[PATCH v3 4/5] ASoC: fsl_asrc: expose individual DAIs per conversion path

From: Shengjiu Wang <[email protected]>

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
multiple independent conversion paths from being used simultaneously.

Replace the single fsl_asrc_dai instance with an array of three DAI
drivers to allow up to three independent conversion paths to be active
at the same time:

  asrc-0 -- ASRC-Playback / ASRC-Capture (backward compatible)
  asrc-1 -- ASRC1-Playback / ASRC1-Capture
  asrc-2 -- ASRC2-Playback / ASRC2-Capture

asrc-0 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 <[email protected]>
---
 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 2755ee57c6a1..a5d6c4c1e929 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -792,27 +792,76 @@ 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 = "asrc-0",
+		.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 = "asrc-1",
+		.playback = {
+			.stream_name = "ASRC1-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 = "ASRC1-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 = "asrc-2",
+		.playback = {
+			.stream_name = "ASRC2-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 = "ASRC2-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)
@@ -1393,7 +1442,7 @@ 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