ASoC: rockchip_max98090: Optionally support HDMI use case

Support three different use cases with rockchip_max98090 driver.

The three use cases:
- max98090 only: Current usage, where HDMI link is missing.
- HDMI only: Needed use case for veyron_mickey board.
- max98090 + HDMI: Ideal use case for veyron_jerry, veyron_minnie..etc.

The presence of max98090 is determined by the presence of
rockchip,audio-codec device property.

The presence of HDMI is determined by the presence of
rockchip,hdmi-codec device property.

Create different sound card based on the configuration.
Note that we keep max98090 only usage for backward compatibility.
Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Link: https://lore.kernel.org/r/20191028071930.145899-4-cychiang@chromium.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/rockchip/rockchip_max98090.c

@@ -6,6 +6,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
@@ -36,28 +37,73 @@ static struct snd_soc_jack_pin headset_jack_pins[] = {
 
 };
 
-static const struct snd_soc_dapm_widget rk_dapm_widgets[] = {
-	SND_SOC_DAPM_HP("Headphone", NULL),
-	SND_SOC_DAPM_MIC("Headset Mic", NULL),
-	SND_SOC_DAPM_MIC("Int Mic", NULL),
-	SND_SOC_DAPM_SPK("Speaker", NULL),
+#define RK_MAX98090_WIDGETS \
+	SND_SOC_DAPM_HP("Headphone", NULL), \
+	SND_SOC_DAPM_MIC("Headset Mic", NULL), \
+	SND_SOC_DAPM_MIC("Int Mic", NULL), \
+	SND_SOC_DAPM_SPK("Speaker", NULL)
+
+#define RK_HDMI_WIDGETS \
+	SND_SOC_DAPM_LINE("HDMI", NULL)
+
+static const struct snd_soc_dapm_widget rk_max98090_dapm_widgets[] = {
+	RK_MAX98090_WIDGETS,
+};
+
+static const struct snd_soc_dapm_widget rk_hdmi_dapm_widgets[] = {
+	RK_HDMI_WIDGETS,
+};
+
+static const struct snd_soc_dapm_widget rk_max98090_hdmi_dapm_widgets[] = {
+	RK_MAX98090_WIDGETS,
+	RK_HDMI_WIDGETS,
+};
+
+#define RK_MAX98090_AUDIO_MAP \
+	{"IN34", NULL, "Headset Mic"}, \
+	{"Headset Mic", NULL, "MICBIAS"}, \
+	{"DMICL", NULL, "Int Mic"}, \
+	{"Headphone", NULL, "HPL"}, \
+	{"Headphone", NULL, "HPR"}, \
+	{"Speaker", NULL, "SPKL"}, \
+	{"Speaker", NULL, "SPKR"}
+
+#define RK_HDMI_AUDIO_MAP \
+	{"HDMI", NULL, "TX"}
+
+static const struct snd_soc_dapm_route rk_max98090_audio_map[] = {
+	RK_MAX98090_AUDIO_MAP,
 };
 
-static const struct snd_soc_dapm_route rk_audio_map[] = {
-	{"IN34", NULL, "Headset Mic"},
-	{"Headset Mic", NULL, "MICBIAS"},
-	{"DMICL", NULL, "Int Mic"},
-	{"Headphone", NULL, "HPL"},
-	{"Headphone", NULL, "HPR"},
-	{"Speaker", NULL, "SPKL"},
-	{"Speaker", NULL, "SPKR"},
+static const struct snd_soc_dapm_route rk_hdmi_audio_map[] = {
+	RK_HDMI_AUDIO_MAP,
 };
 
-static const struct snd_kcontrol_new rk_mc_controls[] = {
-	SOC_DAPM_PIN_SWITCH("Headphone"),
-	SOC_DAPM_PIN_SWITCH("Headset Mic"),
-	SOC_DAPM_PIN_SWITCH("Int Mic"),
-	SOC_DAPM_PIN_SWITCH("Speaker"),
+static const struct snd_soc_dapm_route rk_max98090_hdmi_audio_map[] = {
+	RK_MAX98090_AUDIO_MAP,
+	RK_HDMI_AUDIO_MAP,
+};
+
+#define RK_MAX98090_CONTROLS \
+	SOC_DAPM_PIN_SWITCH("Headphone"), \
+	SOC_DAPM_PIN_SWITCH("Headset Mic"), \
+	SOC_DAPM_PIN_SWITCH("Int Mic"), \
+	SOC_DAPM_PIN_SWITCH("Speaker")
+
+#define RK_HDMI_CONTROLS \
+	SOC_DAPM_PIN_SWITCH("HDMI")
+
+static const struct snd_kcontrol_new rk_max98090_controls[] = {
+	RK_MAX98090_CONTROLS,
+};
+
+static const struct snd_kcontrol_new rk_hdmi_controls[] = {
+	RK_HDMI_CONTROLS,
+};
+
+static const struct snd_kcontrol_new rk_max98090_hdmi_controls[] = {
+	RK_MAX98090_CONTROLS,
+	RK_HDMI_CONTROLS,
 };
 
 static int rk_jack_event(struct notifier_block *nb, unsigned long event,
@@ -122,15 +168,20 @@ static int rk_aif1_hw_params(struct snd_pcm_substream *substream,
 
 	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
 				     SND_SOC_CLOCK_OUT);
-	if (ret < 0) {
-		dev_err(codec_dai->dev, "Can't set codec clock %d\n", ret);
+	if (ret) {
+		dev_err(cpu_dai->dev, "Can't set cpu dai clock %d\n", ret);
 		return ret;
 	}
 
 	ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 				     SND_SOC_CLOCK_IN);
-	if (ret < 0) {
-		dev_err(codec_dai->dev, "Can't set codec clock %d\n", ret);
+
+	/* HDMI codec dai does not need to set sysclk. */
+	if (!strcmp(rtd->dai_link->name, "HDMI"))
+		return 0;
+
+	if (ret) {
+		dev_err(codec_dai->dev, "Can't set codec dai clock %d\n", ret);
 		return ret;
 	}
 
@@ -152,20 +203,67 @@ static const struct snd_soc_ops rk_aif1_ops = {
 	.startup = rk_aif1_startup,
 };
 
-SND_SOC_DAILINK_DEFS(hifi,
+SND_SOC_DAILINK_DEFS(analog,
 		     DAILINK_COMP_ARRAY(COMP_EMPTY()),
 		     DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "HiFi")),
 		     DAILINK_COMP_ARRAY(COMP_EMPTY()));
 
-static struct snd_soc_dai_link rk_dailink = {
+SND_SOC_DAILINK_DEFS(hdmi,
+		     DAILINK_COMP_ARRAY(COMP_EMPTY()),
+		     DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "i2s-hifi")),
+		     DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+enum {
+	DAILINK_MAX98090,
+	DAILINK_HDMI,
+};
+
+/* max98090 dai_link */
+static struct snd_soc_dai_link rk_max98090_dailinks[] = {
+	{
 		.name = "max98090",
-	.stream_name = "Audio",
+		.stream_name = "Analog",
 		.init = rk_init,
 		.ops = &rk_aif1_ops,
 		/* set max98090 as slave */
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 			SND_SOC_DAIFMT_CBS_CFS,
-	SND_SOC_DAILINK_REG(hifi),
+		SND_SOC_DAILINK_REG(analog),
+	},
+};
+
+/* HDMI codec dai_link */
+static struct snd_soc_dai_link rk_hdmi_dailinks[] = {
+	{
+		.name = "HDMI",
+		.stream_name = "HDMI",
+		.ops = &rk_aif1_ops,
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS,
+		SND_SOC_DAILINK_REG(hdmi),
+	}
+};
+
+/* max98090 and HDMI codec dai_link */
+static struct snd_soc_dai_link rk_max98090_hdmi_dailinks[] = {
+	[DAILINK_MAX98090] = {
+		.name = "max98090",
+		.stream_name = "Analog",
+		.init = rk_init,
+		.ops = &rk_aif1_ops,
+		/* set max98090 as slave */
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS,
+		SND_SOC_DAILINK_REG(analog),
+	},
+	[DAILINK_HDMI] = {
+		.name = "HDMI",
+		.stream_name = "HDMI",
+		.ops = &rk_aif1_ops,
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS,
+		SND_SOC_DAILINK_REG(hdmi),
+	}
 };
 
 static int rk_98090_headset_init(struct snd_soc_component *component);
@@ -175,19 +273,47 @@ static struct snd_soc_aux_dev rk_98090_headset_dev = {
 	.init = rk_98090_headset_init,
 };
 
