ASoC: fsl_sai: add several improvements

Merge series from Shengjiu Wang <shengjiu.wang@nxp.com>:

Add several improvements for the sai interface.
1.allow to set mclk rate with zero clk_id for master mode
2.add xlate_tdm_slot_mask() callback to avoid channel constrain
3.separate 'is_dsp_mode' for tx and rx
4.separate set_tdm_slot() for tx and rx

2 files changed, 65 insertions, 31 deletions

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index ed2b4780c470..af1a168d35e3 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -163,14 +163,46 @@ out:
 	return iret;
 }
 
-static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
-				u32 rx_mask, int slots, int slot_width)
+static int fsl_sai_set_dai_tdm_slot_tx(struct snd_soc_dai *cpu_dai, u32 tx_mask,
+				       u32 rx_mask, int slots, int slot_width)
 {
 	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+	bool tx = true;
+
+	sai->slots[tx] = slots;
+	sai->slot_width[tx] = slot_width;
+
+	return 0;
+}
+
+static int fsl_sai_set_dai_tdm_slot_rx(struct snd_soc_dai *cpu_dai, u32 tx_mask,
+				       u32 rx_mask, int slots, int slot_width)
+{
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+	bool tx = false;
+
+	sai->slots[tx] = slots;
+	sai->slot_width[tx] = slot_width;
+
+	return 0;
+}
+
+static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
+				    u32 rx_mask, int slots, int slot_width)
+{
+	int ret;
+
+	ret = fsl_sai_set_dai_tdm_slot_tx(cpu_dai, tx_mask, rx_mask, slots, slot_width);
+	if (ret)
+		return ret;
 
-	sai->slots = slots;
-	sai->slot_width = slot_width;
+	return fsl_sai_set_dai_tdm_slot_rx(cpu_dai, tx_mask, rx_mask, slots, slot_width);
+}
 
+static int fsl_sai_xlate_tdm_slot_mask(unsigned int slots,
+				       unsigned int *tx_mask, unsigned int *rx_mask)
+{
+	/* Leave it empty, don't change the value of tx_mask and rx_mask */
 	return 0;
 }
 
@@ -238,22 +270,22 @@ static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 	if (dir == SND_SOC_CLOCK_IN)
 		return 0;
 
-	if (freq > 0 && clk_id != FSL_SAI_CLK_BUS) {
-		if (clk_id < 0 || clk_id >= FSL_SAI_MCLK_MAX) {
-			dev_err(cpu_dai->dev, "Unknown clock id: %d\n", clk_id);
-			return -EINVAL;
-		}
+	if (clk_id < 0 || clk_id >= FSL_SAI_MCLK_MAX) {
+		dev_err(cpu_dai->dev, "Unknown clock id: %d\n", clk_id);
+		return -EINVAL;
+	}
 
-		if (IS_ERR_OR_NULL(sai->mclk_clk[clk_id])) {
-			dev_err(cpu_dai->dev, "Unassigned clock: %d\n", clk_id);
-			return -EINVAL;
-		}
+	if (IS_ERR_OR_NULL(sai->mclk_clk[clk_id])) {
+		dev_err(cpu_dai->dev, "Unassigned clock: %d\n", clk_id);
+		return -EINVAL;
+	}
 
-		if (sai->mclk_streams == 0) {
-			ret = fsl_sai_set_mclk_rate(cpu_dai, clk_id, freq);
-			if (ret < 0)
-				return ret;
-		}
+	if (sai->mclk_streams == 0 && freq > 0) {
+		ret = fsl_sai_set_mclk_rate(cpu_dai,
+					    clk_id ? clk_id : FSL_SAI_CLK_MAST1,
+					    freq);
+		if (ret < 0)
+			return ret;
 	}
 
