From: Martin Povišer <povik+lin@xxxxxxxxxxx>
The codec has an option to zero out certain TDM slots on its SDOUT
output according to a preconfigured mask (otherwise the output is, for
the duration of unused slots, in a Hi-Z state).
Since the programmed value is dependent on how the chip is implemented
on a given board, configure this feature based on a mask read from the
specific codec's Devicetree node.
Reviewed-by: Neal Gompa <neal@xxxxxxxxx>
Signed-off-by: Martin Povišer <povik+lin@xxxxxxxxxxx>
Signed-off-by: James Calligeros <jcalligeros99@xxxxxxxxx>
---
sound/soc/codecs/tas2764.c | 23 +++++++++++++++++++++++
sound/soc/codecs/tas2764.h | 11 +++++++++++
2 files changed, 34 insertions(+)
diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
index 49b73b74b2d9dd6d09747cabc2b00519c549775d..f33ac89ffc598c39f3a7e0d620724098ca5bc3d3 100644
--- a/sound/soc/codecs/tas2764.c
+++ b/sound/soc/codecs/tas2764.c
@@ -40,6 +40,7 @@ struct tas2764_priv {
int v_sense_slot;
int i_sense_slot;
+ u32 sdout_zero_mask;
bool dac_powered;
bool unmuted;
@@ -601,6 +602,23 @@ static int tas2764_codec_probe(struct snd_soc_component *component)
if (ret < 0)
return ret;
+ if (tas2764->sdout_zero_mask) {
+ for (i = 0; i < 4; i++) {
+ ret = snd_soc_component_write(component, TAS2764_SDOUT_HIZ_1 + i,
+ (tas2764->sdout_zero_mask >> (i * 8)) & 0xff);
+
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = snd_soc_component_update_bits(component, TAS2764_SDOUT_HIZ_9,
+ TAS2764_SDOUT_HIZ_9_FORCE_0_EN,
+ TAS2764_SDOUT_HIZ_9_FORCE_0_EN);
+
+ if (ret < 0)
+ return ret;
+ }
+
switch (tas2764->devid) {
case DEVID_SN012776:
ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
@@ -749,6 +767,11 @@ static int tas2764_parse_dt(struct device *dev, struct tas2764_priv *tas2764)
if (ret)
tas2764->v_sense_slot = 2;
+ ret = fwnode_property_read_u32(dev->fwnode, "ti,sdout-force-zero-mask",
+ &tas2764->sdout_zero_mask);
+ if (ret)
+ tas2764->sdout_zero_mask = 0;
+
return 0;
}
diff --git a/sound/soc/codecs/tas2764.h b/sound/soc/codecs/tas2764.h
index 3251dc0106e07862dd69efd69fa0e40c3858ecb7..4cf0f7f112d6c3002203fa32e900efd640ef3f22 100644
--- a/sound/soc/codecs/tas2764.h
+++ b/sound/soc/codecs/tas2764.h
@@ -123,4 +123,15 @@
#define TAS2764_BOP_CFG0 TAS2764_REG(0X0, 0x1d)
+#define TAS2764_SDOUT_HIZ_1 TAS2764_REG(0x1, 0x3d)
+#define TAS2764_SDOUT_HIZ_2 TAS2764_REG(0x1, 0x3e)
+#define TAS2764_SDOUT_HIZ_3 TAS2764_REG(0x1, 0x3f)
+#define TAS2764_SDOUT_HIZ_4 TAS2764_REG(0x1, 0x40)
+#define TAS2764_SDOUT_HIZ_5 TAS2764_REG(0x1, 0x41)
+#define TAS2764_SDOUT_HIZ_6 TAS2764_REG(0x1, 0x42)
+#define TAS2764_SDOUT_HIZ_7 TAS2764_REG(0x1, 0x43)
+#define TAS2764_SDOUT_HIZ_8 TAS2764_REG(0x1, 0x44)
+#define TAS2764_SDOUT_HIZ_9 TAS2764_REG(0x1, 0x45)
+#define TAS2764_SDOUT_HIZ_9_FORCE_0_EN BIT(7)
+
#endif /* __TAS2764__ */
--
2.48.1
