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
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@ -80,6 +80,8 @@ struct davinci_mcasp {
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/* McASP specific data */
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int tdm_slots;
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u32 tdm_mask[2];
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int slot_width;
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u8 op_mode;
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u8 num_serializer;
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u8 *serial_dir;
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@ -596,6 +598,84 @@ static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
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return 0;
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}
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/* All serializers must have equal number of channels */
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static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream,
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int serializers)
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{
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struct snd_pcm_hw_constraint_list *cl = &mcasp->chconstr[stream];
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unsigned int *list = (unsigned int *) cl->list;
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int slots = mcasp->tdm_slots;
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int i, count = 0;
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if (mcasp->tdm_mask[stream])
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slots = hweight32(mcasp->tdm_mask[stream]);
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for (i = 2; i <= slots; i++)
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list[count++] = i;
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for (i = 2; i <= serializers; i++)
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list[count++] = i*slots;
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cl->count = count;
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return 0;
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}
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static int davinci_mcasp_set_ch_constraints(struct davinci_mcasp *mcasp)
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{
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int rx_serializers = 0, tx_serializers = 0, ret, i;
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for (i = 0; i < mcasp->num_serializer; i++)
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if (mcasp->serial_dir[i] == TX_MODE)
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tx_serializers++;
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else if (mcasp->serial_dir[i] == RX_MODE)
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rx_serializers++;
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ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_PLAYBACK,
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tx_serializers);
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if (ret)
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return ret;
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ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_CAPTURE,
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rx_serializers);
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return ret;
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}
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static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai,
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unsigned int tx_mask,
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unsigned int rx_mask,
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int slots, int slot_width)
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{
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struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
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dev_dbg(mcasp->dev,
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"%s() tx_mask 0x%08x rx_mask 0x%08x slots %d width %d\n",
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__func__, tx_mask, rx_mask, slots, slot_width);
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if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) {
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dev_err(mcasp->dev,
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"Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n",
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tx_mask, rx_mask, slots);
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return -EINVAL;
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}
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if (slot_width &&
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(slot_width < 8 || slot_width > 32 || slot_width % 4 != 0)) {
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dev_err(mcasp->dev, "%s: Unsupported slot_width %d\n",
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__func__, slot_width);
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return -EINVAL;
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}
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mcasp->tdm_slots = slots;
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mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = rx_mask;
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mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = tx_mask;
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mcasp->slot_width = slot_width;
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return davinci_mcasp_set_ch_constraints(mcasp);
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}
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static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
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int word_length)
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{
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@ -632,6 +712,9 @@ static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
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*/
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rx_rotate = (slot_length - word_length) / 4;
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word_length = slot_length;
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} else if (mcasp->slot_width) {
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rx_rotate = (mcasp->slot_width - word_length) / 4;
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word_length = mcasp->slot_width;
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}
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/* mapping of the XSSZ bit-field as described in the datasheet */
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@ -777,33 +860,50 @@ static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream,
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/*
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* If more than one serializer is needed, then use them with
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* their specified tdm_slots count. Otherwise, one serializer
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* can cope with the transaction using as many slots as channels
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* in the stream, requires channels symmetry
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* all the specified tdm_slots. Otherwise, one serializer can
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* cope with the transaction using just as many slots as there
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* are channels in the stream.
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*/
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active_serializers = (channels + total_slots - 1) / total_slots;
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if (active_serializers == 1)
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active_slots = channels;
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else
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active_slots = total_slots;
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for (i = 0; i < active_slots; i++)
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mask |= (1 << i);
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if (mcasp->tdm_mask[stream]) {
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active_slots = hweight32(mcasp->tdm_mask[stream]);
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active_serializers = (channels + active_slots - 1) /
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active_slots;
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if (active_serializers == 1) {
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active_slots = channels;
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for (i = 0; i < total_slots; i++) {
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if ((1 << i) & mcasp->tdm_mask[stream]) {
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mask |= (1 << i);
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if (--active_slots <= 0)
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break;
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}
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}
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}
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} else {
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active_serializers = (channels + total_slots - 1) / total_slots;
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if (active_serializers == 1)
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active_slots = channels;
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else
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active_slots = total_slots;
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for (i = 0; i < active_slots; i++)
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mask |= (1 << i);
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}
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mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
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if (!mcasp->dat_port)
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busel = TXSEL;
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mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
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mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
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mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
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FSXMOD(total_slots), FSXMOD(0x1FF));
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mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
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mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
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mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
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FSRMOD(total_slots), FSRMOD(0x1FF));
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if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
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mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
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mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
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mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
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FSXMOD(total_slots), FSXMOD(0x1FF));
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} else if (stream == SNDRV_PCM_STREAM_CAPTURE) {
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mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
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mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
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mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
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FSRMOD(total_slots), FSRMOD(0x1FF));
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}
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return 0;
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}
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@ -923,6 +1023,9 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
