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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/sound/soc/qcom/common.c
..
..
@@ -14,9 +14,13 @@
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 	struct device *dev = card->dev;
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 	struct snd_soc_dai_link *link;
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 	struct of_phandle_args args;
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+	struct snd_soc_dai_link_component *dlc;
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 	int ret, num_links;
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19
 
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 	ret = snd_soc_of_parse_card_name(card, "model");
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+	if (ret == 0 && !card->name)
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+		/* Deprecated, only for compatibility with old device trees */
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+		ret = snd_soc_of_parse_card_name(card, "qcom,model");
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 	if (ret) {
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 		dev_err(dev, "Error parsing card name: %d\n", ret);
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 		return ret;
..
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@@ -24,29 +28,57 @@
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28
 
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 	/* DAPM routes */
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 	if (of_property_read_bool(dev->of_node, "audio-routing")) {
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-		ret = snd_soc_of_parse_audio_routing(card,
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-				"audio-routing");
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+		ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
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 		if (ret)
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 			return ret;
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 	}
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+	/* Deprecated, only for compatibility with old device trees */
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+	if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) {
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+		ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing");
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+		if (ret)
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+			return ret;
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+	}
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+
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+	ret = snd_soc_of_parse_aux_devs(card, "aux-devs");
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+	if (ret)
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+		return ret;
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45
 
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 	/* Populate links */
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 	num_links = of_get_child_count(dev->of_node);
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48
 
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 	/* Allocate the DAI link array */
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-	card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
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+	card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL);
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 	if (!card->dai_link)
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 		return -ENOMEM;
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 	card->num_links = num_links;
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 	link = card->dai_link;
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+
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 	for_each_child_of_node(dev->of_node, np) {
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+		dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
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+		if (!dlc) {
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+			ret = -ENOMEM;
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+			goto err_put_np;
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+		}
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+
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+		link->cpus	= &dlc[0];
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+		link->platforms	= &dlc[1];
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+
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+		link->num_cpus		= 1;
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+		link->num_platforms	= 1;
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+
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+		ret = of_property_read_string(np, "link-name", &link->name);
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+		if (ret) {
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+			dev_err(card->dev, "error getting codec dai_link name\n");
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+			goto err_put_np;
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+		}
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+
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 		cpu = of_get_child_by_name(np, "cpu");
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 		platform = of_get_child_by_name(np, "platform");
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 		codec = of_get_child_by_name(np, "codec");
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 		if (!cpu) {
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-			dev_err(dev, "Can't find cpu DT node\n");
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+			dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
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 			ret = -EINVAL;
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 			goto err;
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 		}
..
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@@ -54,51 +86,70 @@
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 		ret = of_parse_phandle_with_args(cpu, "sound-dai",
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 					"#sound-dai-cells", 0, &args);
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 		if (ret) {
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-			dev_err(card->dev, "error getting cpu phandle\n");
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+			dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
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 			goto err;
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 		}
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-		link->cpu_of_node = args.np;
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+		link->cpus->of_node = args.np;
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 		link->id = args.args[0];
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-		ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
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+		ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
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 		if (ret) {
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-			dev_err(card->dev, "error getting cpu dai name\n");
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+			if (ret != -EPROBE_DEFER)
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+				dev_err(card->dev, "%s: error getting cpu dai name: %d\n",
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+					link->name, ret);
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 			goto err;
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 		}
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-		if (codec && platform) {
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-			link->platform_of_node = of_parse_phandle(platform,
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+		if (platform) {
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+			link->platforms->of_node = of_parse_phandle(platform,
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 					"sound-dai",
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 					0);
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-			if (!link->platform_of_node) {
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-				dev_err(card->dev, "platform dai not found\n");
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+			if (!link->platforms->of_node) {
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+				dev_err(card->dev, "%s: platform dai not found\n", link->name);
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 				ret = -EINVAL;
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 				goto err;
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 			}
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+		} else {
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+			link->platforms->of_node = link->cpus->of_node;
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+		}
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+		if (codec) {
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 			ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
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 			if (ret < 0) {
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-				dev_err(card->dev, "codec dai not found\n");
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+				if (ret != -EPROBE_DEFER)
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+					dev_err(card->dev, "%s: codec dai not found: %d\n",
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+						link->name, ret);
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 				goto err;
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 			}
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-			link->no_pcm = 1;
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-			link->ignore_pmdown_time = 1;
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+
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+			if (platform) {
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+				/* DPCM backend */
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+				link->no_pcm = 1;
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+				link->ignore_pmdown_time = 1;
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+			}
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 		} else {
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-			link->platform_of_node = link->cpu_of_node;
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-			link->codec_dai_name = "snd-soc-dummy-dai";
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-			link->codec_name = "snd-soc-dummy";
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+			/* DPCM frontend */
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+			dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
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+			if (!dlc) {
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+				ret = -ENOMEM;
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+				goto err;
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+			}
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+
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+			link->codecs	 = dlc;
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+			link->num_codecs = 1;
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+
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+			link->codecs->dai_name = "snd-soc-dummy-dai";
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+			link->codecs->name = "snd-soc-dummy";
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 			link->dynamic = 1;
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 		}
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-		link->ignore_suspend = 1;
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-		ret = of_property_read_string(np, "link-name", &link->name);
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-		if (ret) {
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-			dev_err(card->dev, "error getting codec dai_link name\n");
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-			goto err;
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+		if (platform || !codec) {
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+			/* DPCM */
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+			snd_soc_dai_link_set_capabilities(link);
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+			link->ignore_suspend = 1;
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+			link->nonatomic = 1;
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 		}
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-		link->dpcm_playback = 1;
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-		link->dpcm_capture = 1;
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 		link->stream_name = link->name;
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 		link++;
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..
..
@@ -109,11 +160,11 @@
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 	return 0;
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 err:
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-	of_node_put(np);
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 	of_node_put(cpu);
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 	of_node_put(codec);
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 	of_node_put(platform);
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-	kfree(card->dai_link);
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+err_put_np:
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+	of_node_put(np);
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 	return ret;
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 }
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 EXPORT_SYMBOL(qcom_snd_parse_of);