ASoC: Intel: board_helpers: new module for common functions

Create a new module to host common functions for machine drivers. This
patch supports Intel HDMI DAI link initialization.

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20231012190826.142619-20-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/Kconfig

@@ -44,6 +44,9 @@ config SND_SOC_INTEL_SOF_NUVOTON_COMMON
 config SND_SOC_INTEL_SOF_SSP_COMMON
 	tristate
 
+config SND_SOC_INTEL_SOF_BOARD_HELPERS
+	tristate
+
 if SND_SOC_INTEL_CATPT
 
 config SND_SOC_INTEL_HASWELL_MACH

sound/soc/intel/boards/Makefile

@@ -102,3 +102,6 @@ obj-$(CONFIG_SND_SOC_INTEL_SOF_NUVOTON_COMMON) += snd-soc-intel-sof-nuvoton-comm
 
 snd-soc-intel-sof-ssp-common-objs += sof_ssp_common.o
 obj-$(CONFIG_SND_SOC_INTEL_SOF_SSP_COMMON) += snd-soc-intel-sof-ssp-common.o
+
+snd-soc-intel-sof-board-helpers-objs += sof_board_helpers.o
+obj-$(CONFIG_SND_SOC_INTEL_SOF_BOARD_HELPERS) += snd-soc-intel-sof-board-helpers.o

sound/soc/intel/boards/sof_board_helpers.c

@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright(c) 2023 Intel Corporation. All rights reserved.
+
+#include <sound/soc.h>
+#include "hda_dsp_common.h"
+#include "sof_board_helpers.h"
+
+/*
+ * Intel HDMI DAI Link
+ */
+static int hdmi_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct sof_card_private *ctx = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *dai = snd_soc_rtd_to_codec(rtd, 0);
+
+	ctx->hdmi.hdmi_comp = dai->component;
+
+	return 0;
+}
+
+int sof_intel_board_card_late_probe(struct snd_soc_card *card)
+{
+	struct sof_card_private *ctx = snd_soc_card_get_drvdata(card);
+
+	if (!ctx->hdmi_num)
+		return 0;
+
+	if (!ctx->hdmi.idisp_codec)
+		return 0;
+
+	if (!ctx->hdmi.hdmi_comp)
+		return -EINVAL;
+
+	return hda_dsp_hdmi_build_controls(card, ctx->hdmi.hdmi_comp);
+}
+EXPORT_SYMBOL_NS(sof_intel_board_card_late_probe, SND_SOC_INTEL_SOF_BOARD_HELPERS);
+
+/*
+ * DAI Link Helpers
+ */
+static struct snd_soc_dai_link_component platform_component[] = {
+	{
+		/* name might be overridden during probe */
+		.name = "0000:00:1f.3"
+	}
+};
+
+int sof_intel_board_set_intel_hdmi_link(struct device *dev,
+					struct snd_soc_dai_link *link, int be_id,
+					int hdmi_id, bool idisp_codec)
+{
+	struct snd_soc_dai_link_component *cpus, *codecs;
+
+	dev_dbg(dev, "link %d: intel hdmi, hdmi id %d, idisp codec %d\n",
+		be_id, hdmi_id, idisp_codec);
+
+	/* link name */
+	link->name = devm_kasprintf(dev, GFP_KERNEL, "iDisp%d", hdmi_id);
+	if (!link->name)
+		return -ENOMEM;
+
+	/* cpus */
+	cpus = devm_kzalloc(dev, sizeof(struct snd_soc_dai_link_component),
+			    GFP_KERNEL);
+	if (!cpus)
+		return -ENOMEM;
+
+	cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "iDisp%d Pin", hdmi_id);
+	if (!cpus->dai_name)
+		return -ENOMEM;
+
+	link->cpus = cpus;
+	link->num_cpus = 1;
+
+	/* codecs */
+	if (idisp_codec) {
+		codecs = devm_kzalloc(dev,
+				      sizeof(struct snd_soc_dai_link_component),
+				      GFP_KERNEL);
+		if (!codecs)
+			return -ENOMEM;
+
+		codecs->name = "ehdaudio0D2";
+		codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL,
+						  "intel-hdmi-hifi%d", hdmi_id);
+		if (!codecs->dai_name)
+			return -ENOMEM;
+
+		link->codecs = codecs;
+	} else {
+		link->codecs = &snd_soc_dummy_dlc;
+	}
+	link->num_codecs = 1;
+
+	/* platforms */
+	link->platforms = platform_component;
+	link->num_platforms = ARRAY_SIZE(platform_component);
+
+	link->id = be_id;
+	link->init = (hdmi_id == 1) ? hdmi_init : NULL;
+	link->no_pcm = 1;
+	link->dpcm_playback = 1;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(sof_intel_board_set_intel_hdmi_link, SND_SOC_INTEL_SOF_BOARD_HELPERS);
+
+MODULE_DESCRIPTION("ASoC Intel SOF Machine Driver Board Helpers");
+MODULE_AUTHOR("Brent Lu <brent.lu@intel.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(SND_SOC_INTEL_HDA_DSP_COMMON);

sound/soc/intel/boards/sof_board_helpers.h

@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2023 Intel Corporation.
+ */
+
+#ifndef __SOF_INTEL_BOARD_HELPERS_H
+#define __SOF_INTEL_BOARD_HELPERS_H
+
+#include <sound/soc.h>
+#include "sof_hdmi_common.h"
+#include "sof_ssp_common.h"
+
+/*
+ * sof_rt5682_private: private data for rt5682 machine driver
+ *
+ * @mclk: mclk clock data
+ * @is_legacy_cpu: true for BYT/CHT boards
+ */
+struct sof_rt5682_private {
+	struct clk *mclk;
+	bool is_legacy_cpu;
+};
+
+/*
+ * sof_card_private: common data for machine drivers
+ *
+ * @headset_jack: headset jack data
+ * @hdmi: init data for hdmi dai link
+ * @codec_type: type of headset codec
+ * @amp_type: type of speaker amplifier
+ * @hdmi_num: number of Intel HDMI BE link
+ * @rt5682: private data for rt5682 machine driver
+ */
+struct sof_card_private {
+	struct snd_soc_jack headset_jack;
+	struct sof_hdmi_private hdmi;
+
+	enum sof_ssp_codec codec_type;
+	enum sof_ssp_codec amp_type;
+
+	int hdmi_num;
+
+	union {
+		struct sof_rt5682_private rt5682;
+	};
+};
+
+int sof_intel_board_card_late_probe(struct snd_soc_card *card);
+
+int sof_intel_board_set_intel_hdmi_link(struct device *dev,
+					struct snd_soc_dai_link *link, int be_id,
+					int hdmi_id, bool idisp_codec);
+
+#endif /* __SOF_INTEL_BOARD_HELPERS_H */