[alsa-devel] tegra30 tdm audio support

[alsa-devel] tegra30 tdm audio support

[Ben Dooks]

This adds support for tegra30 tdm audio and fixes a bug in the fifo
handling on rx when non-32 bit aligned data is used.

v2:
- moved edge-control and data-offset to the set_fmt callbacks
- fixed dev_dbg in set_tdm callback
- fixed dev_dbg message contents in set_tdm callback
- changed fsync width to be permanently 1 clock

v3:
- cleanup fsync patch
- fix rebase issue with tdm patch


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[alsa-devel] [PATCH v3 1/7] ASoC: tegra: add a TDM configuration callback

[Ben Dooks]

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..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
+	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL,
+			   TEGRA30_I2S_CH_CTRL_FSYNC_WIDTH_MASK, 0x0);
+	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 = {
-- 
2.23.0

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[alsa-devel] [PATCH v3 2/7] ASoC: tegra: Allow 24bit and 32bit samples

[Ben Dooks]

From: Edward Cragg <edward.cragg@codethink.co.uk>

The tegra3 audio can support 24 and 32 bit sample sizes so add the
option to the tegra30_i2s_hw_params to configure the S24_LE or S32_LE
formats when requested.

Signed-off-by: Edward Cragg <edward.cragg@codethink.co.uk>
[ben.dooks@codethink.co.uk: fixup merge of 24 and 32bit]
[ben.dooks@codethink.co.uk: add pm calls around ytdm config]
[ben.dooks@codethink.co.uk: drop debug printing to dev_dbg]
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
squash 5aeca5a055fd ASoC: tegra: i2s: pm_runtime_get_sync() is needed in tdm code

ASoC: tegra: i2s: pm_runtime_get_sync() is needed in tdm code
---
 sound/soc/tegra/tegra30_i2s.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index 7f9ef6abeae2..b948b010c057 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -127,7 +127,7 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 	struct device *dev = dai->dev;
 	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 	unsigned int mask, val, reg;
-	int ret, sample_size, srate, i2sclock, bitcnt;
+	int ret, sample_size, srate, i2sclock, bitcnt, audio_bits;
 	struct tegra30_ahub_cif_conf cif_conf;
 
 	if (params_channels(params) != 2)
@@ -137,8 +137,19 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_S16_LE:
 		val = TEGRA30_I2S_CTRL_BIT_SIZE_16;
+		audio_bits = TEGRA30_AUDIOCIF_BITS_16;
 		sample_size = 16;
 		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		val = TEGRA30_I2S_CTRL_BIT_SIZE_24;
+		audio_bits = TEGRA30_AUDIOCIF_BITS_24;
+		sample_size = 24;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		val = TEGRA30_I2S_CTRL_BIT_SIZE_32;
+		audio_bits = TEGRA30_AUDIOCIF_BITS_32;
+		sample_size = 32;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -170,8 +181,8 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 	cif_conf.threshold = 0;
 	cif_conf.audio_channels = 2;
 	cif_conf.client_channels = 2;
-	cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
-	cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
+	cif_conf.audio_bits = audio_bits;
+	cif_conf.client_bits = audio_bits;
 	cif_conf.expand = 0;
 	cif_conf.stereo_conv = 0;
 	cif_conf.replicate = 0;
@@ -310,14 +321,18 @@ static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_96000,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		.formats = SNDRV_PCM_FMTBIT_S32_LE |
+			   SNDRV_PCM_FMTBIT_S24_LE |
+			   SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000_96000,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		.formats = SNDRV_PCM_FMTBIT_S32_LE |
+			   SNDRV_PCM_FMTBIT_S24_LE |
+			   SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.ops = &tegra30_i2s_dai_ops,
 	.symmetric_rates = 1,
-- 
2.23.0

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[alsa-devel] [PATCH v3 3/7] ASoC: tegra: i2s: Add support for more than 2 channels

[Ben Dooks]

From: Edward Cragg <edward.cragg@codethink.co.uk>

The CIF configuration and clock setting is currently hard coded for 2
channels. Since the hardware is capable of supporting 1-8 channels add
support for reading the channel count from the supplied parameters to
allow for better TDM support. It seems the original implementation of this
driver was fixed at 2 channels for simplicity, and not implementing TDM.

Signed-off-by: Edward Cragg <edward.cragg@codethink.co.uk>
[ben.dooks@codethink.co.uk: added is_tdm and channel nr check]
[ben.dooks@codethink.co.uk: merge edge control into set-format]
[ben.dooks@codethink.co.uk: removed is_tdm and moved edge to hw_params]
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 sound/soc/tegra/tegra30_i2s.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index b948b010c057..0fee59171d3b 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -67,6 +67,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
 {
 	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 	unsigned int mask = 0, val = 0;
+	unsigned int ch_mask, ch_val = 0;
 
 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 	case SND_SOC_DAIFMT_NB_NF:
@@ -75,6 +76,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
 		return -EINVAL;
 	}
 
+	ch_mask = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_MASK;
 	mask |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 	case SND_SOC_DAIFMT_CBS_CFS:
@@ -90,10 +92,12 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
 		TEGRA30_I2S_CTRL_LRCK_MASK;
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_DSP_A:
+		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
 		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
 		val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
 		break;
 	case SND_SOC_DAIFMT_DSP_B:
+		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
 		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
 		val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
 		break;
@@ -115,6 +119,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
 
 	pm_runtime_get_sync(dai->dev);
 	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
+	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL, ch_mask, ch_val);
 	pm_runtime_put(dai->dev);
 
 	return 0;
@@ -127,10 +132,11 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 	struct device *dev = dai->dev;
 	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
 	unsigned int mask, val, reg;
-	int ret, sample_size, srate, i2sclock, bitcnt, audio_bits;
+	int ret, sample_size, srate, i2sclock, bitcnt, audio_bits, channels;
 	struct tegra30_ahub_cif_conf cif_conf;
 
