Revert "Revert "ASoC: tegra: Single cpu multi codec dai support""

This reverts commit 43ae0060cd.

Reason for revert: Fixed the build issue on sidecar branch

Bug 3772918

Change-Id: Ib02496f93fe79aec04f3b5b1c78a5681b1e56819
Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2819603
Reviewed-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-by: Sharad Gupta <sharadg@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

sound/soc/tegra/tegra186_dspk.c

@@ -446,38 +446,6 @@ static struct snd_soc_dai_driver tegra186_dspk_dais[] = {
 	    .ops = &tegra186_dspk_dai_ops,
 	    .symmetric_rate = 1,
 	},
-	/* The second DAI is used when the output of the DSPK is connected
-	 * to two mono codecs. When the output of the DSPK is connected to
-	 * a single stereo codec, then only the first DAI should be used.
-	 */
-	{
-	    .name = "CIF2",
-	    .playback = {
-		.stream_name = "CIF2-Playback",
-		.channels_min = 1,
-		.channels_max = 2,
-		.rates = SNDRV_PCM_RATE_8000_48000,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE |
-			   SNDRV_PCM_FMTBIT_S32_LE,
-	    },
-	},
-	{
-	    .name = "DAP2",
-#if IS_ENABLED(CONFIG_TEGRA_DPCM)
-	    .playback = {
-		.stream_name = "DAP2-Playback",
-#else
-	    .capture = {
-		.stream_name = "DAP2-Capture",
-#endif
-		.channels_min = 1,
-		.channels_max = 2,
-		.rates = SNDRV_PCM_RATE_8000_48000,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE |
-			   SNDRV_PCM_FMTBIT_S32_LE,
-	    },
-	    .symmetric_rate = 1,
-	},
 	{
 	    .name = "DUMMY_SINK",
 	    .playback = {
@@ -493,7 +461,6 @@ static struct snd_soc_dai_driver tegra186_dspk_dais[] = {
 
 static const struct snd_soc_dapm_widget tegra186_dspk_widgets[] = {
 	SND_SOC_DAPM_AIF_IN("RX", NULL, 0, TEGRA186_DSPK_ENABLE, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("DAP2 TX", NULL, 0, 0, 0, 0),
 	SND_SOC_DAPM_SPK("SPK", NULL),
 };
 
@@ -507,8 +474,6 @@ static const struct snd_soc_dapm_route tegra186_dspk_routes[] = {
 #else
 	{ "RX",			NULL, "CIF-Playback" },
 	{ "DAP-Capture",	NULL, "RX" },
-	{ "DAP2 TX",		NULL, "CIF2-Playback" },
-	{ "DAP2-Capture",	NULL, "DAP2 TX" },
 	{ "SPK",		NULL, "Dummy-Playback" },
 #endif
 };

sound/soc/tegra/tegra_asoc_machine.c

@@ -97,7 +97,35 @@ static int get_num_dai_links(struct platform_device *pdev,
 			     unsigned int *num_links)
 {
 	struct device_node *top = pdev->dev.of_node;
-	struct device_node *link_node, *codec;
+	struct device_node *link_node;
+	unsigned int link_count = 0;
+
+	link_node = of_get_child_by_name(top, PREFIX "dai-link");
+	if (!link_node) {
+		dev_err(&pdev->dev, "no dai links found\n");
+		return -ENOENT;
+	}
+
+	do {
+		if (!of_dai_link_is_available(link_node)) {
+			link_node = of_get_next_child(top, link_node);
+			continue;
+		}
+
+		link_count++;
+		link_node = of_get_next_child(top, link_node);
+	} while (link_node);
+
+	*num_links = link_count;
+
+	return 0;
+}
+
+static int allocate_link_dais(struct platform_device *pdev,
+			struct snd_soc_dai_link *dai_links)
+{
+	struct device_node *top = pdev->dev.of_node;
+	struct device_node *link_node;
 	unsigned int link_count = 0, num_codecs;
 
 	link_node = of_get_child_by_name(top, PREFIX "dai-link");
@@ -112,12 +140,12 @@ static int get_num_dai_links(struct platform_device *pdev,
 			continue;
 		}
 
