On 09/09/2015 09:27 PM, Jyri Sarha wrote:

The TX and RX direction share the same bit clock and frame sync, so the samplerate must be the same to both directions.

Acked-by: Peter Ujfalusi peter.ujfalusi@ti.com

Signed-off-by: Jyri Sarha jsarha@ti.com

sound/soc/davinci/davinci-mcasp.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index fa0511b..bbd1987 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -1304,6 +1304,7 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = { .ops = &davinci_mcasp_dai_ops,

.symmetric_samplebits	= 1,

• .symmetric_rates	= 1,
  

  }, { .name = "davinci-mcasp.1",

The patch

ASoC: simple-card: Add tdm slot mask support to simple-card

has been applied to the asoc tree at

git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From 6131084a0bc966107021d8c89489f9cd1663b902 Mon Sep 17 00:00:00 2001

From: Jyri Sarha jsarha@ti.com Date: Wed, 9 Sep 2015 21:27:43 +0300 Subject: [PATCH] ASoC: simple-card: Add tdm slot mask support to simple-card

Adds DT binding for explicitly choosing a tdm mask for DAI and uses it in simple-card. The API for snd_soc_of_parse_tdm_slot() has also been changed.

Signed-off-by: Jyri Sarha jsarha@ti.com Signed-off-by: Mark Brown broonie@kernel.org --- .../devicetree/bindings/sound/tdm-slot.txt | 11 +++++++++- include/sound/simple_card.h | 2 ++ include/sound/soc.h | 2 ++ sound/soc/generic/simple-card.c | 8 +++++-- sound/soc/soc-core.c | 25 ++++++++++++++++++++++ 5 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/tdm-slot.txt b/Documentation/devicetree/bindings/sound/tdm-slot.txt index 6a2c842..34cf70e 100644 --- a/Documentation/devicetree/bindings/sound/tdm-slot.txt +++ b/Documentation/devicetree/bindings/sound/tdm-slot.txt @@ -4,11 +4,15 @@ This specifies audio DAI's TDM slot.

TDM slot properties: dai-tdm-slot-num : Number of slots in use. -dai-tdm-slot-width : Width in bits for each slot. +dai-tdm-slot-width : Width in bits for each slot. +dai-tdm-slot-tx-mask : Transmit direction slot mask, optional +dai-tdm-slot-rx-mask : Receive direction slot mask, optional

For instance: dai-tdm-slot-num = <2>; dai-tdm-slot-width = <8>; + dai-tdm-slot-tx-mask = <0 1>; + dai-tdm-slot-rx-mask = <1 0>;

And for each spcified driver, there could be one .of_xlate_tdm_slot_mask() to specify a explicit mapping of the channels and the slots. If it's absent @@ -18,3 +22,8 @@ tx and rx masks. For snd_soc_of_xlate_tdm_slot_mask(), the tx and rx masks will use a 1 bit for an active slot as default, and the default active bits are at the LSB of the masks. + +The explicit masks are given as array of integers, where the first +number presents bit-0 (LSB), second presents bit-1, etc. Any non zero +number is considered 1 and 0 is 0. snd_soc_of_xlate_tdm_slot_mask() +does not do anything, if either mask is set non zero value. diff --git a/include/sound/simple_card.h b/include/sound/simple_card.h index b9b4f28..0399352 100644 --- a/include/sound/simple_card.h +++ b/include/sound/simple_card.h @@ -19,6 +19,8 @@ struct asoc_simple_dai { unsigned int sysclk; int slots; int slot_width; + unsigned int tx_slot_mask; + unsigned int rx_slot_mask; struct clk *clk; };

diff --git a/include/sound/soc.h b/include/sound/soc.h index 884e728..a76622d 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1601,6 +1601,8 @@ int snd_soc_of_parse_card_name(struct snd_soc_card *card, int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card, const char *propname); int snd_soc_of_parse_tdm_slot(struct device_node *np, + unsigned int *tx_mask, + unsigned int *rx_mask, unsigned int *slots, unsigned int *slot_width); void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card, diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c index 3ff76d4..54c3320 100644 --- a/sound/soc/generic/simple-card.c +++ b/sound/soc/generic/simple-card.c @@ -151,7 +151,9 @@ static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai, }

if (set->slots) { - ret = snd_soc_dai_set_tdm_slot(dai, 0, 0, + ret = snd_soc_dai_set_tdm_slot(dai, + set->tx_slot_mask, + set->rx_slot_mask, set->slots, set->slot_width); if (ret && ret != -ENOTSUPP) { @@ -243,7 +245,9 @@ asoc_simple_card_sub_parse_of(struct device_node *np, return ret;

/* Parse TDM slot */ - ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width); + ret = snd_soc_of_parse_tdm_slot(np, &dai->tx_slot_mask, + &dai->rx_slot_mask, + &dai->slots, &dai->slot_width); if (ret) return ret;

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 6173d15..c5e21ca 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -3291,13 +3291,38 @@ int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card, } EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);

+static int snd_soc_of_get_slot_mask(struct device_node *np, + const char *prop_name, + unsigned int *mask) +{ + u32 val; + const u32 *of_slot_mask = of_get_property(np, prop_name, &val); + int i; + + if (!of_slot_mask) + return 0; + val /= sizeof(u32); + for (i = 0; i < val; i++) + if (be32_to_cpup(&of_slot_mask[i])) + *mask |= (1 << i); + + return val; +} + int snd_soc_of_parse_tdm_slot(struct device_node *np, + unsigned int *tx_mask, + unsigned int *rx_mask, unsigned int *slots, unsigned int *slot_width) { u32 val; int ret;

+ if (tx_mask) + snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask); + if (rx_mask) + snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask); + if (of_property_read_bool(np, "dai-tdm-slot-num")) { ret = of_property_read_u32(np, "dai-tdm-slot-num", &val); if (ret)

The patch

ASoC: davinci-mcasp: Add set_tdm_slots() support

has been applied to the asoc tree at

git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From dd55ff8346a972cca1ad056c8258ee96d090633e Mon Sep 17 00:00:00 2001

From: Jyri Sarha jsarha@ti.com Date: Wed, 9 Sep 2015 21:27:44 +0300 Subject: [PATCH] ASoC: davinci-mcasp: Add set_tdm_slots() support

Implements set_tdm_slot() callback for mcasp. Channel constraints are updated according to the configured tdm mask and slots each time set_tdm_slot() is called. The special case when slot width is set to zero is allowed and it means that slot width is the same as the sample width.

Signed-off-by: Jyri Sarha jsarha@ti.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/davinci/davinci-mcasp.c | 255 ++++++++++++++++++++++++++------------ 1 file changed, 174 insertions(+), 81 deletions(-)

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index add6bb9..fa47a39 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -80,6 +80,8 @@ struct davinci_mcasp {

/* McASP specific data */ int tdm_slots; + u32 tdm_mask[2]; + int slot_width; u8 op_mode; u8 num_serializer; u8 *serial_dir; @@ -596,6 +598,84 @@ static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id, return 0; }

+/* All serializers must have equal number of channels */ +static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream, + int serializers) +{ + struct snd_pcm_hw_constraint_list *cl = &mcasp->chconstr[stream]; + unsigned int *list = (unsigned int *) cl->list; + int slots = mcasp->tdm_slots; + int i, count = 0; + + if (mcasp->tdm_mask[stream]) + slots = hweight32(mcasp->tdm_mask[stream]); + + for (i = 2; i <= slots; i++) + list[count++] = i; + + for (i = 2; i <= serializers; i++) + list[count++] = i*slots; + + cl->count = count; + + return 0; +} + +static int davinci_mcasp_set_ch_constraints(struct davinci_mcasp *mcasp) +{ + int rx_serializers = 0, tx_serializers = 0, ret, i; + + for (i = 0; i < mcasp->num_serializer; i++) + if (mcasp->serial_dir[i] == TX_MODE) + tx_serializers++; + else if (mcasp->serial_dir[i] == RX_MODE) + rx_serializers++; + + ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_PLAYBACK, + tx_serializers); + if (ret) + return ret; + + ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_CAPTURE, + rx_serializers); + + return ret; +} + + +static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai, + unsigned int tx_mask, + unsigned int rx_mask, + int slots, int slot_width) +{ + struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); + + dev_dbg(mcasp->dev, + "%s() tx_mask 0x%08x rx_mask 0x%08x slots %d width %d\n", + __func__, tx_mask, rx_mask, slots, slot_width); + + if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) { + dev_err(mcasp->dev, + "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n", + tx_mask, rx_mask, slots); + return -EINVAL; + } + + if (slot_width && + (slot_width < 8 || slot_width > 32 || slot_width % 4 != 0)) { + dev_err(mcasp->dev, "%s: Unsupported slot_width %d\n", + __func__, slot_width); + return -EINVAL; + } + + mcasp->tdm_slots = slots; + mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = rx_mask; + mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = tx_mask; + mcasp->slot_width = slot_width; + + return davinci_mcasp_set_ch_constraints(mcasp); +} + static int davinci_config_channel_size(struct davinci_mcasp *mcasp, int word_length) { @@ -632,6 +712,9 @@ static int davinci_config_channel_size(struct davinci_mcasp *mcasp, */ rx_rotate = (slot_length - word_length) / 4; word_length = slot_length; + } else if (mcasp->slot_width) { + rx_rotate = (mcasp->slot_width - word_length) / 4; + word_length = mcasp->slot_width; }

/* mapping of the XSSZ bit-field as described in the datasheet */ @@ -777,33 +860,50 @@ static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream,

/* * If more than one serializer is needed, then use them with - * their specified tdm_slots count. Otherwise, one serializer - * can cope with the transaction using as many slots as channels - * in the stream, requires channels symmetry + * all the specified tdm_slots. Otherwise, one serializer can + * cope with the transaction using just as many slots as there + * are channels in the stream. */ - active_serializers = (channels + total_slots - 1) / total_slots; - if (active_serializers == 1) - active_slots = channels; - else - active_slots = total_slots; - - for (i = 0; i < active_slots; i++) - mask |= (1 << i); + if (mcasp->tdm_mask[stream]) { + active_slots = hweight32(mcasp->tdm_mask[stream]); + active_serializers = (channels + active_slots - 1) / + active_slots; + if (active_serializers == 1) { + active_slots = channels; + for (i = 0; i < total_slots; i++) { + if ((1 << i) & mcasp->tdm_mask[stream]) { + mask |= (1 << i); + if (--active_slots <= 0) + break; + } + } + } + } else { + active_serializers = (channels + total_slots - 1) / total_slots; + if (active_serializers == 1) + active_slots = channels; + else + active_slots = total_slots;

+ for (i = 0; i < active_slots; i++) + mask |= (1 << i); + } mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);

if (!mcasp->dat_port) busel = TXSEL;

- mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask); - mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD); - mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, - FSXMOD(total_slots), FSXMOD(0x1FF)); - - mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask); - mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD); - mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, - FSRMOD(total_slots), FSRMOD(0x1FF)); + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask); + mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD); + mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, + FSXMOD(total_slots), FSXMOD(0x1FF)); + } else if (stream == SNDRV_PCM_STREAM_CAPTURE) { + mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask); + mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD); + mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, + FSRMOD(total_slots), FSRMOD(0x1FF)); + }

return 0; } @@ -923,6 +1023,9 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream, int sbits = params_width(params); int ppm, div;

+ if (mcasp->slot_width) + sbits = mcasp->slot_width; + div = davinci_mcasp_calc_clk_div(mcasp, rate*sbits*slots, &ppm); if (ppm) @@ -1028,6 +1131,9 @@ static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_interval range; int i;

+ if (rd->mcasp->slot_width) + sbits = rd->mcasp->slot_width; + snd_interval_any(&range); range.empty = 1;

@@ -1070,10 +1176,14 @@ static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,

for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) { if (snd_mask_test(fmt, i)) { - uint bclk_freq = snd_pcm_format_width(i)*slots*rate; + uint sbits = snd_pcm_format_width(i); int ppm;

- davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq, &ppm); + if (rd->mcasp->slot_width) + sbits = rd->mcasp->slot_width; + + davinci_mcasp_calc_clk_div(rd->mcasp, sbits*slots*rate, + &ppm); if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) { snd_mask_set(&nfmt, i); count++; @@ -1095,6 +1205,10 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream, &mcasp->ruledata[substream->stream]; u32 max_channels = 0; int i, dir; + int tdm_slots = mcasp->tdm_slots; + + if (mcasp->tdm_mask[substream->stream]) + tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]);

mcasp->substreams[substream->stream] = substream;

@@ -1115,7 +1229,7 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream, max_channels++; } ruledata->serializers = max_channels; - max_channels *= mcasp->tdm_slots; + max_channels *= tdm_slots; /* * If the already active stream has less channels than the calculated * limnit based on the seirializers * tdm_slots, we need to use that as @@ -1125,15 +1239,25 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream, */ if (mcasp->channels && mcasp->channels < max_channels) max_channels = mcasp->channels; + /* + * But we can always allow channels upto the amount of + * the available tdm_slots. + */ + if (max_channels < tdm_slots) + max_channels = tdm_slots;

snd_pcm_hw_constraint_minmax(substream->runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2, max_channels);

- if (mcasp->chconstr[substream->stream].count) - snd_pcm_hw_constraint_list(substream->runtime, - 0, SNDRV_PCM_HW_PARAM_CHANNELS, - &mcasp->chconstr[substream->stream]); + snd_pcm_hw_constraint_list(substream->runtime, + 0, SNDRV_PCM_HW_PARAM_CHANNELS, + &mcasp->chconstr[substream->stream]); + + if (mcasp->slot_width) + snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_SAMPLE_BITS, + 8, mcasp->slot_width);

/* * If we rely on implicit BCLK divider setting we should @@ -1185,6 +1309,7 @@ static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = { .set_fmt = davinci_mcasp_set_dai_fmt, .set_clkdiv = davinci_mcasp_set_clkdiv, .set_sysclk = davinci_mcasp_set_sysclk, + .set_tdm_slot = davinci_mcasp_set_tdm_slot, };

static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai) @@ -1514,59 +1639,6 @@ nodata: return pdata; }

-/* All serializers must have equal number of channels */ -static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, - struct snd_pcm_hw_constraint_list *cl, - int serializers) -{ - unsigned int *list; - int i, count = 0; - - if (serializers <= 1) - return 0; - - list = devm_kzalloc(mcasp->dev, sizeof(unsigned int) * - (mcasp->tdm_slots + serializers - 2), - GFP_KERNEL); - if (!list) - return -ENOMEM; - - for (i = 2; i <= mcasp->tdm_slots; i++) - list[count++] = i; - - for (i = 2; i <= serializers; i++) - list[count++] = i*mcasp->tdm_slots; - - cl->count = count; - cl->list = list; - - return 0; -} - - -static int davinci_mcasp_init_ch_constraints(struct davinci_mcasp *mcasp) -{ - int rx_serializers = 0, tx_serializers = 0, ret, i; - - for (i = 0; i < mcasp->num_serializer; i++) - if (mcasp->serial_dir[i] == TX_MODE) - tx_serializers++; - else if (mcasp->serial_dir[i] == RX_MODE) - rx_serializers++; - - ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[ - SNDRV_PCM_STREAM_PLAYBACK], - tx_serializers); - if (ret) - return ret; - - ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[ - SNDRV_PCM_STREAM_CAPTURE], - rx_serializers); - - return ret; -} - enum { PCM_EDMA, PCM_SDMA, @@ -1783,7 +1855,28 @@ static int davinci_mcasp_probe(struct platform_device *pdev) mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE; }

- ret = davinci_mcasp_init_ch_constraints(mcasp); + /* Allocate memory for long enough list for all possible + * scenarios. Maximum number tdm slots is 32 and there cannot + * be more serializers than given in the configuration. The + * serializer directions could be taken into account, but it + * would make code much more complex and save only couple of + * bytes. + */ + mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list = + devm_kzalloc(mcasp->dev, sizeof(unsigned int) * + (32 + mcasp->num_serializer - 2), + GFP_KERNEL); + + mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list = + devm_kzalloc(mcasp->dev, sizeof(unsigned int) * + (32 + mcasp->num_serializer - 2), + GFP_KERNEL); + + if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list || + !mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list) + return -ENOMEM; + + ret = davinci_mcasp_set_ch_constraints(mcasp); if (ret) goto err;

On 09/09/15 21:27, Jyri Sarha wrote:

The slot_width is for essentially same thing. Instead of storing bclk_lrclk_ratio, just store the slot_width. Comments has been updated accordingly and some variable names changed to more descriptive.