-	if (params_channels(params) != 2)
+	channels = params_channels(params);
+	if (channels > 8)
 		return -EINVAL;
 
 	mask = TEGRA30_I2S_CTRL_BIT_SIZE_MASK;
@@ -157,9 +163,8 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
 
 	srate = params_rate(params);
-
 	/* Final "* 2" required by Tegra hardware */
-	i2sclock = srate * params_channels(params) * sample_size * 2;
+	i2sclock = srate * channels * sample_size * 2;
 
 	bitcnt = (i2sclock / (2 * srate)) - 1;
 	if (bitcnt < 0 || bitcnt > TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US)
@@ -179,8 +184,8 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 	regmap_write(i2s->regmap, TEGRA30_I2S_TIMING, val);
 
 	cif_conf.threshold = 0;
-	cif_conf.audio_channels = 2;
-	cif_conf.client_channels = 2;
+	cif_conf.audio_channels = channels;
+	cif_conf.client_channels = channels;
 	cif_conf.audio_bits = audio_bits;
 	cif_conf.client_bits = audio_bits;
 	cif_conf.expand = 0;
@@ -319,7 +324,7 @@ static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 2,
-		.channels_max = 2,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_8000_96000,
 		.formats = SNDRV_PCM_FMTBIT_S32_LE |
 			   SNDRV_PCM_FMTBIT_S24_LE |
@@ -328,7 +333,7 @@ static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 2,
-		.channels_max = 2,
+		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_8000_96000,
 		.formats = SNDRV_PCM_FMTBIT_S32_LE |
 			   SNDRV_PCM_FMTBIT_S24_LE |
-- 
2.23.0

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[alsa-devel] [PATCH v3 4/7] ASoC: tegra: disable rx_fifo after disable stream

[Ben Dooks]

We see odd FIFO overruns with this, we assume the best thing to do is
to disable the RX I2S frontend first, and then disable the FIFO that
is using it.

This also fixes an issue where using multi-word frames (TDM) have
partial samples stuck in the FIFO which then get read out when the
next capture is started.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 sound/soc/tegra/tegra30_i2s.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index 0fee59171d3b..c573151da341 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -236,9 +236,9 @@ static void tegra30_i2s_start_capture(struct tegra30_i2s *i2s)
 
 static void tegra30_i2s_stop_capture(struct tegra30_i2s *i2s)
 {
-	tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
 	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
 			   TEGRA30_I2S_CTRL_XFER_EN_RX, 0);
+	tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
 }
 
 static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
-- 
2.23.0

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[alsa-devel] [PATCH v3 5/7] ASoC: tegra: set i2s_offset to 0 for tdm

[Ben Dooks]

Set the offset to 0 for TDM mode, as per the current setup. Note we also
move the data offset programming to the i2s hw_parameters call as per
the suggestion from Jon Hunter.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
v2:
 - fix the review comments and move the i2s offset setting
---
 sound/soc/tegra/tegra30_i2s.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index c573151da341..a03692b0afc3 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -66,7 +66,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
 				unsigned int fmt)
 {
 	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
-	unsigned int mask = 0, val = 0;
+	unsigned int mask = 0, val = 0, data_offset = 1;
 	unsigned int ch_mask, ch_val = 0;
 
 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
@@ -95,11 +95,13 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
 		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
 		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
 		val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
+		data_offset = 0;
 		break;
 	case SND_SOC_DAIFMT_DSP_B:
 		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
 		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
 		val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
+		data_offset = 0;
 		break;
 	case SND_SOC_DAIFMT_I2S:
 		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
@@ -120,6 +122,10 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
 	pm_runtime_get_sync(dai->dev);
 	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
 	regmap_update_bits(i2s->regmap, TEGRA30_I2S_CH_CTRL, ch_mask, ch_val);
+	val = (data_offset << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
+		(data_offset << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
+	regmap_write(i2s->regmap, TEGRA30_I2S_OFFSET, val);
+
 	pm_runtime_put(dai->dev);
 
 	return 0;
@@ -203,11 +209,6 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 	}
 
 	i2s->soc_data->set_audio_cif(i2s->regmap, reg, &cif_conf);
-
-	val = (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
-	      (1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
-	regmap_write(i2s->regmap, TEGRA30_I2S_OFFSET, val);
-
 	return 0;
 }
 
-- 
2.23.0

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[alsa-devel] [PATCH v3 6/7] ASoC: tegra: config fifos on hw_param changes

[Ben Dooks]

If the hw_params uses a different bit or channel count, then we
need to change both the I2S unit's CIF configuration as well as
the APBIF one.

To allow changing the APBIF, add a call to reconfigure the RX or
TX FIFO without changing the DMA or allocation, and get the I2S
driver to call it once the hw params have been calculate.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 sound/soc/tegra/tegra30_ahub.c | 114 ++++++++++++++++++---------------
 sound/soc/tegra/tegra30_ahub.h |   5 ++
 sound/soc/tegra/tegra30_i2s.c  |   2 +
 3 files changed, 69 insertions(+), 52 deletions(-)

diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
index 952381260dc3..58e05ceb86da 100644
--- a/sound/soc/tegra/tegra30_ahub.c
+++ b/sound/soc/tegra/tegra30_ahub.c
@@ -84,12 +84,40 @@ static int tegra30_ahub_runtime_resume(struct device *dev)
 	return 0;
 }
 
+int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif rxcif,
+			       struct tegra30_ahub_cif_conf *cif_conf)
+{
+	int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
+	u32 reg, val;
+
+	pm_runtime_get_sync(ahub->dev);
+
+	reg = TEGRA30_AHUB_CHANNEL_CTRL +
+	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
+	val = tegra30_apbif_read(reg);
+	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
+		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
+	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
+	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
+	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
+	tegra30_apbif_write(reg, val);
+
+	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
+
+	reg = TEGRA30_AHUB_CIF_RX_CTRL +
+	      (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
+	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
+
+	pm_runtime_put(ahub->dev);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(tegra30_ahub_setup_rx_fifo);
+
 int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
 				  char *dmachan, int dmachan_len,
 				  dma_addr_t *fiforeg)
 {
 	int channel;
-	u32 reg, val;
 	struct tegra30_ahub_cif_conf cif_conf;
 
 	channel = find_first_zero_bit(ahub->rx_usage,
@@ -104,37 +132,14 @@ int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
 	*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO +
 		   (channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
 