-		/*
-		 * depending on the number of codec subnodes, DAI link
-		 * count is incremented. DT can have one DAI link entry
-		 * with multiple codec nodes(for ex: DSPK), driver can
-		 * create multiple links out of it.
-		 */
+		dai_links[link_count].cpus = devm_kzalloc(&pdev->dev,
+						 sizeof(*dai_links[link_count].cpus),
+						 GFP_KERNEL);
+		if (!dai_links[link_count].cpus)
+			return -ENOMEM;
+
 		num_codecs = of_get_child_count_with_name(link_node,
 							 "codec");
 		if (!num_codecs) {
@@ -127,19 +155,28 @@ static int get_num_dai_links(struct platform_device *pdev,
 			return -EINVAL;
 		}
 
-		for_each_child_of_node(link_node, codec) {
-			if (of_node_cmp(codec->name, "codec"))
-				continue;
+		dai_links[link_count].codecs =
+			devm_kzalloc(&pdev->dev,
+			sizeof(*dai_links[link_count].codecs) * num_codecs,
+			GFP_KERNEL);
+		if (!dai_links[link_count].codecs)
+			return -ENOMEM;
+
+		dai_links[link_count].platforms = devm_kzalloc(&pdev->dev,
+						   sizeof(*dai_links[link_count].platforms),
+						   GFP_KERNEL);
+		if (!dai_links[link_count].platforms)
+			return -ENOMEM;
+
+		dai_links[link_count].num_cpus = 1;
+		dai_links[link_count].num_codecs = num_codecs;
+		dai_links[link_count].num_platforms = 1;
 
-			if (of_property_read_bool(codec, DAI))
 		link_count++;
-		}
 
 		link_node = of_get_next_child(top, link_node);
 	} while (link_node);
 
-	*num_links = link_count;
-
 	return 0;
 }
 
@@ -372,7 +409,7 @@ static int parse_dt_dai_links(struct snd_soc_card *card,
 	struct device_node *top = pdev->dev.of_node;
 	struct device_node *link_node;
 	struct snd_soc_dai_link *dai_links;
-	unsigned int num_links, link_count = 0, i;
+	unsigned int num_links, link_count = 0;
 	int ret;
 
 	ret = get_num_dai_links(pdev, &machine->asoc->num_links);
@@ -388,29 +425,9 @@ static int parse_dt_dai_links(struct snd_soc_card *card,
 	if (!dai_links)
 		return -ENOMEM;
 
-	for (i = 0; i < num_links; i++) {
-		dai_links[i].cpus = devm_kzalloc(&pdev->dev,
-						 sizeof(*dai_links[i].cpus),
-						 GFP_KERNEL);
-		if (!dai_links[i].cpus)
-			return -ENOMEM;
-
-		dai_links[i].codecs = devm_kzalloc(&pdev->dev,
-						   sizeof(*dai_links[i].codecs),
-						   GFP_KERNEL);
-		if (!dai_links[i].codecs)
-			return -ENOMEM;
-
-		dai_links[i].platforms = devm_kzalloc(&pdev->dev,
-						   sizeof(*dai_links[i].platforms),
-						   GFP_KERNEL);
-		if (!dai_links[i].platforms)
-			return -ENOMEM;
-
-		dai_links[i].num_cpus = 1;
-		dai_links[i].num_codecs = 1;
-		dai_links[i].num_platforms = 1;
-	}
+	ret = allocate_link_dais(pdev, dai_links);
+	if (ret < 0)
+		return ret;
 
 	machine->asoc->dai_links = dai_links;
 
@@ -433,6 +450,7 @@ static int parse_dt_dai_links(struct snd_soc_card *card,
 
 		dev_dbg(&pdev->dev, "parsing (%pOF)\n", link_node);
 
