soc/intel/apollolake: add rt5682 NHLT support

Add APIs and required parameters for creating Realtek 5682 SSP
endpoint in NHLT table.

BUG=b:79235534
TEST=check that NHLT table defined is created properly.
With the series merged & required driver support in kernel.
Verify Headset Audio playback.

Change-Id: Ic26a0b881f77af64ba00fd714b08c0f17c0acb3d
Signed-off-by: Naveen Manohar <naveen.m@intel.com>
Reviewed-on: https://review.coreboot.org/26057
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/apollolake/Kconfig

@@ -293,6 +293,13 @@ config NHLT_DA7219
 	help
 	  Include DSP firmware settings for headset codec.
 
+config NHLT_RT5682
+	bool
+	depends on ACPI_NHLT
+	default n
+	help
+	  Include DSP firmware settings for headset codec.
+
 choice
 	prompt "Cache-as-ram implementation"
 	default CAR_CQOS if !SOC_INTEL_GLK

src/soc/intel/apollolake/Makefile.inc

@@ -151,6 +151,7 @@ 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
+RT5682_RENDER_CAPTURE = rt5682-2ch-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)
@@ -172,4 +173,8 @@ cbfs-files-$(CONFIG_NHLT_DA7219) += $(DA7219_RENDER_CAPTURE)
 $(DA7219_RENDER_CAPTURE)-file := $(NHLT_BLOB_PATH)/$(DA7219_RENDER_CAPTURE)
 $(DA7219_RENDER_CAPTURE)-type := raw
 
+cbfs-files-$(CONFIG_NHLT_RT5682) += $(RT5682_RENDER_CAPTURE)
+$(RT5682_RENDER_CAPTURE)-file := $(NHLT_BLOB_PATH)/$(RT5682_RENDER_CAPTURE)
+$(RT5682_RENDER_CAPTURE)-type := raw
+
 endif

src/soc/intel/apollolake/include/soc/nhlt.h

@@ -39,5 +39,6 @@ enum {
 int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels);
 int nhlt_soc_add_max98357(struct nhlt *nhlt, int hwlink);
 int nhlt_soc_add_da7219(struct nhlt *nhlt, int hwlink);
+int nhlt_soc_add_rt5682(struct nhlt *nhlt, int hwlink);
 
 #endif

src/soc/intel/apollolake/nhlt.c

@@ -197,6 +197,53 @@ int nhlt_soc_add_dmic_array(struct nhlt *nhlt, int num_channels)
 	}
 }
 
+/*
+ * The same DSP firmware settings are used for both the capture and
+ * render endpoints.
+*/
+static const struct nhlt_format_config rt5682_formats[] = {
+	/* 48 KHz 24-bits per sample. */
+	{
+		.num_channels = 2,
+		.sample_freq_khz = 48,
+		.container_bits_per_sample = 32,
+		.valid_bits_per_sample = 24,
+		.speaker_mask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT,
+		.settings_file = "rt5682-2ch-48khz-24b.bin",
+	},
+};
+
+/*
+ * The rt5682 just has headphones and a mic. Both the capture and render
+ * endpoints occupy the same virtual slot.
+*/
+static const struct nhlt_endp_descriptor rt5682_descriptors[] = {
+	/* Render Endpoint */
+	{
+		.link = NHLT_LINK_SSP,
+		.device = NHLT_SSP_DEV_I2S,
+		.direction = NHLT_DIR_RENDER,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_SSP,
+		.cfg = &tdm_config,
+		.cfg_size = sizeof(tdm_config),
+		.formats = rt5682_formats,
+		.num_formats = ARRAY_SIZE(rt5682_formats),
+	},
+	/* Capture Endpoint */
+	{
+		.link = NHLT_LINK_SSP,
+		.device = NHLT_SSP_DEV_I2S,
+		.direction = NHLT_DIR_CAPTURE,
+		.vid = NHLT_VID,
+		.did = NHLT_DID_SSP,
+		.cfg = &tdm_config,
+		.cfg_size = sizeof(tdm_config),
+		.formats = rt5682_formats,
+		.num_formats = ARRAY_SIZE(rt5682_formats),
+	},
+};
+
 int nhlt_soc_add_da7219(struct nhlt *nhlt, int hwlink)
 {
 	/* Virtual bus id of SSP links are the hardware port ids proper. */
@@ -210,3 +257,10 @@ int nhlt_soc_add_max98357(struct nhlt *nhlt, int hwlink)
 	return nhlt_add_ssp_endpoints(nhlt, hwlink, max98357_descriptors,
 					ARRAY_SIZE(max98357_descriptors));
 }
+
+int nhlt_soc_add_rt5682(struct nhlt *nhlt, int hwlink)
+{
+        /* Virtual bus id of SSP links are the hardware port ids proper. */
+        return nhlt_add_ssp_endpoints(nhlt, hwlink, rt5682_descriptors,
+                                        ARRAY_SIZE(rt5682_descriptors));
+}