ASoC: Intel: bytcr_rt5640: Add support for a second headset mic input

Some devices (HP Elitepad 1000 G2) have 2 headset jacks (1 on the dock,
2nd on the tablet itself). The 2nd headset mic input on these is
connected to in1 (the internal mics on the HP Elitepad 1000 G2 use DMIC2).

Add support for this through a new BYT_RT5640_HSMIC2_ON_IN1 quirk.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210802142501.991985-6-hdegoede@redhat.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/bytcr_rt5640.c

@@ -75,6 +75,7 @@ enum {
 #define BYT_RT5640_NO_SPEAKERS		BIT(24)
 #define BYT_RT5640_LINEOUT		BIT(25)
 #define BYT_RT5640_LINEOUT_AS_HP2	BIT(26)
+#define BYT_RT5640_HSMIC2_ON_IN1	BIT(27)
 
 #define BYTCR_INPUT_DEFAULTS				\
 	(BYT_RT5640_IN3_MAP |				\
@@ -127,6 +128,8 @@ static void log_quirks(struct device *dev)
 		dev_err(dev, "quirk map 0x%x is not supported, microphone input will not work\n", map);
 		break;
 	}
+	if (byt_rt5640_quirk & BYT_RT5640_HSMIC2_ON_IN1)
+		dev_info(dev, "quirk HSMIC2_ON_IN1 enabled\n");
 	if (BYT_RT5640_JDSRC(byt_rt5640_quirk)) {
 		dev_info(dev, "quirk realtek,jack-detect-source %ld\n",
 			 BYT_RT5640_JDSRC(byt_rt5640_quirk));
@@ -1072,6 +1075,14 @@ static int byt_rt5640_init(struct snd_soc_pcm_runtime *runtime)
 	if (ret)
 		return ret;
 
+	if (byt_rt5640_quirk & BYT_RT5640_HSMIC2_ON_IN1) {
+		ret = snd_soc_dapm_add_routes(&card->dapm,
+					byt_rt5640_intmic_in1_map,
+					ARRAY_SIZE(byt_rt5640_intmic_in1_map));
+		if (ret)
+			return ret;
+	}
+
 	if (byt_rt5640_quirk & BYT_RT5640_SSP2_AIF2) {
 		ret = snd_soc_dapm_add_routes(&card->dapm,
 					byt_rt5640_ssp2_aif2_map,
@@ -1347,6 +1358,7 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
 	static const char * const map_name[] = { "dmic1", "dmic2", "in1", "in3", "none" };
 	__maybe_unused const char *spk_type;
 	const struct dmi_system_id *dmi_id;
+	const char *headset2_string = "";
 	const char *lineout_string = "";
 	struct byt_rt5640_private *priv;
 	struct snd_soc_acpi_mach *mach;
@@ -1517,10 +1529,13 @@ static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
 			lineout_string = " cfg-lineout:1";
 	}
 
+	if (byt_rt5640_quirk & BYT_RT5640_HSMIC2_ON_IN1)
+		headset2_string = " cfg-hs2:in1";
+
 	snprintf(byt_rt5640_components, sizeof(byt_rt5640_components),
-		 "cfg-spk:%d cfg-mic:%s aif:%d%s", cfg_spk,
+		 "cfg-spk:%d cfg-mic:%s aif:%d%s%s", cfg_spk,
 		 map_name[BYT_RT5640_MAP(byt_rt5640_quirk)], aif,
-		 lineout_string);
+		 lineout_string, headset2_string);
 	byt_rt5640_card.components = byt_rt5640_components;
 #if !IS_ENABLED(CONFIG_SND_SOC_INTEL_USER_FRIENDLY_LONG_NAMES)
 	snprintf(byt_rt5640_long_name, sizeof(byt_rt5640_long_name),