[PATCH v2 10/29] ASoC: tas2764: Configure zeroing of SDOUT slots
From: James Calligeros <hidden>
Date: 2025-02-18 08:37:13
Also in:
asahi, linux-hwmon, linux-sound, lkml
Subsystem:
sound, sound - soc layer / dynamic audio power management (asoc), texas instruments audio (asoc/hda) drivers, the rest · Maintainers:
Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Shenghao Ding, Kevin Lu, Baojun Xu, Sen Wang, Linus Torvalds
From: Martin Povišer <povik+lin@cutebit.org> 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). Configure this feature based on a mask read from the devicetree. Reviewed-by: Neal Gompa <neal@gompa.dev> Signed-off-by: Martin Povišer <povik+lin@cutebit.org> Signed-off-by: James Calligeros <redacted> --- 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 e4003a724c8c09303882ee36fc11133cf5c78b57..a2b7d0352d4f636c2bf7185715c0f1143ba8150e 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;
@@ -594,6 +595,23 @@ 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; + } + if (tas2764->devid == DEVID_SN012776) { ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL, TAS2764_PWR_CTRL_BOP_SRC,
@@ -736,6 +754,11 @@ 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 b814715b41ff6e9a714c30ae204e7792351428b6..00296b8b1f7584e7520bd6ed749a09681f16ea09 100644
--- a/sound/soc/codecs/tas2764.h
+++ b/sound/soc/codecs/tas2764.h@@ -117,4 +117,15 @@ #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__ */
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2.48.1