[PATCH v8 3/6] ASoC: rockchip_max98090: Optionally support HDMI use case

[Cheng-Yi Chiang <cychiang@chromium.org>]

Support three different use cases with rockchip_max98090 driver:

- 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.

Note that we keep max98090 only usage for backward compatibility.
From devicetree, different compatible string can be passed to configure
the usage.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
---
The checkpatch error
"Macros with complex values should be enclosed in parentheses"
seems not suitable for the macro usage for DAPM widget, route, and controls.

 sound/soc/rockchip/rockchip_max98090.c | 371 ++++++++++++++++++++-----
 1 file changed, 303 insertions(+), 68 deletions(-)

diff --git a/sound/soc/rockchip/rockchip_max98090.c b/sound/soc/rockchip/rockchip_max98090.c
index 0097df1fae66..550e57789719 100644
--- a/sound/soc/rockchip/rockchip_max98090.c
+++ b/sound/soc/rockchip/rockchip_max98090.c
@@ -6,11 +6,13 @@
  */
 
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
 #include <sound/core.h>
+#include <sound/hdmi-codec.h>
 #include <sound/jack.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -21,6 +23,17 @@
 
 #define DRV_NAME "rockchip-snd-max98090"
 
+enum rk_snd_usage {
+	RK_USE_MAX98090, /* Only use max98090. */
+	RK_USE_HDMI, /* Only use HDMI. */
+	RK_USE_MAX98090_HDMI, /* Use both max98090 and HDMI. */
+};
+
+struct rk_card_config {
+	enum rk_snd_usage usage;
+	struct snd_soc_card *card;
+};
+
 static struct snd_soc_jack headset_jack;
 
 /* Headset jack detection DAPM pins */
@@ -36,28 +49,73 @@ 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_hdmi_audio_map[] = {
+	RK_HDMI_AUDIO_MAP,
+};
+
+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_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_kcontrol_new rk_hdmi_controls[] = {
+	RK_HDMI_CONTROLS,
 };
 
-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_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 +180,20 @@ 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 +215,67 @@ static const struct snd_soc_ops rk_aif1_ops = {
 	.startup = rk_aif1_startup,
 };
 
-SND_SOC_DAILINK_DEFS(hifi,
-	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 = {
-	.name = "max98090",
-	.stream_name = "Audio",
-	.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_DEFS(analog,
+		     DAILINK_COMP_ARRAY(COMP_EMPTY()),
+		     DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "HiFi")),
+		     DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+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 = "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),
+	},
+};
+
+/* 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 +285,47 @@ 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 +333,7 @@ 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 +348,112 @@ static int rk_98090_headset_init(struct snd_soc_component *component)
 	return ret;
 }
 
+static int rk_parse_codec_from_of(struct device *dev, struct device_node *np,
+				  const char *codec_property_name,
+				  struct snd_soc_dai_link_component *codecs)
+{
+	struct device_node *np_codec;
+
+	np_codec = of_parse_phandle(np, codec_property_name, 0);
+	if (!np_codec) {
+		dev_err(dev,
+			"Property %s missing or invalid\n",
+			codec_property_name);
+		return -EINVAL;
+	}
+
+	codecs->of_node = np_codec;
+	return 0;
+}
+
+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;
+	const struct of_device_id *match;
+	struct rk_card_config *config;
+	enum rk_snd_usage usage;
+
+	/* Find the config and card to use based on match table. */
+	match = of_match_device(dev->driver->of_match_table, dev);
+	if (!match || !match->data)
+		return -EINVAL;
 
-	/* register the soc card */
-	card->dev = &pdev->dev;
+	config = (struct rk_card_config *)match->data;
+	card = config->card;
+	usage = config->usage;
+	card->dev = dev;
 
-	rk_dailink.codecs->of_node = of_parse_phandle(np,
-			"rockchip,audio-codec", 0);
-	if (!rk_dailink.codecs->of_node) {
+	/* Parse DTS for I2S controller. */
+	np_cpu = of_parse_phandle(np, "rockchip,i2s-controller", 0);
+
+	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");
-		return -EINVAL;
+	/* Parse DTS for max98090-only card. */
+	if (usage == RK_USE_MAX98090) {
+		ret = rk_parse_codec_from_of(dev, np, "rockchip,audio-codec",
+					     card->dai_link[0].codecs);
+		if (ret)
+			return ret;
+		card->dai_link[0].cpus->of_node = np_cpu;
+		card->dai_link[0].platforms->of_node = np_cpu;
 	}
 
-	rk_dailink.platforms->of_node = rk_dailink.cpus->of_node;
+	/* Parse DTS for HDMI-only card. */
+	if (usage == RK_USE_HDMI) {
+		ret = rk_parse_codec_from_of(dev, np, "rockchip,hdmi-codec",
+					     card->dai_link[0].codecs);
+		if (ret)
+			return ret;
+		card->dai_link[0].cpus->of_node = np_cpu;
+		card->dai_link[0].platforms->of_node = np_cpu;
+	}
 
-	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 DTS for max98090 plus HDMI card. */
+	if (usage == RK_USE_MAX98090_HDMI) {
+		ret = rk_parse_codec_from_of(
+			dev, np, "rockchip,audio-codec",
+			card->dai_link[DAILINK_MAX98090].codecs);
+		if (ret)
+			return ret;
+		ret = rk_parse_codec_from_of(
+			dev, np, "rockchip,hdmi-codec",
+			card->dai_link[DAILINK_HDMI].codecs);
+		if (ret)
+			return ret;
+		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;
 	}
 
+	/* Parse headset detection codec. */
+	if (usage == RK_USE_MAX98090 || usage == RK_USE_MAX98090_HDMI) {
+		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 +461,7 @@ 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,
@@ -262,9 +472,34 @@ static int snd_rk_mc_probe(struct platform_device *pdev)
 	return ret;
 }
 
+struct rk_card_config rk_card_configs[] = {
+	[RK_USE_MAX98090] = {
+		.usage = RK_USE_MAX98090,
+		.card = &rockchip_max98090_card,
+	},
+	[RK_USE_HDMI] = {
+		.usage = RK_USE_HDMI,
+		.card = &rockchip_hdmi_card,
+	},
+	[RK_USE_MAX98090_HDMI] = {
+		.usage = RK_USE_MAX98090_HDMI,
+		.card = &rockchip_max98090_hdmi_card,
+	},
+};
+
 static const struct of_device_id rockchip_max98090_of_match[] = {
-	{ .compatible = "rockchip,rockchip-audio-max98090", },
-	{},
+	{
+		.compatible = "rockchip,rockchip-audio-max98090",
+		.data = &rk_card_configs[RK_USE_MAX98090],
+	},
+	{
+		.compatible = "rockchip,rockchip-audio-hdmi",
+		.data = &rk_card_configs[RK_USE_HDMI],
+	},
+	{
+		.compatible = "rockchip,rockchip-audio-max98090-hdmi",
+		.data = &rk_card_configs[RK_USE_MAX98090_HDMI],
+	},
 };
 
 MODULE_DEVICE_TABLE(of, rockchip_max98090_of_match);
-- 
2.24.0.rc0.303.g954a862665-goog