[v2,1/7] ASoC: tegra: Add a TDM configuration callback
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Message ID 20190923162026.14882-2-ben.dooks@codethink.co.uk
State New
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Series
  • [v2,1/7] ASoC: tegra: Add a TDM configuration callback
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Commit Message

Ben Dooks (Codethink) Sept. 23, 2019, 4:20 p.m. UTC
From: Edward Cragg <edward.cragg@codethink.co.uk>

Add a callback to configure TDM settings for the Tegra30 I2S ASoC 'platform'
driver.

Signed-off-by: Edward Cragg <edward.cragg@codethink.co.uk>
[ben.dooks@codethink.co.uk: merge fix for power management]
[ben.dooks@codethink.co.uk: add review change for fsync of 1 clock]
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 sound/soc/tegra/tegra30_i2s.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

Comments

Jon Hunter Sept. 24, 2019, 9:22 a.m. UTC | #1
On 23/09/2019 17:20, Ben Dooks wrote:
> From: Edward Cragg <edward.cragg@codethink.co.uk>
> 
> Add a callback to configure TDM settings for the Tegra30 I2S ASoC 'platform'
> driver.
> 
> Signed-off-by: Edward Cragg <edward.cragg@codethink.co.uk>
> [ben.dooks@codethink.co.uk: merge fix for power management]
> [ben.dooks@codethink.co.uk: add review change for fsync of 1 clock]
> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
> ---
>  sound/soc/tegra/tegra30_i2s.c | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
> 
> diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
> index ac6983c6bd72..dfed60adbeba 100644
> --- a/sound/soc/tegra/tegra30_i2s.c
> +++ b/sound/soc/tegra/tegra30_i2s.c
> @@ -254,6 +254,38 @@ static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
>  	return 0;
>  }
>  
> +/*
> + * Set up TDM
> + */
> +static int tegra30_i2s_set_tdm(struct snd_soc_dai *dai,
> +			       unsigned int tx_mask, unsigned int rx_mask,
> +			       int slots, int slot_width)
> +{
> +	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
> +	unsigned int mask, val;
> +
> +	dev_dbg(dai->dev, "%s: txmask=0x%08x rxmask=0x%08x slots=%d width=%d\n",
> +		 __func__, tx_mask, rx_mask, slots, slot_width);
> +
> +	/* Set up slots and tx/rx masks */
> +	mask = TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_MASK |
> +	       TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_MASK |
> +	       TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_MASK;
> +
> +	val = (tx_mask << TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_SHIFT) |
> +	      (rx_mask << TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_SHIFT) |
> +	      ((slots - 1) << TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_SHIFT);
> +
> +	pm_runtime_get_sync(dai->dev);
> +	regmap_update_bits(i2s->regmap, TEGRA30_I2S_SLOT_CTRL, mask, val);
> +	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL,
> +		TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_MASK,
> +		(1 - 1) << TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_SHIFT);

So this is just 0, so it would be simpler just to write 0. Feel free to
add a comment.

Cheers
Jon
Ben Dooks (Codethink) Sept. 24, 2019, 9:26 a.m. UTC | #2
>> +	pm_runtime_get_sync(dai->dev);
>> +	regmap_update_bits(i2s->regmap, TEGRA30_I2S_SLOT_CTRL, mask, val);
>> +	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL,
>> +		TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_MASK,
>> +		(1 - 1) << TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_SHIFT);
> 
> So this is just 0, so it would be simpler just to write 0. Feel free to
> add a comment.
> 
> Cheers
> Jon

Ok, will consider setting this to "0". Thanks.

Patch
diff mbox series

diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index ac6983c6bd72..dfed60adbeba 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -254,6 +254,38 @@  static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 	return 0;
 }
 
+/*
+ * Set up TDM
+ */
+static int tegra30_i2s_set_tdm(struct snd_soc_dai *dai,
+			       unsigned int tx_mask, unsigned int rx_mask,
+			       int slots, int slot_width)
+{
+	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+	unsigned int mask, val;
+
+	dev_dbg(dai->dev, "%s: txmask=0x%08x rxmask=0x%08x slots=%d width=%d\n",
+		 __func__, tx_mask, rx_mask, slots, slot_width);
+
+	/* Set up slots and tx/rx masks */
+	mask = TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_MASK |
+	       TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_MASK |
+	       TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_MASK;
+
+	val = (tx_mask << TEGRA30_I2S_SLOT_CTRL_TX_SLOT_ENABLES_SHIFT) |
+	      (rx_mask << TEGRA30_I2S_SLOT_CTRL_RX_SLOT_ENABLES_SHIFT) |
+	      ((slots - 1) << TEGRA30_I2S_SLOT_CTRL_TOTAL_SLOTS_SHIFT);
+
+	pm_runtime_get_sync(dai->dev);
+	regmap_update_bits(i2s->regmap, TEGRA30_I2S_SLOT_CTRL, mask, val);
+	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL,
+		TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_MASK,
+		(1 - 1) << TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_SHIFT);
+	pm_runtime_put(dai->dev);
+
+	return 0;
+}
+
 static int tegra30_i2s_probe(struct snd_soc_dai *dai)
 {
 	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
@@ -268,6 +300,7 @@  static const struct snd_soc_dai_ops tegra30_i2s_dai_ops = {
 	.set_fmt	= tegra30_i2s_set_fmt,
 	.hw_params	= tegra30_i2s_hw_params,
 	.trigger	= tegra30_i2s_trigger,
+	.set_tdm_slot	= tegra30_i2s_set_tdm,
 };
 
 static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {