mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
Jyri Sarha
Mark Brown
parent
6ff33f3902
commit
dd55ff8346
|
|
@ -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 @@ static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
|
|||
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;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue