MLK-21940-6: ASoC: imx-wm8524: Support EASRC in this sound card

Support EASRC in this sound card with FE-BE structure

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Viorel Suman <viorel.suman@nxp.com>

1 files changed, 99 insertions, 13 deletions

diff --git a/sound/soc/fsl/imx-wm8524.c b/sound/soc/fsl/imx-wm8524.c
index 59978a6a80be..a35b90e94f17 100644
--- a/sound/soc/fsl/imx-wm8524.c
+++ b/sound/soc/fsl/imx-wm8524.c
@@ -24,10 +24,14 @@
 #include <linux/mfd/syscon.h>
 
 struct imx_priv {
+	struct snd_soc_dai_link dai[3];
 	struct platform_device *pdev;
+	struct platform_device *asrc_pdev;
 	struct snd_soc_card card;
 	struct clk *codec_clk;
 	unsigned int clk_frequency;
+	u32 asrc_rate;
+	u32 asrc_format;
 };
 
 static const struct snd_soc_dapm_widget imx_wm8524_dapm_widgets[] = {
@@ -69,15 +73,35 @@ static struct snd_soc_ops imx_hifi_ops = {
 	.hw_params = imx_hifi_hw_params,
 };
 
-static struct snd_soc_dai_link imx_wm8524_dai[] = {
-	{
-		.name = "HiFi",
-		.stream_name = "HiFi",
-		.codec_dai_name = "wm8524-hifi",
-		.ops = &imx_hifi_ops,
-	},
+static const struct snd_soc_dapm_route audio_map[] = {
+	{"Playback",  NULL, "CPU-Playback"},
+	{"CPU-Capture",  NULL, "Capture"},
+	{"CPU-Playback",  NULL, "ASRC-Playback"},
+	{"ASRC-Capture",  NULL, "CPU-Capture"},
 };
 
+static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+			      struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_card *card = rtd->card;
+	struct imx_priv *priv = snd_soc_card_get_drvdata(card);
+	struct snd_interval *rate;
+	struct snd_mask *mask;
+
+	if (!priv->asrc_pdev)
+		return -EINVAL;
+
+	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	rate->max = priv->asrc_rate;
+	rate->min = priv->asrc_rate;
+
+	mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	snd_mask_none(mask);
+	snd_mask_set(mask, priv->asrc_format);
+
+	return 0;
+}
+
 static int imx_wm8524_late_probe(struct snd_soc_card *card)
 {
 	struct snd_soc_pcm_runtime *rtd = list_first_entry(
@@ -97,10 +121,13 @@ static int imx_wm8524_late_probe(struct snd_soc_card *card)
 static int imx_wm8524_probe(struct platform_device *pdev)
 {
 	struct device_node *cpu_np, *codec_np = NULL;
+	struct device_node *asrc_np = NULL;
+	struct platform_device *asrc_pdev = NULL;
 	struct platform_device *cpu_pdev;
 	struct imx_priv *priv;
 	struct platform_device *codec_pdev = NULL;
 	int ret;
+	u32 width;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -122,6 +149,12 @@ static int imx_wm8524_probe(struct platform_device *pdev)
 		goto fail;
 	}
 
+	asrc_np = of_parse_phandle(pdev->dev.of_node, "asrc-controller", 0);
+	if (asrc_np) {
+		asrc_pdev = of_find_device_by_node(asrc_np);
+		priv->asrc_pdev = asrc_pdev;
+	}
+
 	cpu_pdev = of_find_device_by_node(cpu_np);
 	if (!cpu_pdev) {
 		dev_err(&pdev->dev, "failed to find SAI platform device\n");
@@ -143,12 +176,14 @@ static int imx_wm8524_probe(struct platform_device *pdev)
 		goto fail;
 	}
 
-	priv->card.dai_link = imx_wm8524_dai;
-
-	imx_wm8524_dai[0].codec_of_node	= codec_np;
-	imx_wm8524_dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
-	imx_wm8524_dai[0].platform_of_node = cpu_np;
-	imx_wm8524_dai[0].playback_only	= 1;
+	priv->dai[0].name               = "HiFi";
+	priv->dai[0].stream_name        = "HiFi";
+	priv->dai[0].codec_dai_name     = "wm8524-hifi",
+	priv->dai[0].ops                = &imx_hifi_ops,
+	priv->dai[0].codec_of_node      = codec_np;
+	priv->dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
+	priv->dai[0].platform_of_node = cpu_np;
+	priv->dai[0].playback_only	= 1;
 
 	priv->card.late_probe = imx_wm8524_late_probe;
 	priv->card.num_links = 1;
@@ -156,6 +191,57 @@ static int imx_wm8524_probe(struct platform_device *pdev)
 	priv->card.owner = THIS_MODULE;
 	priv->card.dapm_widgets = imx_wm8524_dapm_widgets;
 	priv->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8524_dapm_widgets);
+	priv->card.dai_link = priv->dai;
+	priv->card.dapm_routes = audio_map;
+	priv->card.num_dapm_routes = 2;
+
+	/*if there is no asrc controller, we only enable one device*/
+	if (asrc_pdev) {
+		priv->dai[1].name = "HiFi-ASRC-FE";
+		priv->dai[1].stream_name = "HiFi-ASRC-FE";
+		priv->dai[1].codec_dai_name = "snd-soc-dummy-dai";
+		priv->dai[1].codec_name = "snd-soc-dummy";
+		priv->dai[1].cpu_of_node    = asrc_np;
+		priv->dai[1].platform_of_node   = asrc_np;
+		priv->dai[1].dynamic   = 1;
+		priv->dai[1].dpcm_playback  = 1;
+		priv->dai[1].dpcm_capture   = 0;
+
+		priv->dai[2].name = "HiFi-ASRC-BE";
+		priv->dai[2].stream_name = "HiFi-ASRC-BE";
+		priv->dai[2].codec_dai_name  = "wm8524-hifi";
+		priv->dai[2].codec_of_node   = codec_np;
+		priv->dai[2].cpu_of_node     = cpu_np;
+		priv->dai[2].platform_name   = "snd-soc-dummy";
+		priv->dai[2].no_pcm          = 1;
+		priv->dai[2].dpcm_playback  = 1;
+		priv->dai[2].dpcm_capture   = 0;
+		priv->dai[2].ops = &imx_hifi_ops,
+		priv->dai[2].be_hw_params_fixup = be_hw_params_fixup,
+		priv->card.num_links = 3;
+		priv->card.dai_link = &priv->dai[0];
+		priv->card.num_dapm_routes += 2;
+
+		ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
+					   &priv->asrc_rate);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get output rate\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to get output rate\n");
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		if (width == 24)
+			priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+		else
+			priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
+	}
 
 	ret = snd_soc_of_parse_card_name(&priv->card, "model");
 	if (ret)