ASoC: sti: unip player tdm mode
here are the changes to enable player tdm mode: - When TDM_ENABLE is set to 1, the i2s format should be automatically configured. Unfortunately this is not the case (HW bug). Then, we shall force DATA_SIZE setting. - Compute the transfer size for tdm mode: transfer size = user frame size - Manage tdm slots configuration given in DT. - Don't use mclk-fs when unip in tdm mode; use tdm slot config to compute frame size and to set mclk rate. - Refine the hw param (channels & format) according to tdm slot config. Signed-off-by: Moise Gergaud <moise.gergaud@st.com> Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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7219978766
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8d8b1e2edd
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@ -181,10 +181,16 @@ int sti_uniperiph_dai_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
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struct uniperif *uni = priv->dai_data.uni;
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struct snd_dmaengine_dai_dma_data *dma_data;
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int transfer_size;
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transfer_size = params_channels(params) * UNIPERIF_FIFO_FRAMES;
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if (uni->info->type == SND_ST_UNIPERIF_TYPE_TDM)
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/* transfer size = user frame size (in 32-bits FIFO cell) */
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transfer_size = snd_soc_params_to_frame_size(params) / 32;
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else
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transfer_size = params_channels(params) * UNIPERIF_FIFO_FRAMES;
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dma_data = snd_soc_dai_get_dma_data(dai, substream);
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dma_data->maxburst = transfer_size;
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@ -1389,6 +1389,17 @@ int sti_uniperiph_dai_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai);
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static inline int sti_uniperiph_get_user_frame_size(
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struct snd_pcm_runtime *runtime)
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{
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return (runtime->channels * snd_pcm_format_width(runtime->format) / 8);
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}
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static inline int sti_uniperiph_get_unip_tdm_frame_size(struct uniperif *uni)
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{
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return (uni->tdm_slot.slots * uni->tdm_slot.slot_width / 8);
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}
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int sti_uniperiph_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
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unsigned int rx_mask, int slots,
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int slot_width);
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@ -435,18 +435,11 @@ static int uni_player_prepare_pcm(struct uniperif *player,
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/* Force slot width to 32 in I2S mode (HW constraint) */
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if ((player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) ==
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SND_SOC_DAIFMT_I2S) {
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SND_SOC_DAIFMT_I2S)
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slot_width = 32;
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} else {
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switch (runtime->format) {
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case SNDRV_PCM_FORMAT_S16_LE:
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slot_width = 16;
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break;
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default:
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slot_width = 32;
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break;
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}
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}
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else
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slot_width = snd_pcm_format_width(runtime->format);
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output_frame_size = slot_width * runtime->channels;
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clk_div = player->mclk / runtime->rate;
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@ -521,7 +514,6 @@ static int uni_player_prepare_pcm(struct uniperif *player,
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SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);
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SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
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SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
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/* No iec958 formatting as outputting to DAC */
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SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
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@ -529,6 +521,55 @@ static int uni_player_prepare_pcm(struct uniperif *player,
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return 0;
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}
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static int uni_player_prepare_tdm(struct uniperif *player,
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struct snd_pcm_runtime *runtime)
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{
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int tdm_frame_size; /* unip tdm frame size in bytes */
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int user_frame_size; /* user tdm frame size in bytes */
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/* default unip TDM_WORD_POS_X_Y */
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unsigned int word_pos[4] = {
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0x04060002, 0x0C0E080A, 0x14161012, 0x1C1E181A};
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int freq, ret;
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tdm_frame_size =
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sti_uniperiph_get_unip_tdm_frame_size(player);
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user_frame_size =
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sti_uniperiph_get_user_frame_size(runtime);
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/* fix 16/0 format */
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SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
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SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
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/* number of words inserted on the TDM line */
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SET_UNIPERIF_I2S_FMT_NUM_CH(player, user_frame_size / 4 / 2);
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SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
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SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
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/* Enable the tdm functionality */
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SET_UNIPERIF_TDM_ENABLE_TDM_ENABLE(player);
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/* number of 8 bits timeslots avail in unip tdm frame */
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SET_UNIPERIF_TDM_FS_REF_DIV_NUM_TIMESLOT(player, tdm_frame_size);
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/* set the timeslot allocation for words in FIFO */
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sti_uniperiph_get_tdm_word_pos(player, word_pos);
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SET_UNIPERIF_TDM_WORD_POS(player, 1_2, word_pos[WORD_1_2]);
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SET_UNIPERIF_TDM_WORD_POS(player, 3_4, word_pos[WORD_3_4]);
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SET_UNIPERIF_TDM_WORD_POS(player, 5_6, word_pos[WORD_5_6]);
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SET_UNIPERIF_TDM_WORD_POS(player, 7_8, word_pos[WORD_7_8]);