-	pm_runtime_get_sync(ahub->dev);
+	memset(&cif_conf, 0, sizeof(cif_conf));
 
-	reg = TEGRA30_AHUB_CHANNEL_CTRL +
-	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
-	val = tegra30_apbif_read(reg);
-	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
-		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
-	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
-	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
-	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
-	tegra30_apbif_write(reg, val);
-
-	cif_conf.threshold = 0;
 	cif_conf.audio_channels = 2;
 	cif_conf.client_channels = 2;
 	cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
 	cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
-	cif_conf.expand = 0;
-	cif_conf.stereo_conv = 0;
-	cif_conf.replicate = 0;
-	cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
-	cif_conf.truncate = 0;
-	cif_conf.mono_conv = 0;
-
-	reg = TEGRA30_AHUB_CIF_RX_CTRL +
-	      (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
-	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
-
-	pm_runtime_put(ahub->dev);
 
-	return 0;
+	return tegra30_ahub_setup_rx_fifo(*rxcif, &cif_conf);
 }
 EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_rx_fifo);
 
@@ -186,12 +191,40 @@ int tegra30_ahub_free_rx_fifo(enum tegra30_ahub_rxcif rxcif)
 }
 EXPORT_SYMBOL_GPL(tegra30_ahub_free_rx_fifo);
 
+int tegra30_ahub_setup_tx_fifo(enum tegra30_ahub_txcif txcif,
+			       struct tegra30_ahub_cif_conf *cif_conf)
+{
+	int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
+	u32 reg, val;
+
+	pm_runtime_get_sync(ahub->dev);
+
+	reg = TEGRA30_AHUB_CHANNEL_CTRL +
+	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
+	val = tegra30_apbif_read(reg);
+	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
+		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
+	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
+	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
+	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
+	tegra30_apbif_write(reg, val);
+
+	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
+
+	reg = TEGRA30_AHUB_CIF_TX_CTRL +
+	      (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
+	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
+
+	pm_runtime_put(ahub->dev);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(tegra30_ahub_setup_tx_fifo);
+
 int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
 				  char *dmachan, int dmachan_len,
 				  dma_addr_t *fiforeg)
 {
 	int channel;
-	u32 reg, val;
 	struct tegra30_ahub_cif_conf cif_conf;
 
 	channel = find_first_zero_bit(ahub->tx_usage,
@@ -206,37 +239,14 @@ int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
 	*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_TXFIFO +
 		   (channel * TEGRA30_AHUB_CHANNEL_TXFIFO_STRIDE);
 
-	pm_runtime_get_sync(ahub->dev);
-
-	reg = TEGRA30_AHUB_CHANNEL_CTRL +
-	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
-	val = tegra30_apbif_read(reg);
-	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
-		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
-	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
-	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
-	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
-	tegra30_apbif_write(reg, val);
-
-	cif_conf.threshold = 0;
+	memset(&cif_conf, 0, sizeof(cif_conf));
 	cif_conf.audio_channels = 2;
 	cif_conf.client_channels = 2;
 	cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
 	cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
-	cif_conf.expand = 0;
-	cif_conf.stereo_conv = 0;
-	cif_conf.replicate = 0;
 	cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
-	cif_conf.truncate = 0;
-	cif_conf.mono_conv = 0;
-
-	reg = TEGRA30_AHUB_CIF_TX_CTRL +
-	      (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
-	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
 
-	pm_runtime_put(ahub->dev);
-
-	return 0;
+	return tegra30_ahub_setup_tx_fifo(*txcif, &cif_conf);
 }
 EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_tx_fifo);
 
diff --git a/sound/soc/tegra/tegra30_ahub.h b/sound/soc/tegra/tegra30_ahub.h
index 6889c5f23d02..26120aee64b3 100644
--- a/sound/soc/tegra/tegra30_ahub.h
+++ b/sound/soc/tegra/tegra30_ahub.h
@@ -490,6 +490,11 @@ void tegra30_ahub_set_cif(struct regmap *regmap, unsigned int reg,
 void tegra124_ahub_set_cif(struct regmap *regmap, unsigned int reg,
 			   struct tegra30_ahub_cif_conf *conf);
 
+extern int tegra30_ahub_setup_tx_fifo(enum tegra30_ahub_txcif txcif,
+				      struct tegra30_ahub_cif_conf *cif_conf);
+extern int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif,
+				      struct tegra30_ahub_cif_conf *cif_conf);
+
 struct tegra30_ahub_soc_data {
 	u32 mod_list_mask;
 	void (*set_audio_cif)(struct regmap *regmap,
diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index a03692b0afc3..19ac49df6cc8 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -202,9 +202,11 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
+		tegra30_ahub_setup_tx_fifo(i2s->playback_fifo_cif, &cif_conf);
 		reg = TEGRA30_I2S_CIF_RX_CTRL;
 	} else {
 		cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
+		tegra30_ahub_setup_rx_fifo(i2s->capture_fifo_cif, &cif_conf);
 		reg = TEGRA30_I2S_CIF_TX_CTRL;
 	}
 
-- 
2.23.0

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[alsa-devel] [PATCH v3 7/7] ASoC: tegra: take packing settings from the audio cif_config

[Ben Dooks]

