ASoC: Intel: sof_sdw: Add helper function for cs42l42 codec

Helper functions added to support CS42l42 soundwire codec.
Build configuration is updated to include this codec.

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Uday M Bhat <uday.m.bhat@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230602202225.249209-24-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/Kconfig

@@ -676,6 +676,7 @@ config SND_SOC_INTEL_SOUNDWIRE_SOF_MACH
 	select SND_SOC_RT715_SDW
 	select SND_SOC_RT715_SDCA_SDW
 	select SND_SOC_RT5682_SDW
+	select SND_SOC_CS42L42_SDW
 	select SND_SOC_DMIC
 	select SND_SOC_INTEL_HDA_DSP_COMMON
 	select SND_SOC_INTEL_SOF_MAXIM_COMMON

sound/soc/intel/boards/Makefile

@@ -42,6 +42,7 @@ snd-soc-sof-sdw-objs += sof_sdw.o				\
 			sof_sdw_rt711.o sof_sdw_rt_sdca_jack_common.o	\
 			sof_sdw_rt712_sdca.o sof_sdw_rt715.o	\
 			sof_sdw_rt715_sdca.o sof_sdw_dmic.o	\
+			sof_sdw_cs42l42.o \
 			sof_sdw_hdmi.o
 obj-$(CONFIG_SND_SOC_INTEL_SOF_RT5682_MACH) += snd-soc-sof_rt5682.o
 obj-$(CONFIG_SND_SOC_INTEL_SOF_CS42L42_MACH) += snd-soc-sof_cs42l42.o

sound/soc/intel/boards/sof_sdw.c

@@ -823,6 +823,19 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 		},
 		.dai_num = 1,
 	},
+	{
+		.part_id = 0x4242,
+		.dais = {
+			{
+				.direction = {true, true},
+				.dai_name = "cs42l42-sdw",
+				.dai_type = SOF_SDW_DAI_TYPE_JACK,
+				.dailink = {SDW_JACK_OUT_DAI_ID, SDW_JACK_IN_DAI_ID},
+				.init = sof_sdw_cs42l42_init,
+			},
+		},
+		.dai_num = 1,
+	},
 	{
 		.part_id = 0xaaaa, /* generic codec mockup */
 		.version_id = 0,

sound/soc/intel/boards/sof_sdw_common.h

@@ -196,4 +196,11 @@ int sof_sdw_rt5682_init(struct snd_soc_card *card,
 			struct sof_sdw_codec_info *info,
 			bool playback);
 
+/* CS42L42 support */
+int sof_sdw_cs42l42_init(struct snd_soc_card *card,
+			 const struct snd_soc_acpi_link_adr *link,
+			 struct snd_soc_dai_link *dai_links,
+			 struct sof_sdw_codec_info *info,
+			 bool playback);
+
 #endif

sound/soc/intel/boards/sof_sdw_cs42l42.c

@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2023 Intel Corporation
+
+/*
+ *  sof_sdw_cs42l42 - Helpers to handle CS42L42 from generic machine driver
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_type.h>
+#include <sound/control.h>
+#include <sound/soc.h>
+#include <sound/soc-acpi.h>
+#include <sound/soc-dapm.h>
+#include <sound/jack.h>
+#include "sof_sdw_common.h"
+
+static const struct snd_soc_dapm_widget cs42l42_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_MIC("Headset Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route cs42l42_map[] = {
+	/* HP jack connectors - unknown if we have jack detection */
+	{"Headphone", NULL, "cs42l42 HP"},
+
+	/* other jacks */
+	{"cs42l42 HS", NULL, "Headset Mic"},
+};
+
+static const struct snd_kcontrol_new cs42l42_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Headphone"),
+	SOC_DAPM_PIN_SWITCH("Headset Mic"),
+};
+
+static struct snd_soc_jack_pin cs42l42_jack_pins[] = {
+	{
+		.pin    = "Headphone",
+		.mask   = SND_JACK_HEADPHONE,
+	},
+	{
+		.pin    = "Headset Mic",
+		.mask   = SND_JACK_MICROPHONE,
+	},
+};
+
+static int cs42l42_rtd_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_card *card = rtd->card;
+	struct mc_private *ctx = snd_soc_card_get_drvdata(card);
+	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+	struct snd_soc_component *component = codec_dai->component;
+	struct snd_soc_jack *jack;
+	int ret;
+
+	card->components = devm_kasprintf(card->dev, GFP_KERNEL,
+					  "%s hs:cs42l42",
+					  card->components);
+	if (!card->components)
+		return -ENOMEM;
+
+	ret = snd_soc_add_card_controls(card, cs42l42_controls,
+					ARRAY_SIZE(cs42l42_controls));
+	if (ret) {
+		dev_err(card->dev, "cs42l42 control addition failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dapm_new_controls(&card->dapm, cs42l42_widgets,
+					ARRAY_SIZE(cs42l42_widgets));
+	if (ret) {
+		dev_err(card->dev, "cs42l42 widgets addition failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dapm_add_routes(&card->dapm, cs42l42_map,
+				      ARRAY_SIZE(cs42l42_map));
+
+	if (ret) {
+		dev_err(card->dev, "cs42l42 map addition failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_card_jack_new_pins(rtd->card, "Headset Jack",
+					 SND_JACK_HEADSET | SND_JACK_BTN_0 |
+					 SND_JACK_BTN_1 | SND_JACK_BTN_2 |
+					 SND_JACK_BTN_3,
+					 &ctx->sdw_headset,
+					 cs42l42_jack_pins,
+					 ARRAY_SIZE(cs42l42_jack_pins));
+	if (ret) {
+		dev_err(rtd->card->dev, "Headset Jack creation failed: %d\n",
+			ret);
+		return ret;
+	}
+
+	jack = &ctx->sdw_headset;
+
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
+
+	ret = snd_soc_component_set_jack(component, jack, NULL);
+
+	if (ret)
+		dev_err(rtd->card->dev, "Headset Jack call-back failed: %d\n",
+			ret);
+
+	return ret;
+}
+
+int sof_sdw_cs42l42_init(struct snd_soc_card *card,
+			 const struct snd_soc_acpi_link_adr *link,
+			 struct snd_soc_dai_link *dai_links,
+			 struct sof_sdw_codec_info *info,
+			 bool playback)
+{
+	/*
+	 * headset should be initialized once.
+	 * Do it with dai link for playback.
+	 */
+	if (!playback)
+		return 0;
+
+	dai_links->init = cs42l42_rtd_init;
+
+	return 0;
+}