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/* set unip clk rate (not done vai set_sysclk ops) */
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freq = runtime->rate * tdm_frame_size * 8;
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mutex_lock(&player->ctrl_lock);
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ret = uni_player_clk_set_rate(player, freq);
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if (!ret)
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player->mclk = freq;
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mutex_unlock(&player->ctrl_lock);
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return 0;
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}
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/*
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* ALSA uniperipheral iec958 controls
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*/
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@ -659,11 +700,29 @@ static int uni_player_startup(struct snd_pcm_substream *substream,
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{
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struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
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struct uniperif *player = priv->dai_data.uni;
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int ret;
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player->substream = substream;
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player->clk_adj = 0;
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return 0;
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if (!UNIPERIF_TYPE_IS_TDM(player))
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return 0;
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/* refine hw constraint in tdm mode */
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ret = snd_pcm_hw_rule_add(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_CHANNELS,
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sti_uniperiph_fix_tdm_chan,
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player, SNDRV_PCM_HW_PARAM_CHANNELS,
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-1);
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if (ret < 0)
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return ret;
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return snd_pcm_hw_rule_add(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_FORMAT,
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sti_uniperiph_fix_tdm_format,
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player, SNDRV_PCM_HW_PARAM_FORMAT,
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-1);
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}
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static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id,
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@ -673,7 +732,7 @@ static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id,
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struct uniperif *player = priv->dai_data.uni;
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int ret;
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if (dir == SND_SOC_CLOCK_IN)
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if (UNIPERIF_TYPE_IS_TDM(player) || (dir == SND_SOC_CLOCK_IN))
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return 0;
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if (clk_id != 0)
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@ -705,7 +764,13 @@ static int uni_player_prepare(struct snd_pcm_substream *substream,
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}
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/* Calculate transfer size (in fifo cells and bytes) for frame count */
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transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;
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if (player->info->type == SND_ST_UNIPERIF_TYPE_TDM) {
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/* transfer size = user frame size (in 32 bits FIFO cell) */
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transfer_size =
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sti_uniperiph_get_user_frame_size(runtime) / 4;
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} else {
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transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;
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}
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/* Calculate number of empty cells available before asserting DREQ */
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if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
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@ -739,6 +804,9 @@ static int uni_player_prepare(struct snd_pcm_substream *substream,
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case SND_ST_UNIPERIF_TYPE_SPDIF:
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ret = uni_player_prepare_iec958(player, runtime);
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break;
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case SND_ST_UNIPERIF_TYPE_TDM:
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ret = uni_player_prepare_tdm(player, runtime);
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break;
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default:
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dev_err(player->dev, "invalid player type");
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return -EINVAL;
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@ -1008,6 +1076,8 @@ static int uni_player_parse_dt(struct platform_device *pdev,
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info->type = SND_ST_UNIPERIF_TYPE_PCM;
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else if (strcasecmp(mode, "spdif") == 0)
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info->type = SND_ST_UNIPERIF_TYPE_SPDIF;
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else if (strcasecmp(mode, "tdm") == 0)
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info->type = SND_ST_UNIPERIF_TYPE_TDM;
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else
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info->type = SND_ST_UNIPERIF_TYPE_NONE;
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@ -1028,7 +1098,8 @@ static const struct snd_soc_dai_ops uni_player_dai_ops = {
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.trigger = uni_player_trigger,
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.hw_params = sti_uniperiph_dai_hw_params,
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.set_fmt = sti_uniperiph_dai_set_fmt,
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.set_sysclk = uni_player_set_sysclk
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.set_sysclk = uni_player_set_sysclk,
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.set_tdm_slot = sti_uniperiph_set_tdm_slot
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};
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int uni_player_init(struct platform_device *pdev,
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@ -1038,7 +1109,6 @@ int uni_player_init(struct platform_device *pdev,
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player->dev = &pdev->dev;
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player->state = UNIPERIF_STATE_STOPPED;
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player->hw = &uni_player_pcm_hw;
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player->dai_ops = &uni_player_dai_ops;
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ret = uni_player_parse_dt(pdev, player);
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@ -1048,6 +1118,11 @@ int uni_player_init(struct platform_device *pdev,
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return ret;
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}
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if (UNIPERIF_TYPE_IS_TDM(player))
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player->hw = &uni_tdm_hw;
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else
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player->hw = &uni_player_pcm_hw;
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/* Get uniperif resource */
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player->clk = of_clk_get(pdev->dev.of_node, 0);
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if (IS_ERR(player->clk))
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