linux-kernel - [PATCH 13/27] ASoC: tas2764: Crop SDOUT zero-out mask based on BCLK ratio

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Message-Id: <20250215-apple-codec-changes-v1-13-723569b21b19@gmail.com>
Date: Sat, 15 Feb 2025 10:02:46 +1000
From: James Calligeros <jcalligeros99@...il.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>, 
 Baojun Xu <baojun.xu@...com>, Dan Murphy <dmurphy@...com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shi Fu <shifu0704@...ndersoft.com>
Cc: Alyssa Rosenzweig <alyssa@...enzweig.io>, 
 Martin Povišer <povik+lin@...ebit.org>, 
 Hector Martin <marcan@...can.st>, linux-sound@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 asahi@...ts.linux.dev, James Calligeros <jcalligeros99@...il.com>
Subject: [PATCH 13/27] ASoC: tas2764: Crop SDOUT zero-out mask based on
 BCLK ratio

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

Signed-off-by: Martin Povišer <povik+lin@...ebit.org>
Signed-off-by: James Calligeros <jcalligeros99@...il.com>
---
 sound/soc/codecs/tas2764.c | 56 +++++++++++++++++--------
 1 file changed, 39 insertions(+), 17 deletions(-)

diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
index 25238d3721a21d5af8434490acfdb7ba53de9ce0..439e5bbd372cd467966ac9cac1c92e3e300fed54 100644
--- a/sound/soc/codecs/tas2764.c
+++ b/sound/soc/codecs/tas2764.c
@@ -375,6 +375,44 @@ static int tas2764_hw_params(struct snd_pcm_substream *substream,
 	return tas2764_set_samplerate(tas2764, params_rate(params));
 }
 
+static int tas2764_write_sdout_zero_mask(struct tas2764_priv *tas2764, int bclk_ratio)
+{
+	struct snd_soc_component *component = tas2764->component;
+	int nsense_slots = bclk_ratio / 8;
+	u32 cropped_mask;
+	int i, ret;
+
+	if (!tas2764->sdout_zero_mask)
+		return 0;
+
+	cropped_mask = tas2764->sdout_zero_mask & GENMASK(nsense_slots - 1, 0);
+
+	for (i = 0; i < 4; i++) {
+		ret = snd_soc_component_write(component, TAS2764_SDOUT_HIZ_1 + i,
+					      (cropped_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;
+
+	return 0;
+}
+
+static int tas2764_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
+{
+	struct snd_soc_component *component = dai->component;
+	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+
+	return tas2764_write_sdout_zero_mask(tas2764, ratio);
+}
+
 static int tas2764_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 {
 	struct snd_soc_component *component = dai->component;
@@ -506,6 +544,7 @@ static int tas2764_set_dai_tdm_slot(struct snd_soc_dai *dai,
 static const struct snd_soc_dai_ops tas2764_dai_ops = {
 	.mute_stream = tas2764_mute,
 	.hw_params  = tas2764_hw_params,
+	.set_bclk_ratio = tas2764_set_bclk_ratio,
 	.set_fmt    = tas2764_set_fmt,
 	.set_tdm_slot = tas2764_set_dai_tdm_slot,
 	.no_capture_mute = 1,
@@ -658,23 +697,6 @@ 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,

-- 
2.48.1