soc/intel/apollolake: Add support for DMIC 4ch & 1ch

Add NHLT support for DMIC Quad & Mono channel capture

BUG=chrome-os-partner:56918
BRANCH=none

Change-Id: If630ed53bb2cf00ccc441eb062b2e8c650d3cf01
Signed-off-by: Sathyanarayana Nujella <sathyanarayana.nujella@intel.com>
Reviewed-on: https://review.coreboot.org/17156
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/apollolake/Kconfig

@@ -210,6 +210,13 @@ config IFWI_FILE_NAME
 	help
 	  Name of file to store in the IFWI region.
 
+config NHLT_DMIC_1CH_16B
+	bool
+	depends on ACPI_NHLT
+	default n
+	help
+	  Include DSP firmware settings for 1 channel 16B DMIC array.
+
 config NHLT_DMIC_2CH_16B
 	bool
 	depends on ACPI_NHLT
@@ -217,6 +224,13 @@ config NHLT_DMIC_2CH_16B
 	help
 	  Include DSP firmware settings for 2 channel 16B DMIC array.
 
+config NHLT_DMIC_4CH_16B
+	bool
+	depends on ACPI_NHLT
+	default n
+	help
+	  Include DSP firmware settings for 4 channel 16B DMIC array.
+
 config NHLT_MAX98357
 	bool
 	depends on ACPI_NHLT

src/soc/intel/apollolake/Makefile.inc

@@ -124,14 +124,24 @@ endif
 
 # DSP firmware settings files.
 NHLT_BLOB_PATH = 3rdparty/blobs/soc/intel/apollolake/nhlt-blobs
+DMIC_1CH_48KHZ_16B = dmic-1ch-48khz-16b.bin
 DMIC_2CH_48KHZ_16B = dmic-2ch-48khz-16b.bin
+DMIC_4CH_48KHZ_16B = dmic-4ch-48khz-16b.bin
 MAX98357_RENDER = max98357-render-2ch-48khz-24b.bin
 DA7219_RENDER_CAPTURE = dialog-2ch-48khz-24b.bin
 
+cbfs-files-$(CONFIG_NHLT_DMIC_1CH_16B) += $(DMIC_1CH_48KHZ_16B)
+$(DMIC_1CH_48KHZ_16B)-file := $(NHLT_BLOB_PATH)/$(DMIC_1CH_48KHZ_16B)
+$(DMIC_1CH_48KHZ_16B)-type := raw
+
 cbfs-files-$(CONFIG_NHLT_DMIC_2CH_16B) += $(DMIC_2CH_48KHZ_16B)
 $(DMIC_2CH_48KHZ_16B)-file := $(NHLT_BLOB_PATH)/$(DMIC_2CH_48KHZ_16B)
 $(DMIC_2CH_48KHZ_16B)-type := raw
 
+cbfs-files-$(CONFIG_NHLT_DMIC_4CH_16B) += $(DMIC_4CH_48KHZ_16B)
+$(DMIC_4CH_48KHZ_16B)-file := $(NHLT_BLOB_PATH)/$(DMIC_4CH_48KHZ_16B)
+$(DMIC_4CH_48KHZ_16B)-type := raw
+
 cbfs-files-$(CONFIG_NHLT_MAX98357) += $(MAX98357_RENDER)
 $(MAX98357_RENDER)-file := $(NHLT_BLOB_PATH)/$(MAX98357_RENDER)
 $(MAX98357_RENDER)-type := raw

src/soc/intel/apollolake/nhlt.c

@@ -18,6 +18,38 @@
 #include <nhlt.h>
 #include <soc/nhlt.h>
 
+static const struct nhlt_format_config dmic_1ch_formats[] = {
+	/* 48 KHz 16-bits per sample. */
+	{
+		.num_channels = 1,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 16,
+		.valid_bits_per_sample = 16,
+		.settings_file = "dmic-1ch-48khz-16b.bin",
+	},
+};
+
+static const struct nhlt_dmic_array_config dmic_1ch_mic_config = {
+	.tdm_config = {
+		.config_type = NHLT_TDM_MIC_ARRAY,
+	},
+	.array_type = NHLT_MIC_ARRAY_VENDOR_DEFINED,
+};
+
+static const struct nhlt_endp_descriptor dmic_1ch_descriptors[] = {
+	{
+		.link = NHLT_LINK_PDM,
+		.device = NHLT_PDM_DEV,
+		.direction = NHLT_DIR_CAPTURE,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_DMIC,
+		.cfg = &dmic_1ch_mic_config,
+		.cfg_size = sizeof(dmic_1ch_mic_config),
+		.formats = dmic_1ch_formats,
+		.num_formats = ARRAY_SIZE(dmic_1ch_formats),
+	},
+};
+
 static const struct nhlt_format_config dmic_2ch_formats[] = {
 	/* 48 KHz 16-bits per sample. */
 	{
@@ -50,6 +82,38 @@ static const struct nhlt_endp_descriptor dmic_2ch_descriptors[] = {
 	},
 };
 
+static const struct nhlt_format_config dmic_4ch_formats[] = {
+	/* 48 KHz 16-bits per sample. */
+	{
+		.num_channels = 4,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 16,
+		.valid_bits_per_sample = 16,
+		.settings_file = "dmic-4ch-48khz-16b.bin",
+	},
+};
+
+static const struct nhlt_dmic_array_config dmic_4ch_mic_config = {
+	.tdm_config = {
+		.config_type = NHLT_TDM_MIC_ARRAY,
+	},
+	.array_type = NHLT_MIC_ARRAY_4CH_L_SHAPED,
+};
+
+static const struct nhlt_endp_descriptor dmic_4ch_descriptors[] = {
+	{
+		.link = NHLT_LINK_PDM,
+		.device = NHLT_PDM_DEV,
+		.direction = NHLT_DIR_CAPTURE,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_DMIC,
+		.cfg = &dmic_4ch_mic_config,
+		.cfg_size = sizeof(dmic_4ch_mic_config),
+		.formats = dmic_4ch_formats,
+		.num_formats = ARRAY_SIZE(dmic_4ch_formats),
+	},
+};
+
 static const struct nhlt_format_config da7219_formats[] = {
 	/* 48 KHz 24-bits per sample. */
 	{
@@ -118,13 +182,19 @@ static const struct nhlt_endp_descriptor max98357_descriptors[] = {
 
 int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels)
 {
-	if (num_channels != 2) {
+	switch (num_channels) {
-		printk(BIOS_ERR, "APL only supports 2CH DMIC array.\n");
+		case 1:
-		return -1;
+			return nhlt_add_endpoints(nhlt, dmic_1ch_descriptors,
-	}
+				ARRAY_SIZE(dmic_1ch_descriptors));
-
+		case 2:
-	return nhlt_add_endpoints(nhlt, dmic_2ch_descriptors,
+			return nhlt_add_endpoints(nhlt, dmic_2ch_descriptors,
 				ARRAY_SIZE(dmic_2ch_descriptors));
+		case 4:
+			return nhlt_add_endpoints(nhlt, dmic_4ch_descriptors,
+				ARRAY_SIZE(dmic_4ch_descriptors));
+		default:
+			return -1;
+	}
 }
 
 int nhlt_soc_add_da7219(struct nhlt *nhlt, int hwlink)