drivers/gpu/drm/i915/display/intel_dsb.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/i915/display/intel_dsb.h

Extension

.h

Size

2440 bytes

Lines

78

Domain

Driver Families

Bucket

drivers/gpu

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.

• 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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• intel_display_reg_defs.h

Detected Declarations

• struct intel_atomic_state
• struct intel_crtc
• struct intel_crtc_state
• struct intel_display
• struct intel_dsb
• enum pipe
• enum intel_dsb_id

Annotated Snippet

#ifndef _INTEL_DSB_H
#define _INTEL_DSB_H

#include <linux/types.h>

#include "intel_display_reg_defs.h"

struct intel_atomic_state;
struct intel_crtc;
struct intel_crtc_state;
struct intel_display;
struct intel_dsb;

enum pipe;

enum intel_dsb_id {
	INTEL_DSB_0,
	INTEL_DSB_1,
	INTEL_DSB_2,

	I915_MAX_DSBS,
};

unsigned int intel_dsb_size(struct intel_dsb *dsb);
unsigned int intel_dsb_head(struct intel_dsb *dsb);
struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state,
				    struct intel_crtc *crtc,
				    enum intel_dsb_id dsb_id,
				    unsigned int max_cmds);
void intel_dsb_finish(struct intel_dsb *dsb);
void intel_dsb_gosub_finish(struct intel_dsb *dsb);
void intel_dsb_cleanup(struct intel_dsb *dsb);
int intel_dsb_exec_time_us(void);
void intel_dsb_reg_write(struct intel_dsb *dsb,
			 intel_reg_t reg, u32 val);
void intel_dsb_reg_write_indexed(struct intel_dsb *dsb,
				 intel_reg_t reg, u32 val);
void intel_dsb_reg_write_masked(struct intel_dsb *dsb,
				intel_reg_t reg, u32 mask, u32 val);
void intel_dsb_noop(struct intel_dsb *dsb, int count);
void intel_dsb_nonpost_start(struct intel_dsb *dsb);
void intel_dsb_nonpost_end(struct intel_dsb *dsb);
void intel_dsb_interrupt(struct intel_dsb *dsb);
void intel_dsb_wait_usec(struct intel_dsb *dsb, int count);
void intel_dsb_wait_vblanks(struct intel_dsb *dsb, int count);
void intel_dsb_wait_for_delayed_vblank(struct intel_atomic_state *state,
				       struct intel_dsb *dsb);
void intel_dsb_wait_scanline_in(struct intel_atomic_state *state,
				struct intel_dsb *dsb,
				int lower, int upper);
void intel_dsb_wait_scanline_out(struct intel_atomic_state *state,
				 struct intel_dsb *dsb,
				 int lower, int upper);
void intel_dsb_vblank_evade(struct intel_atomic_state *state,
			    struct intel_dsb *dsb);
void intel_dsb_poll(struct intel_dsb *dsb,
		    intel_reg_t reg, u32 mask, u32 val,
		    int wait_us, int count);
void intel_dsb_gosub(struct intel_dsb *dsb,
		     struct intel_dsb *sub_dsb);
void intel_dsb_chain(struct intel_atomic_state *state,
		     struct intel_dsb *dsb,
		     struct intel_dsb *chained_dsb,
		     bool wait_for_vblank);

void intel_dsb_commit(struct intel_dsb *dsb);
void intel_dsb_wait(struct intel_dsb *dsb);

void intel_dsb_irq_handler(struct intel_display *display,
			   enum pipe pipe, enum intel_dsb_id dsb_id);

#endif

Annotation

• Immediate include surface: `linux/types.h`, `intel_display_reg_defs.h`.
• Detected declarations: `struct intel_atomic_state`, `struct intel_crtc`, `struct intel_crtc_state`, `struct intel_display`, `struct intel_dsb`, `enum pipe`, `enum intel_dsb_id`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.