ASoC: fsl_asrc: Support new property fsl,asrc-format

In order to align with new ESARC, we add new property fsl,asrc-format.
The fsl,asrc-format can replace the fsl,asrc-width, driver
can accept format from devicetree, don't need to convert it to
format through width.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/2be9664768f32982ba4f71e49749f7390096ac9f.1587038908.git.shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_asrc.c

@@ -589,7 +589,6 @@ static int fsl_asrc_dai_hw_params(struct snd_pcm_substream *substream,
 	unsigned int channels = params_channels(params);
 	unsigned int rate = params_rate(params);
 	struct asrc_config config;
-	snd_pcm_format_t format;
 	int ret;
 
 	ret = fsl_asrc_request_pair(channels, pair);
@@ -600,11 +599,6 @@ static int fsl_asrc_dai_hw_params(struct snd_pcm_substream *substream,
 
 	pair->config = &config;
 
-	if (asrc->asrc_width == 16)
-		format = SNDRV_PCM_FORMAT_S16_LE;
-	else
-		format = SNDRV_PCM_FORMAT_S24_LE;
-
 	config.pair = pair->index;
 	config.channel_num = channels;
 	config.inclk = INCLK_NONE;
@@ -612,11 +606,11 @@ static int fsl_asrc_dai_hw_params(struct snd_pcm_substream *substream,
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		config.input_format   = params_format(params);
-		config.output_format  = format;
+		config.output_format  = asrc->asrc_format;
 		config.input_sample_rate  = rate;
 		config.output_sample_rate = asrc->asrc_rate;
 	} else {
-		config.input_format   = format;
+		config.input_format   = asrc->asrc_format;
 		config.output_format  = params_format(params);
 		config.input_sample_rate  = asrc->asrc_rate;
 		config.output_sample_rate = rate;
@@ -946,6 +940,7 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 	int irq, ret, i;
 	u32 map_idx;
 	char tmp[16];
+	u32 width;
 
 	asrc = devm_kzalloc(&pdev->dev, sizeof(*asrc), GFP_KERNEL);
 	if (!asrc)
@@ -1052,16 +1047,32 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = of_property_read_u32(np, "fsl,asrc-width",
-				   &asrc->asrc_width);
+	ret = of_property_read_u32(np, "fsl,asrc-format", &asrc->asrc_format);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to get output width\n");
-		return ret;
+		ret = of_property_read_u32(np, "fsl,asrc-width", &width);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to decide output format\n");
+			return ret;
+		}
+
+		switch (width) {
+		case 16:
+			asrc->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
+			break;
+		case 24:
+			asrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+			break;
+		default:
+			dev_warn(&pdev->dev,
+				 "unsupported width, use default S24_LE\n");
+			asrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+			break;
+		}
 	}
 
-	if (asrc->asrc_width != 16 && asrc->asrc_width != 24) {
-		dev_warn(&pdev->dev, "unsupported width, switching to 24bit\n");
-		asrc->asrc_width = 24;
+	if (!(FSL_ASRC_FORMATS & (1ULL << asrc->asrc_format))) {
+		dev_warn(&pdev->dev, "unsupported width, use default S24_LE\n");
+		asrc->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
 	}
 
 	platform_set_drvdata(pdev, asrc);

sound/soc/fsl/fsl_asrc.h

@@ -493,7 +493,7 @@ struct fsl_asrc_pair {
  * @channel_avail: non-occupied channel numbers
  * @clk_map: clock map for input/output clock
  * @asrc_rate: default sample rate for ASoC Back-Ends
- * @asrc_width: default sample width for ASoC Back-Ends
+ * @asrc_format: default sample format for ASoC Back-Ends
  * @regcache_cfg: store register value of REG_ASRCFG
  */
 struct fsl_asrc {
@@ -514,7 +514,7 @@ struct fsl_asrc {
 	unsigned char *clk_map[2];
 
 	int asrc_rate;
-	int asrc_width;
+	snd_pcm_format_t asrc_format;
 
 	u32 regcache_cfg;
 };

sound/soc/fsl/fsl_asrc_dma.c

@@ -146,7 +146,7 @@ static int fsl_asrc_dma_hw_params(struct snd_soc_component *component,
 	struct device *dev_be;
 	u8 dir = tx ? OUT : IN;
 	dma_cap_mask_t mask;
-	int ret;
+	int ret, width;
 
 	/* Fetch the Back-End dma_data from DPCM */
 	for_each_dpcm_be(rtd, stream, dpcm) {
@@ -230,10 +230,19 @@ static int fsl_asrc_dma_hw_params(struct snd_soc_component *component,
 		return -EINVAL;
 	}
 
-	if (asrc->asrc_width == 16)
+	width = snd_pcm_format_physical_width(asrc->asrc_format);
+	if (width < 8 || width > 64)
+		return -EINVAL;
+	else if (width == 8)
+		buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
+	else if (width == 16)
 		buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
-	else
+	else if (width == 24)
+		buswidth = DMA_SLAVE_BUSWIDTH_3_BYTES;
+	else if (width <= 32)
 		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	else
+		buswidth = DMA_SLAVE_BUSWIDTH_8_BYTES;
 
 	config_be.direction = DMA_DEV_TO_DEV;
 	config_be.src_addr_width = buswidth;