 	ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, true);
@@ -280,7 +312,7 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
 		val_cr4 |= FSL_SAI_CR4_MF;
 
 	sai->is_pdm_mode = false;
-	sai->is_dsp_mode = false;
+	sai->is_dsp_mode[tx] = false;
 	/* DAI mode */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
@@ -309,7 +341,7 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
 		 */
 		val_cr2 |= FSL_SAI_CR2_BCP;
 		val_cr4 |= FSL_SAI_CR4_FSE;
-		sai->is_dsp_mode = true;
+		sai->is_dsp_mode[tx] = true;
 		break;
 	case SND_SOC_DAIFMT_DSP_B:
 		/*
@@ -317,7 +349,7 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
 		 * frame sync asserts with the first bit of the frame.
 		 */
 		val_cr2 |= FSL_SAI_CR2_BCP;
-		sai->is_dsp_mode = true;
+		sai->is_dsp_mode[tx] = true;
 		break;
 	case SND_SOC_DAIFMT_PDM:
 		val_cr2 |= FSL_SAI_CR2_BCP;
@@ -541,11 +573,11 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
 	u32 watermark;
 	int ret, i;
 
-	if (sai->slot_width)
-		slot_width = sai->slot_width;
+	if (sai->slot_width[tx])
+		slot_width = sai->slot_width[tx];
 
-	if (sai->slots)
-		slots = sai->slots;
+	if (sai->slots[tx])
+		slots = sai->slots[tx];
 	else if (sai->bclk_ratio)
 		slots = sai->bclk_ratio / slot_width;
 
@@ -600,7 +632,7 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
 		}
 	}
 
-	if (!sai->is_dsp_mode && !sai->is_pdm_mode)
+	if (!sai->is_dsp_mode[tx] && !sai->is_pdm_mode)
 		val_cr4 |= FSL_SAI_CR4_SYWD(slot_width);
 
 	val_cr5 |= FSL_SAI_CR5_WNW(slot_width);
@@ -932,7 +964,8 @@ static const struct snd_soc_dai_ops fsl_sai_pcm_dai_tx_ops = {
 	.set_bclk_ratio	= fsl_sai_set_dai_bclk_ratio,
 	.set_sysclk	= fsl_sai_set_dai_sysclk,
 	.set_fmt	= fsl_sai_set_dai_fmt_tx,
-	.set_tdm_slot	= fsl_sai_set_dai_tdm_slot,
+	.set_tdm_slot	= fsl_sai_set_dai_tdm_slot_tx,
+	.xlate_tdm_slot_mask = fsl_sai_xlate_tdm_slot_mask,
 	.hw_params	= fsl_sai_hw_params,
 	.hw_free	= fsl_sai_hw_free,
 	.trigger	= fsl_sai_trigger,
@@ -944,7 +977,8 @@ static const struct snd_soc_dai_ops fsl_sai_pcm_dai_rx_ops = {
 	.set_bclk_ratio	= fsl_sai_set_dai_bclk_ratio,
 	.set_sysclk	= fsl_sai_set_dai_sysclk,
 	.set_fmt	= fsl_sai_set_dai_fmt_rx,
-	.set_tdm_slot	= fsl_sai_set_dai_tdm_slot,
+	.set_tdm_slot	= fsl_sai_set_dai_tdm_slot_rx,
+	.xlate_tdm_slot_mask = fsl_sai_xlate_tdm_slot_mask,
 	.hw_params	= fsl_sai_hw_params,
 	.hw_free	= fsl_sai_hw_free,
 	.trigger	= fsl_sai_trigger,
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 0e25e2fc7ce0..6c917f79c6b0 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -286,7 +286,7 @@ struct fsl_sai {
 
 	bool is_consumer_mode[2];
 	bool is_lsb_first;
-	bool is_dsp_mode;
+	bool is_dsp_mode[2];
 	bool is_pdm_mode;
 	bool is_multi_fifo_dma;
 	bool synchronous[2];
@@ -296,8 +296,8 @@ struct fsl_sai {
 
 	unsigned int mclk_id[2];
 	unsigned int mclk_streams;
-	unsigned int slots;
-	unsigned int slot_width;
+	unsigned int slots[2];
+	unsigned int slot_width[2];
 	unsigned int bclk_ratio;
 
 	const struct fsl_sai_soc_data *soc_data;