[PATCH 5.15 118/244] ASoC: tas2770: Set correct FSYNC polarity

Greg Kroah-Hartman
2022-08-23T10:13:49Z

From: Martin Povišer <povik+lin@cutebit.org>

commit e9ac31f0a5d0e246b046c20348954519f91a297f upstream.

Fix setting of FSYNC polarity for DAI formats other than I2S. Also
add support for polarity inversion.

Fixes: 1a476abc723e ("tas2770: add tas2770 smart PA kernel driver")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220808141246.5749-2-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/soc/codecs/tas2770.c | 20 +++++++++++++++++++-
sound/soc/codecs/tas2770.h | 3 +++
2 files changed, 22 insertions(+), 1 deletion(-)

--- a/sound/soc/codecs/tas2770.c
+++ b/sound/soc/codecs/tas2770.c
@@ -337,7 +337,7 @@ static int tas2770_set_fmt(struct snd_so
struct snd_soc_component *component = dai->component;
struct tas2770_priv *tas2770 =
snd_soc_component_get_drvdata(component);
- u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
+ u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0;
int ret;

switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
@@ -349,9 +349,15 @@ static int tas2770_set_fmt(struct snd_so
}

switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_IF:
+ invert_fpol = 1;
+ fallthrough;
case SND_SOC_DAIFMT_NB_NF:
asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
break;
+ case SND_SOC_DAIFMT_IB_IF:
+ invert_fpol = 1;
+ fallthrough;
case SND_SOC_DAIFMT_IB_NF:
asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
break;
@@ -369,15 +375,19 @@ static int tas2770_set_fmt(struct snd_so
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
tdm_rx_start_slot = 1;
+ fpol_preinv = 0;
break;
case SND_SOC_DAIFMT_DSP_A:
tdm_rx_start_slot = 0;
+ fpol_preinv = 1;
break;
case SND_SOC_DAIFMT_DSP_B:
tdm_rx_start_slot = 1;
+ fpol_preinv = 1;
break;
case SND_SOC_DAIFMT_LEFT_J:
tdm_rx_start_slot = 0;
+ fpol_preinv = 1;
break;
default:
dev_err(tas2770->dev,
@@ -391,6 +401,14 @@ static int tas2770_set_fmt(struct snd_so
if (ret < 0)
return ret;

+ ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
+ TAS2770_TDM_CFG_REG0_FPOL_MASK,
+ (fpol_preinv ^ invert_fpol)
+ ? TAS2770_TDM_CFG_REG0_FPOL_RSING
+ : TAS2770_TDM_CFG_REG0_FPOL_FALING);
+ if (ret < 0)
+ return ret;
+
return 0;
}

--- a/sound/soc/codecs/tas2770.h
+++ b/sound/soc/codecs/tas2770.h
@@ -41,6 +41,9 @@
#define TAS2770_TDM_CFG_REG0_31_44_1_48KHZ 0x6
#define TAS2770_TDM_CFG_REG0_31_88_2_96KHZ 0x8
#define TAS2770_TDM_CFG_REG0_31_176_4_192KHZ 0xa
+#define TAS2770_TDM_CFG_REG0_FPOL_MASK BIT(0)
+#define TAS2770_TDM_CFG_REG0_FPOL_RSING 0
+#define TAS2770_TDM_CFG_REG0_FPOL_FALING 1
/* TDM Configuration Reg1 */
#define TAS2770_TDM_CFG_REG1 TAS2770_REG(0X0, 0x0B)
#define TAS2770_TDM_CFG_REG1_MASK GENMASK(5, 1)