache_bypass(i2s->regmap, true);
regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
+ regcache_cache_bypass(i2s->regmap, false);

/* Clear RX counter */
regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
@@ -569,9 +571,11 @@ static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
{
/* Flush TX FIFO */
+ regcache_cache_bypass(i2s->regmap, true);
regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
+ regcache_cache_bypass(i2s->regmap, false);

/* Clear TX counter */
regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
@@ -703,13 +707,7 @@ static const struct snd_soc_component_driver sun4i_i2s_component = {

static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
{
- switch (reg) {
- case SUN4I_I2S_FIFO_TX_REG:
- return false;
-
- default:
- return true;
- }
+ return true;
}

static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
@@ -728,6 +726,8 @@ static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SUN4I_I2S_FIFO_RX_REG:
+ case SUN4I_I2S_FIFO_TX_REG:
+ case SUN4I_I2S_FIFO_STA_REG:
case SUN4I_I2S_INT_STA_REG:
case SUN4I_I2S_RX_CNT_REG:
case SUN4I_I2S_TX_CNT_REG:
@@ -738,23 +738,12 @@ static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
}
}

-static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
-{
- switch (reg) {
- case SUN8I_I2S_FIFO_TX_REG:
- return false;
-
- default:
- return true;
- }
-}
-
static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
{
if (reg == SUN8I_I2S_INT_STA_REG)
return true;
if (reg == SUN8I_I2S_FIFO_TX_REG)
- return false;
+ return true;

return sun4i_i2s_volatile_reg(dev, reg);
}
@@ -809,7 +798,7 @@ static const struct regmap_config sun8i_i2s_regmap_config = {
.reg_defaults = sun8i_i2s_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(sun8i_i2s_reg_defaults),
.writeable_reg = sun4i_i2s_wr_reg,
- .readable_reg = sun8i_i2s_rd_reg,
+ .readable_reg = sun4i_i2s_rd_reg,
.volatile_reg = sun8i_i2s_volatile_reg,
};

--
2.20.1