-static struct snd_soc_card snd_soc_card_rk = {
+static struct snd_soc_card rockchip_max98090_card = {
 	.name = "ROCKCHIP-I2S",
 	.owner = THIS_MODULE,
-	.dai_link = &rk_dailink,
-	.num_links = 1,
+	.dai_link = rk_max98090_dailinks,
+	.num_links = ARRAY_SIZE(rk_max98090_dailinks),
+	.aux_dev = &rk_98090_headset_dev,
+	.num_aux_devs = 1,
+	.dapm_widgets = rk_max98090_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(rk_max98090_dapm_widgets),
+	.dapm_routes = rk_max98090_audio_map,
+	.num_dapm_routes = ARRAY_SIZE(rk_max98090_audio_map),
+	.controls = rk_max98090_controls,
+	.num_controls = ARRAY_SIZE(rk_max98090_controls),
+};
+
+static struct snd_soc_card rockchip_hdmi_card = {
+	.name = "ROCKCHIP-HDMI",
+	.owner = THIS_MODULE,
+	.dai_link = rk_hdmi_dailinks,
+	.num_links = ARRAY_SIZE(rk_hdmi_dailinks),
+	.dapm_widgets = rk_hdmi_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(rk_hdmi_dapm_widgets),
+	.dapm_routes = rk_hdmi_audio_map,
+	.num_dapm_routes = ARRAY_SIZE(rk_hdmi_audio_map),
+	.controls = rk_hdmi_controls,
+	.num_controls = ARRAY_SIZE(rk_hdmi_controls),
+};
+
+static struct snd_soc_card rockchip_max98090_hdmi_card = {
+	.name = "ROCKCHIP-MAX98090-HDMI",
+	.owner = THIS_MODULE,
+	.dai_link = rk_max98090_hdmi_dailinks,
+	.num_links = ARRAY_SIZE(rk_max98090_hdmi_dailinks),
 	.aux_dev = &rk_98090_headset_dev,
 	.num_aux_devs = 1,
-	.dapm_widgets = rk_dapm_widgets,
-	.num_dapm_widgets = ARRAY_SIZE(rk_dapm_widgets),
-	.dapm_routes = rk_audio_map,
-	.num_dapm_routes = ARRAY_SIZE(rk_audio_map),
-	.controls = rk_mc_controls,
-	.num_controls = ARRAY_SIZE(rk_mc_controls),
+	.dapm_widgets = rk_max98090_hdmi_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(rk_max98090_hdmi_dapm_widgets),
+	.dapm_routes = rk_max98090_hdmi_audio_map,
+	.num_dapm_routes = ARRAY_SIZE(rk_max98090_hdmi_audio_map),
+	.controls = rk_max98090_hdmi_controls,
+	.num_controls = ARRAY_SIZE(rk_max98090_hdmi_controls),
 };
 
 static int rk_98090_headset_init(struct snd_soc_component *component)
@@ -195,7 +321,7 @@ static int rk_98090_headset_init(struct snd_soc_component *component)
 	int ret;
 
 	/* Enable Headset and 4 Buttons Jack detection */
-	ret = snd_soc_card_jack_new(&snd_soc_card_rk, "Headset Jack",
+	ret = snd_soc_card_jack_new(component->card, "Headset Jack",
 				    SND_JACK_HEADSET |
 				    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
 				    SND_JACK_BTN_2 | SND_JACK_BTN_3,
@@ -210,41 +336,75 @@ static int rk_98090_headset_init(struct snd_soc_component *component)
 	return ret;
 }
 