If the CIF is not configured as 16 or 8 bit, then the
packing for 8/16 bits should not be enabled as the
hardware only supports 8 or 16 bit packing.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 sound/soc/tegra/tegra30_ahub.c | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
index 58e05ceb86da..c2f2e29dd32e 100644
--- a/sound/soc/tegra/tegra30_ahub.c
+++ b/sound/soc/tegra/tegra30_ahub.c
@@ -96,10 +96,17 @@ int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif rxcif,
 	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 	val = tegra30_apbif_read(reg);
 	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
-		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
-	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
-	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
-	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
+		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK |
+		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN);
+	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT);
+	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_16 ||
+	    cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_8)
+		val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN;
+	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_16)
+		val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
+	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_8)
+		val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_8_4;
+
 	tegra30_apbif_write(reg, val);
 
 	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
@@ -203,10 +210,16 @@ int tegra30_ahub_setup_tx_fifo(enum tegra30_ahub_txcif txcif,
 	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 	val = tegra30_apbif_read(reg);
 	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
-		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
-	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
-	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
-	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
+		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK |
+		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN);
+	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT);
+	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_16 ||
+	    cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_8)
+		val |= TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN;
+	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_16)
+		val |= TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
+	if (cif_conf->audio_bits == TEGRA30_AUDIOCIF_BITS_8)
+		val |= TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_8_4;
 	tegra30_apbif_write(reg, val);
 
 	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
-- 
2.23.0

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

[Jon Hunter]

On 30/09/2019 17:51, 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..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);

I am not sure why this keeps changing. Why not set to 1 always?

Jon

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Re: [alsa-devel] [PATCH v3 5/7] ASoC: tegra: set i2s_offset to 0 for tdm

[Jon Hunter]

On 30/09/2019 17:51, Ben Dooks wrote:
> Set the offset to 0 for TDM mode, as per the current setup. Note we also
> move the data offset programming to the i2s hw_parameters call as per
> the suggestion from Jon Hunter.
> 
> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
> ---
> v2:
>  - fix the review comments and move the i2s offset setting
> ---
>  sound/soc/tegra/tegra30_i2s.c | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
> index c573151da341..a03692b0afc3 100644
> --- a/sound/soc/tegra/tegra30_i2s.c
> +++ b/sound/soc/tegra/tegra30_i2s.c
> @@ -66,7 +66,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
>  				unsigned int fmt)
>  {
>  	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
> -	unsigned int mask = 0, val = 0;
> +	unsigned int mask = 0, val = 0, data_offset = 1;
>  	unsigned int ch_mask, ch_val = 0;
>  
>  	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
> @@ -95,11 +95,13 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
>  		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
>  		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
>  		val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
> +		data_offset = 0;
>  		break;
>  	case SND_SOC_DAIFMT_DSP_B:
>  		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
>  		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
>  		val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
> +		data_offset = 0;

My understanding is that the difference between dsp-a and dsp-b is that
dsp-a has an offset of 1 and dsp-b has an offset of 0.

Cheers
Jon

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Re: [alsa-devel] [PATCH v3 6/7] ASoC: tegra: config fifos on hw_param changes

[Jon Hunter]

On 30/09/2019 17:51, Ben Dooks wrote:
> If the hw_params uses a different bit or channel count, then we
> need to change both the I2S unit's CIF configuration as well as
> the APBIF one.
> 
> To allow changing the APBIF, add a call to reconfigure the RX or
> TX FIFO without changing the DMA or allocation, and get the I2S
> driver to call it once the hw params have been calculate.
> 
> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
> ---
>  sound/soc/tegra/tegra30_ahub.c | 114 ++++++++++++++++++---------------
>  sound/soc/tegra/tegra30_ahub.h |   5 ++
>  sound/soc/tegra/tegra30_i2s.c  |   2 +
>  3 files changed, 69 insertions(+), 52 deletions(-)
> 
> diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
> index 952381260dc3..58e05ceb86da 100644
> --- a/sound/soc/tegra/tegra30_ahub.c
> +++ b/sound/soc/tegra/tegra30_ahub.c
> @@ -84,12 +84,40 @@ static int tegra30_ahub_runtime_resume(struct device *dev)
>  	return 0;
>  }
>  
> +int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif rxcif,
> +			       struct tegra30_ahub_cif_conf *cif_conf)
> +{
> +	int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
> +	u32 reg, val;
> +
> +	pm_runtime_get_sync(ahub->dev);
> +
> +	reg = TEGRA30_AHUB_CHANNEL_CTRL +
> +	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
> +	val = tegra30_apbif_read(reg);
> +	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
> +		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
> +	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
> +	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
> +	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
> +	tegra30_apbif_write(reg, val);
> +
> +	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
> +
> +	reg = TEGRA30_AHUB_CIF_RX_CTRL +
> +	      (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
> +	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
> +
> +	pm_runtime_put(ahub->dev);
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(tegra30_ahub_setup_rx_fifo);
> +
>  int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
>  				  char *dmachan, int dmachan_len,
>  				  dma_addr_t *fiforeg)
>  {
>  	int channel;
> -	u32 reg, val;
>  	struct tegra30_ahub_cif_conf cif_conf;
>  
>  	channel = find_first_zero_bit(ahub->rx_usage,
> @@ -104,37 +132,14 @@ int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
>  	*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO +
>  		   (channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
>  
> -	pm_runtime_get_sync(ahub->dev);
> +	memset(&cif_conf, 0, sizeof(cif_conf));
>  
> -	reg = TEGRA30_AHUB_CHANNEL_CTRL +
> -	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
> -	val = tegra30_apbif_read(reg);
> -	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
> -		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
> -	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
> -	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
> -	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
> -	tegra30_apbif_write(reg, val);
> -
> -	cif_conf.threshold = 0;
>  	cif_conf.audio_channels = 2;
>  	cif_conf.client_channels = 2;
>  	cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>  	cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
> -	cif_conf.expand = 0;
> -	cif_conf.stereo_conv = 0;
> -	cif_conf.replicate = 0;
> -	cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
> -	cif_conf.truncate = 0;
> -	cif_conf.mono_conv = 0;
> -
> -	reg = TEGRA30_AHUB_CIF_RX_CTRL +
> -	      (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
> -	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
> -
> -	pm_runtime_put(ahub->dev);
>  
> -	return 0;
> +	return tegra30_ahub_setup_rx_fifo(*rxcif, &cif_conf);

It seems a bit odd, that you still configure some of the cif_conf
members and then call tegra30_ahub_setup_rx_fifo() here. Why not just
allocate it and then move all the programming to
tegra30_ahub_setup_rx_fifo()?