Signed-off-by: Jyri Sarha jsarha@ti.com

sound/soc/davinci/davinci-mcasp.c | 56 ++++++++++++++++++++++----------------- 1 file changed, 31 insertions(+), 25 deletions(-)

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index de1e3a8..25ff1fc 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -87,7 +87,6 @@ struct davinci_mcasp { u8 *serial_dir; u8 version; u8 bclk_div;

• u16 bclk_lrclk_ratio; int streams; u32 irq_request[2]; int dma_request[2];

@@ -558,8 +557,21 @@ static int __davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, mcasp->bclk_div = div; break;

• case 2: /* BCLK/LRCLK ratio */

• mcasp->bclk_lrclk_ratio = div;
  

• case 2: /*

•  * BCLK/LRCLK ratio descries how many bit-clock cycles
  

•  * fit into one frame. The clock ratio is given for a
  

•  * full period of data (for I2S format both left and
  

•  * right channels), so it has to be divided by number
  

•  * of tdm-slots (for I2S - divided by 2).
  

•  * Instead of storing this ratio, we calculate a new
  

•  * tdm_slot width by dividing the the ratio by the
  

•  * number of configured tdm slots.
  

•  */
  

• mcasp->slot_width = div / mcasp->tdm_slots;
  

• if (div % mcasp->tdm_slots)
  

• 	dev_warn(mcasp->dev,
  

• 		 "%s(): BCLK/LRCLK %d is not divisible by %d tdm slots",
  

• 		 div, mcasp->tdm_slots);
  

Oops, there is a __func__ missing here.

break;

default: @@ -682,11 +694,13 @@ static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai, }

static int davinci_config_channel_size(struct davinci_mcasp *mcasp,

• 		       int word_length)
  

• 		       int sample_width)
  

  { u32 fmt;

• u32 tx_rotate = (word_length / 4) & 0x7;
• u32 mask = (1ULL << word_length) - 1;

• u32 tx_rotate = (sample_width / 4) & 0x7;
• u32 mask = (1ULL << sample_width) - 1;
• u32 slot_width = sample_width;
• /*
  • For captured data we should not rotate, inversion and masking is
  • enoguh to get the data to the right position:

@@ -699,31 +713,23 @@ static int davinci_config_channel_size(struct davinci_mcasp *mcasp, u32 rx_rotate = 0;

/*

• * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
  

• * callback, take it into account here. That allows us to for example
  

• * send 32 bits per channel to the codec, while only 16 of them carry
  

• * audio payload.
  

• * The clock ratio is given for a full period of data (for I2S format
  

• * both left and right channels), so it has to be divided by number of
  

• * tdm-slots (for I2S - divided by 2).
  

• * Setting the tdm slot width either with set_clkdiv() or
  

• * set_tdm_slot() allows us to for example send 32 bits per
  

• * channel to the codec, while only 16 of them carry audio
  

• * payload.
  

  */

• if (mcasp->bclk_lrclk_ratio) {

• u32 slot_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
  

• if (mcasp->slot_width) { /*

•  * When we have more bclk then it is needed for the data, we
  

•  * need to use the rotation to move the received samples to have
  

•  * correct alignment.
  

•  * When we have more bclk then it is needed for the
  

•  * data, we need to use the rotation to move the
  

•  * received samples to have correct alignment.
  

  */

• rx_rotate = (slot_length - word_length) / 4;
  

• word_length = slot_length;
  

• } else if (mcasp->slot_width) {

• rx_rotate = (mcasp->slot_width - word_length) / 4;
  

• word_length = mcasp->slot_width;
  

• slot_width = mcasp->slot_width;
  

• rx_rotate = (slot_width - sample_width) / 4;
  

  }

  /* mapping of the XSSZ bit-field as described in the datasheet */

• fmt = (word_length >> 1) - 1;

• fmt = (slot_width >> 1) - 1;

  if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) { mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),