+		dai_link = &dai_links[link_count];
 		cpu = of_get_child_by_name(link_node, "cpu");
 		if (!cpu) {
 			dev_err(&pdev->dev, "cpu subnode is missing");
@@ -440,6 +458,11 @@ static int parse_dt_dai_links(struct snd_soc_card *card,
 			goto cleanup;
 		}
 
+		/* parse CPU DAI */
+		ret = parse_dai(cpu, dai_link->cpus);
+		if (ret < 0)
+			goto cleanup;
+
 		for_each_child_of_node(link_node, codec) {
 			/* loop over codecs only */
 			if (of_node_cmp(codec->name, "codec"))
@@ -453,22 +476,17 @@ static int parse_dt_dai_links(struct snd_soc_card *card,
 				continue;
 			}
 
-			dai_link = &dai_links[link_count];
-
-			/* parse CPU DAI */
-			ret = parse_dai(cpu, dai_link->cpus);
-			if (ret < 0)
-				goto cleanup;
-
 			/* parse CODEC DAI */
-			ret = parse_dai(codec, dai_link->codecs);
+			ret = parse_dai(codec, &dai_link->codecs[codec_count]);
 			if (ret < 0)
 				goto cleanup;
 
+			codec_count++;
+		}
+
 		/* set DAI link name */
-			if (of_property_read_string_index(link_node,
+		if (of_property_read_string(link_node,
 					    "link-name",
-							  codec_count,
 					    &dai_link->name)) {
 			ret = asoc_simple_set_dailink_name(
 				&pdev->dev, dai_link, "%s-%d",
@@ -529,8 +547,7 @@ static int parse_dt_dai_links(struct snd_soc_card *card,
 		}
 
 		link_count++;
-			codec_count++;
-		}
+
 cleanup:
 		of_node_put(cpu);
 		if (ret < 0) {

sound/soc/tegra/tegra_codecs.c

@@ -185,7 +185,7 @@ int tegra_codecs_runtime_setup(struct snd_soc_card *card,
 			       unsigned int aud_mclk)
 {
 	struct snd_soc_pcm_runtime *rtd;
-	int err;
+	int i, err;
 
 	rtd = get_pcm_runtime(card, "rt565x-playback");
 	if (rtd) {
@@ -231,32 +231,23 @@ int tegra_codecs_runtime_setup(struct snd_soc_card *card,
 		}
 	}
 
-	rtd = get_pcm_runtime(card, "dspk-playback-r");
+	rtd = get_pcm_runtime(card, "dspk-playback-dual-tas2552");
 	if (rtd) {
-		if (!strcmp(rtd->dais[rtd->dai_link->num_cpus]->name, "tas2552-amplifier")) {
-			err = snd_soc_dai_set_sysclk(rtd->dais[rtd->dai_link->num_cpus],
+		for (i = 0; i < rtd->num_codecs; i++) {
+			if (!strcmp(rtd->dais[rtd->num_cpus + i]->name,
+							"tas2552-amplifier")) {
+				err = snd_soc_dai_set_sysclk(
+					rtd->dais[rtd->num_cpus + i],
 					TAS2552_PDM_CLK_IVCLKIN, aud_mclk,
 					SND_SOC_CLOCK_IN);
 				if (err < 0) {
-				dev_err(card->dev, "dais[%d] clock not set\n",
-					rtd->dai_link->num_cpus);
+					dev_err(card->dev,
+						"dais[%d] clock not set\n",
+						rtd->num_cpus + i);
 					return err;
 				}
 			}
 		}
-
-	rtd = get_pcm_runtime(card, "dspk-playback-l");
-	if (rtd) {
-		if (!strcmp(rtd->dais[rtd->dai_link->num_cpus]->name, "tas2552-amplifier")) {
-			err = snd_soc_dai_set_sysclk(rtd->dais[rtd->dai_link->num_cpus],
-				TAS2552_PDM_CLK_IVCLKIN, aud_mclk,
-				SND_SOC_CLOCK_IN);
-			if (err < 0) {
-				dev_err(card->dev, "dais[%d] clock not set\n",
-					rtd->dai_link->num_cpus);
-				return err;
-			}
-		}
 	}
 
 	return 0;