>  }
>  EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_rx_fifo);
>  
> @@ -186,12 +191,40 @@ int tegra30_ahub_free_rx_fifo(enum tegra30_ahub_rxcif rxcif)
>  }
>  EXPORT_SYMBOL_GPL(tegra30_ahub_free_rx_fifo);
>  
> +int tegra30_ahub_setup_tx_fifo(enum tegra30_ahub_txcif txcif,
> +			       struct tegra30_ahub_cif_conf *cif_conf)
> +{
> +	int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
> +	u32 reg, val;
> +
> +	pm_runtime_get_sync(ahub->dev);
> +
> +	reg = TEGRA30_AHUB_CHANNEL_CTRL +
> +	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
> +	val = tegra30_apbif_read(reg);
> +	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
> +		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
> +	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
> +	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
> +	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
> +	tegra30_apbif_write(reg, val);
> +
> +	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
> +
> +	reg = TEGRA30_AHUB_CIF_TX_CTRL +
> +	      (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
> +	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
> +
> +	pm_runtime_put(ahub->dev);
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(tegra30_ahub_setup_tx_fifo);
> +
>  int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
>  				  char *dmachan, int dmachan_len,
>  				  dma_addr_t *fiforeg)
>  {
>  	int channel;
> -	u32 reg, val;
>  	struct tegra30_ahub_cif_conf cif_conf;
>  
>  	channel = find_first_zero_bit(ahub->tx_usage,
> @@ -206,37 +239,14 @@ int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
>  	*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_TXFIFO +
>  		   (channel * TEGRA30_AHUB_CHANNEL_TXFIFO_STRIDE);
>  
> -	pm_runtime_get_sync(ahub->dev);
> -
> -	reg = TEGRA30_AHUB_CHANNEL_CTRL +
> -	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
> -	val = tegra30_apbif_read(reg);
> -	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
> -		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
> -	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
> -	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
> -	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
> -	tegra30_apbif_write(reg, val);
> -
> -	cif_conf.threshold = 0;
> +	memset(&cif_conf, 0, sizeof(cif_conf));
>  	cif_conf.audio_channels = 2;
>  	cif_conf.client_channels = 2;
>  	cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>  	cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
> -	cif_conf.expand = 0;
> -	cif_conf.stereo_conv = 0;
> -	cif_conf.replicate = 0;
>  	cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
> -	cif_conf.truncate = 0;
> -	cif_conf.mono_conv = 0;
> -
> -	reg = TEGRA30_AHUB_CIF_TX_CTRL +
> -	      (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
> -	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
>  
> -	pm_runtime_put(ahub->dev);
> -
> -	return 0;
> +	return tegra30_ahub_setup_tx_fifo(*txcif, &cif_conf);
>  }
>  EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_tx_fifo);
>  
> diff --git a/sound/soc/tegra/tegra30_ahub.h b/sound/soc/tegra/tegra30_ahub.h
> index 6889c5f23d02..26120aee64b3 100644
> --- a/sound/soc/tegra/tegra30_ahub.h
> +++ b/sound/soc/tegra/tegra30_ahub.h
> @@ -490,6 +490,11 @@ void tegra30_ahub_set_cif(struct regmap *regmap, unsigned int reg,
>  void tegra124_ahub_set_cif(struct regmap *regmap, unsigned int reg,
>  			   struct tegra30_ahub_cif_conf *conf);
>  
> +extern int tegra30_ahub_setup_tx_fifo(enum tegra30_ahub_txcif txcif,
> +				      struct tegra30_ahub_cif_conf *cif_conf);
> +extern int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif,
> +				      struct tegra30_ahub_cif_conf *cif_conf);
> +
>  struct tegra30_ahub_soc_data {
>  	u32 mod_list_mask;
>  	void (*set_audio_cif)(struct regmap *regmap,
> diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
> index a03692b0afc3..19ac49df6cc8 100644
> --- a/sound/soc/tegra/tegra30_i2s.c
> +++ b/sound/soc/tegra/tegra30_i2s.c
> @@ -202,9 +202,11 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
>  
>  	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
>  		cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;

You set the direction here and then set it again in
tegra30_ahub_setup_tx_fifo(). It only needs to be done once.

> +		tegra30_ahub_setup_tx_fifo(i2s->playback_fifo_cif, &cif_conf);
>  		reg = TEGRA30_I2S_CIF_RX_CTRL;
>  	} else {
>  		cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
> +		tegra30_ahub_setup_rx_fifo(i2s->capture_fifo_cif, &cif_conf);
>  		reg = TEGRA30_I2S_CIF_TX_CTRL;
>  	}
>  
> 

Cheers
Jon

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

[Ben Dooks]

On 30/09/2019 21:46, Jon Hunter wrote:
> 
> On 30/09/2019 17:51, 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..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);
> 
> I am not sure why this keeps changing. Why not set to 1 always?

This is the total number of slots, not the width of the fsync
which has been changed to 1 below this.

