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

File Facts

System

Linux kernel

Corpus path

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

Extension

.h

Size

1880 bytes

Lines

54

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/ktime.h
• linux/types.h

Detected Declarations

• struct drm_crtc
• struct drm_display_mode
• struct intel_atomic_state
• struct intel_crtc
• struct intel_crtc_state
• struct intel_vblank_evade_ctx

Annotated Snippet

struct intel_vblank_evade_ctx {
	struct intel_crtc *crtc;
	int min, max, vblank_start;
	bool need_vlv_dsi_wa;
};

int intel_mode_vdisplay(const struct drm_display_mode *mode);
int intel_mode_vblank_start(const struct drm_display_mode *mode);
int intel_mode_vblank_end(const struct drm_display_mode *mode);
int intel_mode_vtotal(const struct drm_display_mode *mode);
int intel_mode_vblank_delay(const struct drm_display_mode *mode);

void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state,
			     const struct intel_crtc_state *new_crtc_state,
			     struct intel_vblank_evade_ctx *evade);
/* must be called with vblank interrupt already enabled! */
int intel_vblank_evade(struct intel_vblank_evade_ctx *evade);

u32 i915_get_vblank_counter(struct drm_crtc *crtc);
u32 g4x_get_vblank_counter(struct drm_crtc *crtc);
bool intel_crtc_get_vblank_timestamp(struct drm_crtc *crtc, int *max_error,
				     ktime_t *vblank_time, bool in_vblank_irq);
int intel_get_crtc_scanline(struct intel_crtc *crtc);
void intel_wait_for_pipe_scanline_stopped(struct intel_crtc *crtc);
void intel_wait_for_pipe_scanline_moving(struct intel_crtc *crtc);
void intel_crtc_update_active_timings(const struct intel_crtc_state *crtc_state,
				      bool vrr_enable);
int intel_crtc_scanline_offset(const struct intel_crtc_state *crtc_state);

const struct intel_crtc_state *
intel_pre_commit_crtc_state(struct intel_atomic_state *state,
			    struct intel_crtc *crtc);

int intel_crtc_vblank_length(const struct intel_crtc_state *crtc_state);

#endif /* __INTEL_VBLANK_H__ */

Annotation

• Immediate include surface: `linux/ktime.h`, `linux/types.h`.
• Detected declarations: `struct drm_crtc`, `struct drm_display_mode`, `struct intel_atomic_state`, `struct intel_crtc`, `struct intel_crtc_state`, `struct intel_vblank_evade_ctx`.
• 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.