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int sbits = params_width(params);
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int ppm, div;
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if (mcasp->slot_width)
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sbits = mcasp->slot_width;
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div = davinci_mcasp_calc_clk_div(mcasp, rate*sbits*slots,
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&ppm);
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if (ppm)
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@ -1028,6 +1131,9 @@ static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params,
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struct snd_interval range;
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int i;
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if (rd->mcasp->slot_width)
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sbits = rd->mcasp->slot_width;
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snd_interval_any(&range);
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range.empty = 1;
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@ -1070,10 +1176,14 @@ static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,
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for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
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if (snd_mask_test(fmt, i)) {
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uint bclk_freq = snd_pcm_format_width(i)*slots*rate;
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uint sbits = snd_pcm_format_width(i);
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int ppm;
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davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq, &ppm);
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if (rd->mcasp->slot_width)
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sbits = rd->mcasp->slot_width;
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davinci_mcasp_calc_clk_div(rd->mcasp, sbits*slots*rate,
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&ppm);
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if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
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snd_mask_set(&nfmt, i);
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count++;
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@ -1095,6 +1205,10 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
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&mcasp->ruledata[substream->stream];
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u32 max_channels = 0;
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int i, dir;
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int tdm_slots = mcasp->tdm_slots;
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if (mcasp->tdm_mask[substream->stream])
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tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]);
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mcasp->substreams[substream->stream] = substream;
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@ -1115,7 +1229,7 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
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max_channels++;
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}
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ruledata->serializers = max_channels;
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max_channels *= mcasp->tdm_slots;
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max_channels *= tdm_slots;
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/*
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* If the already active stream has less channels than the calculated
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* limnit based on the seirializers * tdm_slots, we need to use that as
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@ -1125,15 +1239,25 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
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*/
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if (mcasp->channels && mcasp->channels < max_channels)
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max_channels = mcasp->channels;
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/*
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* But we can always allow channels upto the amount of
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* the available tdm_slots.
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*/
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if (max_channels < tdm_slots)
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max_channels = tdm_slots;
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snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_CHANNELS,
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2, max_channels);
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if (mcasp->chconstr[substream->stream].count)
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snd_pcm_hw_constraint_list(substream->runtime,
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0, SNDRV_PCM_HW_PARAM_CHANNELS,
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&mcasp->chconstr[substream->stream]);
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snd_pcm_hw_constraint_list(substream->runtime,
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0, SNDRV_PCM_HW_PARAM_CHANNELS,
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&mcasp->chconstr[substream->stream]);
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if (mcasp->slot_width)
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snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
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8, mcasp->slot_width);
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/*
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* If we rely on implicit BCLK divider setting we should
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@ -1185,6 +1309,7 @@ static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
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.set_fmt = davinci_mcasp_set_dai_fmt,
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.set_clkdiv = davinci_mcasp_set_clkdiv,
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.set_sysclk = davinci_mcasp_set_sysclk,
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.set_tdm_slot = davinci_mcasp_set_tdm_slot,
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};
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static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
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@ -1514,59 +1639,6 @@ nodata:
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return pdata;
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}
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/* All serializers must have equal number of channels */
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static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp,
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struct snd_pcm_hw_constraint_list *cl,
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int serializers)
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{
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unsigned int *list;
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int i, count = 0;
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if (serializers <= 1)
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return 0;
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list = devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
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(mcasp->tdm_slots + serializers - 2),
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GFP_KERNEL);
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if (!list)
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return -ENOMEM;
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for (i = 2; i <= mcasp->tdm_slots; i++)
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list[count++] = i;
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for (i = 2; i <= serializers; i++)
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list[count++] = i*mcasp->tdm_slots;
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cl->count = count;
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cl->list = list;
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return 0;
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}
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static int davinci_mcasp_init_ch_constraints(struct davinci_mcasp *mcasp)
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{
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int rx_serializers = 0, tx_serializers = 0, ret, i;
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for (i = 0; i < mcasp->num_serializer; i++)
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if (mcasp->serial_dir[i] == TX_MODE)
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tx_serializers++;
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else if (mcasp->serial_dir[i] == RX_MODE)
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rx_serializers++;
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ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[
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SNDRV_PCM_STREAM_PLAYBACK],
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tx_serializers);
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if (ret)
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return ret;
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ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[
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SNDRV_PCM_STREAM_CAPTURE],
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rx_serializers);
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return ret;
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}
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enum {
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PCM_EDMA,
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PCM_SDMA,
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@ -1783,7 +1855,28 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
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mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
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}
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ret = davinci_mcasp_init_ch_constraints(mcasp);
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/* Allocate memory for long enough list for all possible
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* scenarios. Maximum number tdm slots is 32 and there cannot
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* be more serializers than given in the configuration. The
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* serializer directions could be taken into account, but it
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* would make code much more complex and save only couple of
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* bytes.
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*/
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mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list =
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devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
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(32 + mcasp->num_serializer - 2),
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GFP_KERNEL);
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mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list =
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devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
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(32 + mcasp->num_serializer - 2),
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GFP_KERNEL);
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if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list ||
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!mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list)
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return -ENOMEM;
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ret = davinci_mcasp_set_ch_constraints(mcasp);
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if (ret)
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goto err;
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