include/sound/sof/dai-intel.h

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

File Facts

System
Linux kernel
Corpus path
include/sound/sof/dai-intel.h
Extension
.h
Size
7354 bytes
Lines
206
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 sof_ipc_dai_ssp_params {
	struct sof_ipc_hdr hdr;
	uint16_t reserved1;
	uint16_t mclk_id;

	uint32_t mclk_rate;	/* mclk frequency in Hz */
	uint32_t fsync_rate;	/* fsync frequency in Hz */
	uint32_t bclk_rate;	/* bclk frequency in Hz */

	/* TDM */
	uint32_t tdm_slots;
	uint32_t rx_slots;
	uint32_t tx_slots;

	/* data */
	uint32_t sample_valid_bits;
	uint16_t tdm_slot_width;
	uint16_t reserved2;	/* alignment */

	/* MCLK */
	uint32_t mclk_direction;

	uint16_t frame_pulse_width;
	uint16_t tdm_per_slot_padding_flag;
	uint32_t clks_control;
	uint32_t quirks;
	uint32_t bclk_delay;	/* guaranteed time (ms) for which BCLK
				 * will be driven, before sending data
				 */
} __packed;

/* HDA Configuration Request - SOF_IPC_DAI_HDA_CONFIG */
struct sof_ipc_dai_hda_params {
	struct sof_ipc_hdr hdr;
	uint32_t link_dma_ch;
	uint32_t rate;
	uint32_t channels;
} __packed;

/* ALH Configuration Request - SOF_IPC_DAI_ALH_CONFIG */
struct sof_ipc_dai_alh_params {
	struct sof_ipc_hdr hdr;
	uint32_t stream_id;
	uint32_t rate;
	uint32_t channels;

	/* reserved for future use */
	uint32_t reserved[13];
} __packed;

/* DMIC Configuration Request - SOF_IPC_DAI_DMIC_CONFIG */

/* This struct is defined per 2ch PDM controller available in the platform.
 * Normally it is sufficient to set the used microphone specific enables to 1
 * and keep other parameters as zero. The customizations are:
 *
 * 1. If a device mixes different microphones types with different polarity
 * and/or the absolute polarity matters the PCM signal from a microphone
 * can be inverted with the controls.
 *
 * 2. If the microphones in a stereo pair do not appear in captured stream
 * in desired order due to board schematics choises they can be swapped with
 * the clk_edge parameter.
 *
 * 3. If PDM bit errors are seen in capture (poor quality) the skew parameter
 * that delays the sampling time of data by half cycles of DMIC source clock
 * can be tried for improvement. However there is no guarantee for this to fix
 * data integrity problems.
 */
struct sof_ipc_dai_dmic_pdm_ctrl {
	struct sof_ipc_hdr hdr;
	uint16_t id;		/**< PDM controller ID */

	uint16_t enable_mic_a;	/**< Use A (left) channel mic (0 or 1)*/
	uint16_t enable_mic_b;	/**< Use B (right) channel mic (0 or 1)*/

	uint16_t polarity_mic_a; /**< Optionally invert mic A signal (0 or 1) */
	uint16_t polarity_mic_b; /**< Optionally invert mic B signal (0 or 1) */

	uint16_t clk_edge;	/**< Optionally swap data clock edge (0 or 1) */
	uint16_t skew;		/**< Adjust PDM data sampling vs. clock (0..15) */

	uint16_t reserved[3];	/**< Make sure the total size is 4 bytes aligned */
} __packed;

/* This struct contains the global settings for all 2ch PDM controllers. The
 * version number used in configuration data is checked vs. version used by
 * device driver src/drivers/dmic.c need to match. It is incremented from
 * initial value 1 if updates done for the to driver would alter the operation
 * of the microphone.

Annotation

Implementation Notes