+static int rk_parse_headset_from_of(struct device *dev, struct device_node *np)
+{
+	rk_98090_headset_dev.dlc.of_node = of_parse_phandle(
+			np, "rockchip,headset-codec", 0);
+	if (!rk_98090_headset_dev.dlc.of_node) {
+		dev_err(dev,
+			"Property 'rockchip,headset-codec' missing/invalid\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
 static int snd_rk_mc_probe(struct platform_device *pdev)
 {
 	int ret = 0;
-	struct snd_soc_card *card = &snd_soc_card_rk;
+	struct snd_soc_card *card;
+	struct device *dev = &pdev->dev;
 	struct device_node *np = pdev->dev.of_node;
+	struct device_node *np_cpu;
+	struct device_node *np_audio, *np_hdmi;
 
-	/* register the soc card */
-	card->dev = &pdev->dev;
+	/* Parse DTS for I2S controller. */
+	np_cpu = of_parse_phandle(np, "rockchip,i2s-controller", 0);
 
-	rk_dailink.codecs->of_node = of_parse_phandle(np,
-			"rockchip,audio-codec", 0);
-	if (!rk_dailink.codecs->of_node) {
+	if (!np_cpu) {
 		dev_err(&pdev->dev,
-			"Property 'rockchip,audio-codec' missing or invalid\n");
+			"Property 'rockchip,i2s-controller missing or invalid\n");
 		return -EINVAL;
 	}
 
-	rk_dailink.cpus->of_node = of_parse_phandle(np,
-			"rockchip,i2s-controller", 0);
-	if (!rk_dailink.cpus->of_node) {
-		dev_err(&pdev->dev,
-			"Property 'rockchip,i2s-controller' missing or invalid\n");
+	/*
+	 * Find the card to use based on the presences of audio codec
+	 * and hdmi codec in device property. Set their of_node accordingly.
+	 */
+	np_audio = of_parse_phandle(np, "rockchip,audio-codec", 0);
+	np_hdmi = of_parse_phandle(np, "rockchip,hdmi-codec", 0);
+	if (np_audio && np_hdmi) {
+		card = &rockchip_max98090_hdmi_card;
+		card->dai_link[DAILINK_MAX98090].codecs->of_node = np_audio;
+		card->dai_link[DAILINK_HDMI].codecs->of_node = np_hdmi;
+		card->dai_link[DAILINK_MAX98090].cpus->of_node = np_cpu;
+		card->dai_link[DAILINK_MAX98090].platforms->of_node = np_cpu;
+		card->dai_link[DAILINK_HDMI].cpus->of_node = np_cpu;
+		card->dai_link[DAILINK_HDMI].platforms->of_node = np_cpu;
+	} else if (np_audio) {
+		card = &rockchip_max98090_card;
+		card->dai_link[0].codecs->of_node = np_audio;
+		card->dai_link[0].cpus->of_node = np_cpu;
+		card->dai_link[0].platforms->of_node = np_cpu;
+	} else if (np_hdmi) {
+		card = &rockchip_hdmi_card;
+		card->dai_link[0].codecs->of_node = np_hdmi;
+		card->dai_link[0].cpus->of_node = np_cpu;
+		card->dai_link[0].platforms->of_node = np_cpu;
+	} else {
+		dev_err(dev, "At least one of codecs should be specified\n");
 		return -EINVAL;
 	}
 
-	rk_dailink.platforms->of_node = rk_dailink.cpus->of_node;
+	card->dev = dev;
 
-	rk_98090_headset_dev.dlc.of_node = of_parse_phandle(np,
-			"rockchip,headset-codec", 0);
-	if (!rk_98090_headset_dev.dlc.of_node) {
-		dev_err(&pdev->dev,
-			"Property 'rockchip,headset-codec' missing/invalid\n");
-		return -EINVAL;
+	/* Parse headset detection codec. */
+	if (np_audio) {
+		ret = rk_parse_headset_from_of(dev, np);
+		if (ret)
+			return ret;
 	}
 
+	/* Parse card name. */
 	ret = snd_soc_of_parse_card_name(card, "rockchip,model");
 	if (ret) {
 		dev_err(&pdev->dev,
@@ -252,6 +412,7 @@ static int snd_rk_mc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	/* register the soc card */
 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 	if (ret) {
 		dev_err(&pdev->dev,