Re: [PATCH v3 1/7] ASoC: tegra: add a TDM configuration callback

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On 01/10/2019 14:40, Jon Hunter wrote:

On 30/09/2019 17:51, Ben Dooks wrote:
From: Edward Cragg <edward.cragg@xxxxxxxxxxxxxxx>

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

Signed-off-by: Edward Cragg <edward.cragg@xxxxxxxxxxxxxxx>
[ben.dooks@xxxxxxxxxxxxxxx: merge fix for power management]
[ben.dooks@xxxxxxxxxxxxxxx: add review change for fsync of 1 clock]
Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
---
  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..7f9ef6abeae2 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);
+	// set the fsync width to minimum of 1 clock width

Please make sure you are consistent with your commenting style and you
adhere to the kernel coding style.

Also, I see a lot of ...

ERROR: trailing whitespace
#197: FILE: sound/soc/tegra/tegra30_i2s.c:258:
+ * Set up TDM^M$

ERROR: DOS line endings
#198: FILE: sound/soc/tegra/tegra30_i2s.c:259:
+ */^M$

I'll go and check that later.
I did assume my colleagues had done the relevant checks themselves...


--
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

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