ASoC: hdac_hdmi: create dais based on number of cvts

After enabling all pins/cvts, Skylake HDMI codec enumerates 3
converters.  Three independent streams can be supported with 3
cvts. This patch removes the static dai creation and creates dais
based on the number of cvts queried.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/hdac_hdmi.c

@@ -30,6 +30,8 @@
 #include <sound/pcm_drm_eld.h>
 #include "../../hda/local.h"
 
+#define NAME_SIZE	32
+
 #define AMP_OUT_MUTE		0xb080
 #define AMP_OUT_UNMUTE		0xb000
 #define PIN_OUT			(AC_PINCTL_OUT_EN)
@@ -669,11 +671,82 @@ static void hdac_hdmi_skl_enable_dp12(struct hdac_device *hdac)
 
 }
 
+static struct snd_soc_dai_ops hdmi_dai_ops = {
+	.startup = hdac_hdmi_pcm_open,
+	.shutdown = hdac_hdmi_pcm_close,
+	.hw_params = hdac_hdmi_set_hw_params,
+	.prepare = hdac_hdmi_playback_prepare,
+	.hw_free = hdac_hdmi_playback_cleanup,
+};
+
+/*
+ * Each converter can support a stream independently. So a dai is created
+ * based on the number of converter queried.
+ */
+static int hdac_hdmi_create_dais(struct hdac_device *hdac,
+		struct snd_soc_dai_driver **dais,
+		struct hdac_hdmi_priv *hdmi, int num_dais)
+{
+	struct snd_soc_dai_driver *hdmi_dais;
+	struct hdac_hdmi_cvt *cvt;
+	char name[NAME_SIZE], dai_name[NAME_SIZE];
+	int i = 0;
+	u32 rates, bps;
+	unsigned int rate_max = 384000, rate_min = 8000;
+	u64 formats;
+	int ret;
+
+	hdmi_dais = devm_kzalloc(&hdac->dev,
+			(sizeof(*hdmi_dais) * num_dais),
+			GFP_KERNEL);
+	if (!hdmi_dais)
+		return -ENOMEM;
+
+	list_for_each_entry(cvt, &hdmi->cvt_list, head) {
+		ret = snd_hdac_query_supported_pcm(hdac, cvt->nid,
+					&rates,	&formats, &bps);
+		if (ret)
+			return ret;
+
+		sprintf(dai_name, "intel-hdmi-hifi%d", i+1);
+		hdmi_dais[i].name = devm_kstrdup(&hdac->dev,
+					dai_name, GFP_KERNEL);
+
+		if (!hdmi_dais[i].name)
+			return -ENOMEM;
+
+		snprintf(name, sizeof(name), "hifi%d", i+1);
+		hdmi_dais[i].playback.stream_name =
+				devm_kstrdup(&hdac->dev, name, GFP_KERNEL);
+		if (!hdmi_dais[i].playback.stream_name)
+			return -ENOMEM;
+
+		/*
+		 * Set caps based on capability queried from the converter.
+		 * It will be constrained runtime based on ELD queried.
+		 */
+		hdmi_dais[i].playback.formats = formats;
+		hdmi_dais[i].playback.rates = rates;
+		hdmi_dais[i].playback.rate_max = rate_max;
+		hdmi_dais[i].playback.rate_min = rate_min;
+		hdmi_dais[i].playback.channels_min = 2;
+		hdmi_dais[i].playback.channels_max = 2;
+		hdmi_dais[i].ops = &hdmi_dai_ops;
+
+		i++;
+	}
+
+	*dais = hdmi_dais;
+
+	return 0;
+}
+
 /*
  * Parse all nodes and store the cvt/pin nids in array
  * Add one time initialization for pin and cvt widgets
  */
-static int hdac_hdmi_parse_and_map_nid(struct hdac_ext_device *edev)
+static int hdac_hdmi_parse_and_map_nid(struct hdac_ext_device *edev,
+		struct snd_soc_dai_driver **dais, int *num_dais)
 {
 	hda_nid_t nid;
 	int i, num_nodes;
@@ -724,6 +797,15 @@ static int hdac_hdmi_parse_and_map_nid(struct hdac_ext_device *edev)
 	if (!hdmi->num_pin || !hdmi->num_cvt)
 		return -EIO;
 
+	ret = hdac_hdmi_create_dais(hdac, dais, hdmi, hdmi->num_cvt);
+	if (ret) {
+		dev_err(&hdac->dev, "Failed to create dais with err: %d\n",
+							ret);
+		return ret;
+	}
+
+	*num_dais = hdmi->num_cvt;
+
 	return hdac_hdmi_init_dai_map(edev);
 }
 
@@ -814,38 +896,12 @@ static struct snd_soc_codec_driver hdmi_hda_codec = {
 	.idle_bias_off	= true,
 };
 
-static struct snd_soc_dai_ops hdmi_dai_ops = {
-	.startup = hdac_hdmi_pcm_open,
-	.shutdown = hdac_hdmi_pcm_close,
-	.hw_params = hdac_hdmi_set_hw_params,
-	.prepare = hdac_hdmi_playback_prepare,
-	.hw_free = hdac_hdmi_playback_cleanup,
-};
-
-static struct snd_soc_dai_driver hdmi_dais[] = {
-	{	.name = "intel-hdmi-hif1",
-		.playback = {
-			.stream_name = "hif1",
-			.channels_min = 2,
-			.channels_max = 2,
-			.rates = SNDRV_PCM_RATE_32000 |
-				SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
-				SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
-				SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
-			.formats = SNDRV_PCM_FMTBIT_S16_LE |
-				SNDRV_PCM_FMTBIT_S20_3LE |
-				SNDRV_PCM_FMTBIT_S24_LE |
-				SNDRV_PCM_FMTBIT_S32_LE,
-
-		},
-		.ops = &hdmi_dai_ops,
-	},
-};
-
 static int hdac_hdmi_dev_probe(struct hdac_ext_device *edev)
 {
 	struct hdac_device *codec = &edev->hdac;
 	struct hdac_hdmi_priv *hdmi_priv;
+	struct snd_soc_dai_driver *hdmi_dais = NULL;
+	int num_dais = 0;
 	int ret = 0;
 
 	hdmi_priv = devm_kzalloc(&codec->dev, sizeof(*hdmi_priv), GFP_KERNEL);
@@ -859,13 +915,16 @@ static int hdac_hdmi_dev_probe(struct hdac_ext_device *edev)
 	INIT_LIST_HEAD(&hdmi_priv->pin_list);
 	INIT_LIST_HEAD(&hdmi_priv->cvt_list);
 
-	ret = hdac_hdmi_parse_and_map_nid(edev);
+	ret = hdac_hdmi_parse_and_map_nid(edev, &hdmi_dais, &num_dais);
-	if (ret < 0)
+	if (ret < 0) {
+		dev_err(&codec->dev,
+			"Failed in parse and map nid with err: %d\n", ret);
 		return ret;
+	}
 
 	/* ASoC specific initialization */
 	return snd_soc_register_codec(&codec->dev, &hdmi_hda_codec,
-			hdmi_dais, ARRAY_SIZE(hdmi_dais));
+			hdmi_dais, num_dais);
 }
 
 static int hdac_hdmi_dev_remove(struct hdac_ext_device *edev)