include/sound/intel-nhlt.h

Source file repositories/reference/linux-study-clean/include/sound/intel-nhlt.h

File Facts

System
Linux kernel
Corpus path
include/sound/intel-nhlt.h
Extension
.h
Size
4108 bytes
Lines
200
Domain
Driver Families
Bucket
include/sound
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct wav_fmt {
	u16 fmt_tag;
	u16 channels;
	u32 samples_per_sec;
	u32 avg_bytes_per_sec;
	u16 block_align;
	u16 bits_per_sample;
	u16 cb_size;
} __packed;

struct wav_fmt_ext {
	struct wav_fmt fmt;
	union samples {
		u16 valid_bits_per_sample;
		u16 samples_per_block;
		u16 reserved;
	} sample;
	u32 channel_mask;
	u8 sub_fmt[16];
} __packed;

struct nhlt_specific_cfg {
	u32 size;
	u8 caps[];
} __packed;

struct nhlt_fmt_cfg {
	struct wav_fmt_ext fmt_ext;
	struct nhlt_specific_cfg config;
} __packed;

struct nhlt_fmt {
	u8 fmt_count;
	struct nhlt_fmt_cfg fmt_config[];
} __packed;

struct nhlt_endpoint {
	u32  length;
	u8   linktype;
	u8   instance_id;
	u16  vendor_id;
	u16  device_id;
	u16  revision_id;
	u32  subsystem_id;
	u8   device_type;
	u8   direction;
	u8   virtual_bus_id;
	struct nhlt_specific_cfg config;
} __packed;

struct nhlt_acpi_table {
	struct acpi_table_header header;
	u8 endpoint_count;
	struct nhlt_endpoint desc[];
} __packed;

struct nhlt_resource_desc  {
	u32 extra;
	u16 flags;
	u64 addr_spc_gra;
	u64 min_addr;
	u64 max_addr;
	u64 addr_trans_offset;
	u64 length;
} __packed;

#define MIC_ARRAY_2CH 2
#define MIC_ARRAY_4CH 4

struct nhlt_device_specific_config {
	u8 virtual_slot;
	u8 config_type;
} __packed;

struct nhlt_dmic_array_config {
	struct nhlt_device_specific_config device_config;
	u8 array_type;
} __packed;

struct nhlt_vendor_dmic_array_config {
	struct nhlt_dmic_array_config dmic_config;
	u8 nb_mics;
	/* TODO add vendor mic config */
} __packed;

enum {
	NHLT_CONFIG_TYPE_GENERIC = 0,
	NHLT_CONFIG_TYPE_MIC_ARRAY = 1
};

Annotation

Implementation Notes