[PATCH 3/4] ASoC: fsl_asrc: expose individual DAIs per conversion pair

[shengjiu.wang@oss.nxp.com]

From: Shengjiu Wang <shengjiu.wang@nxp.com>

The i.MX ASRC hardware supports three independent conversion pairs
(A, B, C). The driver previously registered a single DAI with generic
stream names "ASRC-Playback" and "ASRC-Capture", which prevents
individual pairs from being routed to separate audio paths simultaneously.

Replace the single fsl_asrc_dai instance with an array of three DAI
drivers, one per pair:

  paira -- ASRC-Playback / ASRC-Capture (backward compatible)
  pairb -- ASRCB-Playback / ASRCB-Capture
  pairc -- ASRCC-Playback / ASRCC-Capture

Pair A retains the original generic stream names to preserve backward
compatibility with existing machine drivers and board configurations.
Each DAI retains the same channel, rate and format capabilities as the
original. Update the devm_snd_soc_register_component() call to register
all three DAIs.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 sound/soc/fsl/fsl_asrc.c | 89 +++++++++++++++++++++++++++++++---------
 1 file changed, 69 insertions(+), 20 deletions(-)

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index 0b28bcfa47fe..f83d6cdc6412 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -803,27 +803,76 @@ static const struct snd_soc_dai_ops fsl_asrc_dai_ops = {
 				 SNDRV_PCM_FMTBIT_S16_LE | \
 				 SNDRV_PCM_FMTBIT_S24_3LE)
 
-static struct snd_soc_dai_driver fsl_asrc_dai = {
-	.playback = {
-		.stream_name = "ASRC-Playback",
-		.channels_min = 1,
-		.channels_max = 10,
-		.rate_min = 5512,
-		.rate_max = 192000,
-		.rates = SNDRV_PCM_RATE_KNOT,
-		.formats = FSL_ASRC_FORMATS |
-			   SNDRV_PCM_FMTBIT_S8,
+static struct snd_soc_dai_driver fsl_asrc_dai[] = {
+	{
+		.name = "paira",
+		.playback = {
+			.stream_name = "ASRC-Playback",
+			.channels_min = 1,
+			.channels_max = 10,
+			.rate_min = 5512,
+			.rate_max = 192000,
+			.rates = SNDRV_PCM_RATE_KNOT,
+			.formats = FSL_ASRC_FORMATS |
+				   SNDRV_PCM_FMTBIT_S8,
+		},
+		.capture = {
+			.stream_name = "ASRC-Capture",
+			.channels_min = 1,
+			.channels_max = 10,
+			.rate_min = 5512,
+			.rate_max = 192000,
+			.rates = SNDRV_PCM_RATE_KNOT,
+			.formats = FSL_ASRC_FORMATS,
+		},
+		.ops = &fsl_asrc_dai_ops,
+	},
+	{
+		.name = "pairb",
+		.playback = {
+			.stream_name = "ASRCB-Playback",
+			.channels_min = 1,
+			.channels_max = 10,
+			.rate_min = 5512,
+			.rate_max = 192000,
+			.rates = SNDRV_PCM_RATE_KNOT,
+			.formats = FSL_ASRC_FORMATS |
+				   SNDRV_PCM_FMTBIT_S8,
+		},
+		.capture = {
+			.stream_name = "ASRCB-Capture",
+			.channels_min = 1,
+			.channels_max = 10,
+			.rate_min = 5512,
+			.rate_max = 192000,
+			.rates = SNDRV_PCM_RATE_KNOT,
+			.formats = FSL_ASRC_FORMATS,
+		},
+		.ops = &fsl_asrc_dai_ops,
 	},
-	.capture = {
-		.stream_name = "ASRC-Capture",
-		.channels_min = 1,
-		.channels_max = 10,
-		.rate_min = 5512,
-		.rate_max = 192000,
-		.rates = SNDRV_PCM_RATE_KNOT,
-		.formats = FSL_ASRC_FORMATS,
+	{
+		.name = "pairc",
+		.playback = {
+			.stream_name = "ASRCC-Playback",
+			.channels_min = 1,
+			.channels_max = 10,
+			.rate_min = 5512,
+			.rate_max = 192000,
+			.rates = SNDRV_PCM_RATE_KNOT,
+			.formats = FSL_ASRC_FORMATS |
+				   SNDRV_PCM_FMTBIT_S8,
+		},
+		.capture = {
+			.stream_name = "ASRCC-Capture",
+			.channels_min = 1,
+			.channels_max = 10,
+			.rate_min = 5512,
+			.rate_max = 192000,
+			.rates = SNDRV_PCM_RATE_KNOT,
+			.formats = FSL_ASRC_FORMATS,
+		},
+		.ops = &fsl_asrc_dai_ops,
 	},
-	.ops = &fsl_asrc_dai_ops,
 };
 
 static bool fsl_asrc_readable_reg(struct device *dev, unsigned int reg)
@@ -1404,7 +1453,7 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 		goto err_pm_get_sync;
 
 	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_asrc_component,
-					      &fsl_asrc_dai, 1);
+					      fsl_asrc_dai, ARRAY_SIZE(fsl_asrc_dai));
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register ASoC DAI\n");
 		goto err_pm_get_sync;
-- 
2.34.1