sound/soc/sof/intel/hda-ipc.h

Source file repositories/reference/linux-study-clean/sound/soc/sof/intel/hda-ipc.h

File Facts

System
Linux kernel
Corpus path
sound/soc/sof/intel/hda-ipc.h
Extension
.h
Size
1746 bytes
Lines
57
Domain
Driver Families
Bucket
sound/soc
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

#ifndef __SOF_INTEL_HDA_IPC_H
#define __SOF_INTEL_HDA_IPC_H

/*
 * Primary register, mapped to
 * - DIPCTDR (HIPCIDR) in sideband IPC (cAVS 1.8+)
 * - DIPCT in cAVS 1.5 IPC
 *
 * Secondary register, mapped to:
 * - DIPCTDD (HIPCIDD) in sideband IPC (cAVS 1.8+)
 * - DIPCTE in cAVS 1.5 IPC
 */

/* Common bits in primary register */

/* Reserved for doorbell */
#define HDA_IPC_RSVD_31		BIT(31)
/* Target, 0 - normal message, 1 - compact message(cAVS compatible) */
#define HDA_IPC_MSG_COMPACT	BIT(30)
/* Direction, 0 - request, 1 - response */
#define HDA_IPC_RSP		BIT(29)

#define HDA_IPC_TYPE_SHIFT	24
#define HDA_IPC_TYPE_MASK	GENMASK(28, 24)
#define HDA_IPC_TYPE(x)		((x) << HDA_IPC_TYPE_SHIFT)

#define HDA_IPC_PM_GATE		HDA_IPC_TYPE(0x8U)

/* Command specific payload bits in secondary register */

/* Disable DMA tracing (0 - keep tracing, 1 - to disable DMA trace) */
#define HDA_PM_NO_DMA_TRACE	BIT(4)
/* Prevent clock gating (0 - cg allowed, 1 - DSP clock always on) */
#define HDA_PM_PCG		BIT(3)
/* Prevent power gating (0 - deep power state transitions allowed) */
#define HDA_PM_PPG		BIT(2)
/* Indicates whether streaming is active */
#define HDA_PM_PG_STREAMING	BIT(1)
#define HDA_PM_PG_RSVD		BIT(0)

irqreturn_t cnl_ipc_irq_thread(int irq, void *context);
int cnl_ipc_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg);
void cnl_ipc_dump(struct snd_sof_dev *sdev);
void cnl_ipc4_dump(struct snd_sof_dev *sdev);

#endif

Annotation

Implementation Notes