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Re: [alsa-devel] [PATCH v3 5/7] ASoC: tegra: set i2s_offset to 0 for tdm

[Ben Dooks]

On 30/09/2019 21:52, Jon Hunter wrote:
> 
> 
> On 30/09/2019 17:51, Ben Dooks wrote:
>> Set the offset to 0 for TDM mode, as per the current setup. Note we also
>> move the data offset programming to the i2s hw_parameters call as per
>> the suggestion from Jon Hunter.
>>
>> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
>> ---
>> v2:
>>   - fix the review comments and move the i2s offset setting
>> ---
>>   sound/soc/tegra/tegra30_i2s.c | 13 +++++++------
>>   1 file changed, 7 insertions(+), 6 deletions(-)
>>
>> diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
>> index c573151da341..a03692b0afc3 100644
>> --- a/sound/soc/tegra/tegra30_i2s.c
>> +++ b/sound/soc/tegra/tegra30_i2s.c
>> @@ -66,7 +66,7 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
>>   				unsigned int fmt)
>>   {
>>   	struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
>> -	unsigned int mask = 0, val = 0;
>> +	unsigned int mask = 0, val = 0, data_offset = 1;
>>   	unsigned int ch_mask, ch_val = 0;
>>   
>>   	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
>> @@ -95,11 +95,13 @@ static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
>>   		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
>>   		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
>>   		val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
>> +		data_offset = 0;
>>   		break;
>>   	case SND_SOC_DAIFMT_DSP_B:
>>   		ch_val = TEGRA30_I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE;
>>   		val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
>>   		val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
>> +		data_offset = 0;
> 
> My understanding is that the difference between dsp-a and dsp-b is that
> dsp-a has an offset of 1 and dsp-b has an offset of 0.

Ok, can anyone else check this before I make the change for DSP_B ?


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Re: [alsa-devel] [PATCH v3 5/7] ASoC: tegra: set i2s_offset to 0 for tdm

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 198 bytes --]

On Mon, Sep 30, 2019 at 09:52:15PM +0100, Jon Hunter wrote:

> My understanding is that the difference between dsp-a and dsp-b is that
> dsp-a has an offset of 1 and dsp-b has an offset of 0.

Yes.

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[-- Type: application/pgp-signature, Size: 488 bytes --]

[-- Attachment #2: Type: text/plain, Size: 161 bytes --]

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

[Jon Hunter]

On 01/10/2019 12:00, Ben Dooks wrote:
> On 30/09/2019 21:46, Jon Hunter wrote:
>>
>> On 30/09/2019 17:51, 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..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);
>>
>> I am not sure why this keeps changing. Why not set to 1 always?
> 
> This is the total number of slots, not the width of the fsync
> which has been changed to 1 below this.

Ah yes indeed. Sorry, should have waited until this morning to look at
this! Jon

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

[Jon Hunter]

On 30/09/2019 17:51, 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..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$

Jon

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

[Ben Dooks]

On 01/10/2019 14:40, Jon Hunter wrote:
> 
> On 30/09/2019 17:51, 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..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...


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

[Ben Dooks]

On 01/10/2019 14:40, Jon Hunter wrote:
> 
> On 30/09/2019 17:51, 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..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$

ok, for me I am getting:

> $ ./scripts/checkpatch.pl ./patches/0001-ASoC-tegra-add-a-TDM-configuration-callback.patch 
> WARNING: Possible unwrapped commit description (prefer a maximum 75 chars per line)
> #6: 
> Add a callback to configure TDM settings for the Tegra30 I2S ASoC 'platform'
> 
> total: 0 errors, 1 warnings, 45 lines checked
> 
> NOTE: For some of the reported defects, checkpatch may be able to
>       mechanically convert to the typical style using --fix or --fix-inplace.

I don't see any warnings about the line-endings

I will remove the comment about the function, it is fairly self explanatory.



-- 
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Re: [alsa-devel] [PATCH v3 6/7] ASoC: tegra: config fifos on hw_param changes

[Ben Dooks]

On 30/09/2019 22:08, Jon Hunter wrote:
> 
> On 30/09/2019 17:51, Ben Dooks wrote:
>> If the hw_params uses a different bit or channel count, then we
>> need to change both the I2S unit's CIF configuration as well as
>> the APBIF one.
>>
>> To allow changing the APBIF, add a call to reconfigure the RX or
>> TX FIFO without changing the DMA or allocation, and get the I2S
>> driver to call it once the hw params have been calculate.
>>
>> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
>> ---
>>   sound/soc/tegra/tegra30_ahub.c | 114 ++++++++++++++++++---------------
>>   sound/soc/tegra/tegra30_ahub.h |   5 ++
>>   sound/soc/tegra/tegra30_i2s.c  |   2 +
>>   3 files changed, 69 insertions(+), 52 deletions(-)
>>
>> diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
>> index 952381260dc3..58e05ceb86da 100644
>> --- a/sound/soc/tegra/tegra30_ahub.c
>> +++ b/sound/soc/tegra/tegra30_ahub.c
>> @@ -84,12 +84,40 @@ static int tegra30_ahub_runtime_resume(struct device *dev)
>>   	return 0;
>>   }
>>   
>> +int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif rxcif,
>> +			       struct tegra30_ahub_cif_conf *cif_conf)
>> +{
>> +	int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
>> +	u32 reg, val;
>> +
>> +	pm_runtime_get_sync(ahub->dev);
>> +
>> +	reg = TEGRA30_AHUB_CHANNEL_CTRL +
>> +	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
>> +	val = tegra30_apbif_read(reg);
>> +	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
>> +		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
>> +	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
>> +	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
>> +	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
>> +	tegra30_apbif_write(reg, val);
>> +
>> +	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
>> +
>> +	reg = TEGRA30_AHUB_CIF_RX_CTRL +
>> +	      (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
>> +	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
>> +
>> +	pm_runtime_put(ahub->dev);
>> +	return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(tegra30_ahub_setup_rx_fifo);
>> +
>>   int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
>>   				  char *dmachan, int dmachan_len,
>>   				  dma_addr_t *fiforeg)
>>   {
>>   	int channel;
>> -	u32 reg, val;
>>   	struct tegra30_ahub_cif_conf cif_conf;
>>   
>>   	channel = find_first_zero_bit(ahub->rx_usage,
>> @@ -104,37 +132,14 @@ int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
>>   	*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO +
>>   		   (channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
>>   
>> -	pm_runtime_get_sync(ahub->dev);
>> +	memset(&cif_conf, 0, sizeof(cif_conf));
>>   
>> -	reg = TEGRA30_AHUB_CHANNEL_CTRL +
>> -	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
>> -	val = tegra30_apbif_read(reg);
>> -	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
>> -		 TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
>> -	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
>> -	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
>> -	       TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
>> -	tegra30_apbif_write(reg, val);
>> -
>> -	cif_conf.threshold = 0;
>>   	cif_conf.audio_channels = 2;
>>   	cif_conf.client_channels = 2;
>>   	cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>>   	cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
>> -	cif_conf.expand = 0;
>> -	cif_conf.stereo_conv = 0;
>> -	cif_conf.replicate = 0;
>> -	cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
>> -	cif_conf.truncate = 0;
>> -	cif_conf.mono_conv = 0;
>> -
>> -	reg = TEGRA30_AHUB_CIF_RX_CTRL +
>> -	      (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
>> -	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
>> -
>> -	pm_runtime_put(ahub->dev);
>>   
>> -	return 0;
>> +	return tegra30_ahub_setup_rx_fifo(*rxcif, &cif_conf);
> 
> It seems a bit odd, that you still configure some of the cif_conf
> members and then call tegra30_ahub_setup_rx_fifo() here. Why not just
> allocate it and then move all the programming to
> tegra30_ahub_setup_rx_fifo()?

