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From:   Lucas Tanure <tanureal@opensource.cirrus.com>
To:     James Schulman <james.schulman@cirrus.com>,
        David Rhodes <david.rhodes@cirrus.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>
CC:     <alsa-devel@alsa-project.org>, <linux-kernel@vger.kernel.org>,
        <patches@opensource.cirrus.com>,
        Lucas Tanure <tanureal@opensource.cirrus.com>
Subject: [PATCH v3 12/15] ASoC: cs42l42: Use bclk from hw_params if set_sysclk was not called
Date:   Sat, 6 Mar 2021 18:55:50 +0000
Message-ID: <20210306185553.62053-13-tanureal@opensource.cirrus.com>
In-Reply-To: <20210306185553.62053-1-tanureal@opensource.cirrus.com>
References: <20210306185553.62053-1-tanureal@opensource.cirrus.com>
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Precedence: bulk

Add support for reading the source clock from snd_soc_params_to_bclk
so the machine driver is not required to call cs42l42_set_sysclk

Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
---
Changes in v3:
- No changes

Changes in v2:
- No changes

 sound/soc/codecs/cs42l42.c | 17 +++++++++++++----
 sound/soc/codecs/cs42l42.h |  1 +
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 594bf22521037..68b7ed71ad542 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -588,10 +588,16 @@ static int cs42l42_pll_config(struct snd_soc_component *component)
 {
 	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(component);
 	int i;
+	u32 clk;
 	u32 fsync;
 
+	if (!cs42l42->sclk)
+		clk = cs42l42->bclk;
+	else
+		clk = cs42l42->sclk;
+
 	for (i = 0; i < ARRAY_SIZE(pll_ratio_table); i++) {
-		if (pll_ratio_table[i].sclk == cs42l42->sclk) {
+		if (pll_ratio_table[i].sclk == clk) {
 			/* Configure the internal sample rate */
 			snd_soc_component_update_bits(component, CS42L42_MCLK_CTL,
 					CS42L42_INTERNAL_FS_MASK,
@@ -611,12 +617,12 @@ static int cs42l42_pll_config(struct snd_soc_component *component)
 					(pll_ratio_table[i].mclk_div <<
 					CS42L42_MCLKDIV_SHIFT));
 			/* Set up the LRCLK */
-			fsync = cs42l42->sclk / cs42l42->srate;
-			if (((fsync * cs42l42->srate) != cs42l42->sclk)
+			fsync = clk / cs42l42->srate;
+			if (((fsync * cs42l42->srate) != clk)
 				|| ((fsync % 2) != 0)) {
 				dev_err(component->dev,
 					"Unsupported sclk %d/sample rate %d\n",
-					cs42l42->sclk,
+					clk,
 					cs42l42->srate);
 				return -EINVAL;
 			}
@@ -788,6 +794,7 @@ static int cs42l42_pcm_hw_params(struct snd_pcm_substream *substream,
 	unsigned int val = 0;
 
 	cs42l42->srate = params_rate(params);
+	cs42l42->bclk = snd_soc_params_to_bclk(params);
 
 	switch(substream->stream) {
 	case SNDRV_PCM_STREAM_CAPTURE:
@@ -921,6 +928,8 @@ static struct snd_soc_dai_driver cs42l42_dai = {
 			.rates = SNDRV_PCM_RATE_8000_192000,
 			.formats = CS42L42_FORMATS,
 		},
+		.symmetric_rate = 1,
+		.symmetric_sample_bits = 1,
 		.ops = &cs42l42_ops,
 };
 
diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index e12828877a20d..429c6833fc811 100644
--- a/sound/soc/codecs/cs42l42.h
+++ b/sound/soc/codecs/cs42l42.h
@@ -771,6 +771,7 @@ struct  cs42l42_private {
 	struct gpio_desc *reset_gpio;
 	struct completion pdn_done;
 	struct snd_soc_jack jack;
+	int bclk;
 	u32 sclk;
 	u32 srate;
 	u8 plug_state;
-- 
2.30.1