I was trying to keep the behaviour the same, IIRC the original is first
called before the format information is known.

>>   }
>>   EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_rx_fifo);
>>   
>> @@ -186,12 +191,40 @@ int tegra30_ahub_free_rx_fifo(enum tegra30_ahub_rxcif rxcif)
>>   }
>>   EXPORT_SYMBOL_GPL(tegra30_ahub_free_rx_fifo);
>>   
>> +int tegra30_ahub_setup_tx_fifo(enum tegra30_ahub_txcif txcif,
>> +			       struct tegra30_ahub_cif_conf *cif_conf)
>> +{
>> +	int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
>> +	u32 reg, val;
>> +
>> +	pm_runtime_get_sync(ahub->dev);
>> +
>> +	reg = TEGRA30_AHUB_CHANNEL_CTRL +
>> +	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
>> +	val = tegra30_apbif_read(reg);
>> +	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
>> +		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
>> +	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
>> +	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
>> +	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
>> +	tegra30_apbif_write(reg, val);
>> +
>> +	cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
>> +
>> +	reg = TEGRA30_AHUB_CIF_TX_CTRL +
>> +	      (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
>> +	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
>> +
>> +	pm_runtime_put(ahub->dev);
>> +	return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(tegra30_ahub_setup_tx_fifo);
>> +
>>   int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
>>   				  char *dmachan, int dmachan_len,
>>   				  dma_addr_t *fiforeg)
>>   {
>>   	int channel;
>> -	u32 reg, val;
>>   	struct tegra30_ahub_cif_conf cif_conf;
>>   
>>   	channel = find_first_zero_bit(ahub->tx_usage,
>> @@ -206,37 +239,14 @@ int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
>>   	*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_TXFIFO +
>>   		   (channel * TEGRA30_AHUB_CHANNEL_TXFIFO_STRIDE);
>>   
>> -	pm_runtime_get_sync(ahub->dev);
>> -
>> -	reg = TEGRA30_AHUB_CHANNEL_CTRL +
>> -	      (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
>> -	val = tegra30_apbif_read(reg);
>> -	val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
>> -		 TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
>> -	val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
>> -	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
>> -	       TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
>> -	tegra30_apbif_write(reg, val);
>> -
>> -	cif_conf.threshold = 0;
>> +	memset(&cif_conf, 0, sizeof(cif_conf));
>>   	cif_conf.audio_channels = 2;
>>   	cif_conf.client_channels = 2;
>>   	cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>>   	cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
>> -	cif_conf.expand = 0;
>> -	cif_conf.stereo_conv = 0;
>> -	cif_conf.replicate = 0;
>>   	cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
>> -	cif_conf.truncate = 0;
>> -	cif_conf.mono_conv = 0;
>> -
>> -	reg = TEGRA30_AHUB_CIF_TX_CTRL +
>> -	      (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
>> -	ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
>>   
>> -	pm_runtime_put(ahub->dev);
>> -
>> -	return 0;
>> +	return tegra30_ahub_setup_tx_fifo(*txcif, &cif_conf);
>>   }
>>   EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_tx_fifo);
>>   
>> diff --git a/sound/soc/tegra/tegra30_ahub.h b/sound/soc/tegra/tegra30_ahub.h
>> index 6889c5f23d02..26120aee64b3 100644
>> --- a/sound/soc/tegra/tegra30_ahub.h
>> +++ b/sound/soc/tegra/tegra30_ahub.h
>> @@ -490,6 +490,11 @@ void tegra30_ahub_set_cif(struct regmap *regmap, unsigned int reg,
>>   void tegra124_ahub_set_cif(struct regmap *regmap, unsigned int reg,
>>   			   struct tegra30_ahub_cif_conf *conf);
>>   
>> +extern int tegra30_ahub_setup_tx_fifo(enum tegra30_ahub_txcif txcif,
>> +				      struct tegra30_ahub_cif_conf *cif_conf);
>> +extern int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif,
>> +				      struct tegra30_ahub_cif_conf *cif_conf);
>> +
>>   struct tegra30_ahub_soc_data {
>>   	u32 mod_list_mask;
>>   	void (*set_audio_cif)(struct regmap *regmap,
>> diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
>> index a03692b0afc3..19ac49df6cc8 100644
>> --- a/sound/soc/tegra/tegra30_i2s.c
>> +++ b/sound/soc/tegra/tegra30_i2s.c
>> @@ -202,9 +202,11 @@ static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
>>   
>>   	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
>>   		cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
> 
> You set the direction here and then set it again in
> tegra30_ahub_setup_tx_fifo(). It only needs to be done once.

ok, will fix that.

>> +		tegra30_ahub_setup_tx_fifo(i2s->playback_fifo_cif, &cif_conf);
>>   		reg = TEGRA30_I2S_CIF_RX_CTRL;
>>   	} else {
>>   		cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
>> +		tegra30_ahub_setup_rx_fifo(i2s->capture_fifo_cif, &cif_conf);
>>   		reg = TEGRA30_I2S_CIF_TX_CTRL;
>>   	}
>>   
>>
> 
> Cheers
> Jon
> 


-- 
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Re: [alsa-devel] [PATCH v3 6/7] ASoC: tegra: config fifos on hw_param changes

[Jon Hunter]

On 04/10/2019 18:03, Ben Dooks wrote:
> On 30/09/2019 22:08, Jon Hunter wrote:
>>
>> On 30/09/2019 17:51, Ben Dooks wrote:
>>> If the hw_params uses a different bit or channel count, then we
>>> need to change both the I2S unit's CIF configuration as well as
>>> the APBIF one.
>>>
>>> To allow changing the APBIF, add a call to reconfigure the RX or
>>> TX FIFO without changing the DMA or allocation, and get the I2S
>>> driver to call it once the hw params have been calculate.
>>>
>>> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
>>> ---
>>>   sound/soc/tegra/tegra30_ahub.c | 114 ++++++++++++++++++---------------
>>>   sound/soc/tegra/tegra30_ahub.h |   5 ++
>>>   sound/soc/tegra/tegra30_i2s.c  |   2 +
>>>   3 files changed, 69 insertions(+), 52 deletions(-)
>>>
>>> diff --git a/sound/soc/tegra/tegra30_ahub.c
>>> b/sound/soc/tegra/tegra30_ahub.c
>>> index 952381260dc3..58e05ceb86da 100644
>>> --- a/sound/soc/tegra/tegra30_ahub.c
>>> +++ b/sound/soc/tegra/tegra30_ahub.c
>>> @@ -84,12 +84,40 @@ static int tegra30_ahub_runtime_resume(struct
>>> device *dev)
>>>       return 0;
>>>   }
>>>   +int tegra30_ahub_setup_rx_fifo(enum tegra30_ahub_rxcif rxcif,
>>> +                   struct tegra30_ahub_cif_conf *cif_conf)
>>> +{
>>> +    int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
>>> +    u32 reg, val;
>>> +
>>> +    pm_runtime_get_sync(ahub->dev);
>>> +
>>> +    reg = TEGRA30_AHUB_CHANNEL_CTRL +
>>> +          (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
>>> +    val = tegra30_apbif_read(reg);
>>> +    val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
>>> +         TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
>>> +    val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
>>> +           TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
>>> +           TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
>>> +    tegra30_apbif_write(reg, val);
>>> +
>>> +    cif_conf->direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
>>> +
>>> +    reg = TEGRA30_AHUB_CIF_RX_CTRL +
>>> +          (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
>>> +    ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, cif_conf);
>>> +
>>> +    pm_runtime_put(ahub->dev);
>>> +    return 0;
>>> +}
>>> +EXPORT_SYMBOL_GPL(tegra30_ahub_setup_rx_fifo);
>>> +
>>>   int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
>>>                     char *dmachan, int dmachan_len,
>>>                     dma_addr_t *fiforeg)
>>>   {
>>>       int channel;
>>> -    u32 reg, val;
>>>       struct tegra30_ahub_cif_conf cif_conf;
>>>         channel = find_first_zero_bit(ahub->rx_usage,
>>> @@ -104,37 +132,14 @@ int tegra30_ahub_allocate_rx_fifo(enum
>>> tegra30_ahub_rxcif *rxcif,
>>>       *fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO +
>>>              (channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
>>>   -    pm_runtime_get_sync(ahub->dev);
>>> +    memset(&cif_conf, 0, sizeof(cif_conf));
>>>   -    reg = TEGRA30_AHUB_CHANNEL_CTRL +
>>> -          (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
>>> -    val = tegra30_apbif_read(reg);
>>> -    val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
>>> -         TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
>>> -    val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
>>> -           TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
>>> -           TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
>>> -    tegra30_apbif_write(reg, val);
>>> -
>>> -    cif_conf.threshold = 0;
>>>       cif_conf.audio_channels = 2;
>>>       cif_conf.client_channels = 2;
>>>       cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
>>>       cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
>>> -    cif_conf.expand = 0;
>>> -    cif_conf.stereo_conv = 0;
>>> -    cif_conf.replicate = 0;
>>> -    cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
>>> -    cif_conf.truncate = 0;
>>> -    cif_conf.mono_conv = 0;
>>> -
>>> -    reg = TEGRA30_AHUB_CIF_RX_CTRL +
>>> -          (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
>>> -    ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
>>> -
>>> -    pm_runtime_put(ahub->dev);
>>>   -    return 0;
>>> +    return tegra30_ahub_setup_rx_fifo(*rxcif, &cif_conf);
>>
>> It seems a bit odd, that you still configure some of the cif_conf
>> members and then call tegra30_ahub_setup_rx_fifo() here. Why not just
>> allocate it and then move all the programming to
>> tegra30_ahub_setup_rx_fifo()?
> 
> I was trying to keep the behaviour the same, IIRC the original is first
> called before the format information is known.

Looks like the I2S driver is the only current user of this, so splitting
the function into two could make sense.

Cheers
Jon

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[alsa-devel] tegra30 tdm audio support

[Ben Dooks]

TDM audio support for tegra30 devices.

v2:
- moved edge-control and data-offset to the set_fmt callbacks
- fixed dev_dbg in set_tdm callback
- fixed dev_dbg message contents in set_tdm callback
- changed fsync width to be permanently 1 clock

v3:
- cleanup fsync patch
- fix rebase issue with tdm patch

v4:
- fix comment style issues
- change tdm-a to data-offset 1

v5:
- fix format on tdm-b



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