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

File Facts

System

Linux kernel

Corpus path

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

Extension

.h

Size

1169 bytes

Lines

40

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_limits.h

Detected Declarations

• struct intel_atomic_state
• struct intel_connector
• struct intel_crtc_state
• struct intel_link_bw_limits

Annotated Snippet

struct intel_link_bw_limits {
	u8 link_dsc_pipes;
	u8 bpp_limit_reached_pipes;
	/* in 1/16 bpp units */
	int max_bpp_x16[I915_MAX_PIPES];
};

void intel_link_bw_init_limits(struct intel_atomic_state *state,
			       struct intel_link_bw_limits *limits);
int intel_link_bw_reduce_bpp(struct intel_atomic_state *state,
			     struct intel_link_bw_limits *limits,
			     u8 pipe_mask,
			     const char *reason);
bool intel_link_bw_compute_pipe_bpp(struct intel_crtc_state *crtc_state);
bool intel_link_bw_set_bpp_limit_for_pipe(struct intel_atomic_state *state,
					  const struct intel_link_bw_limits *old_limits,
					  struct intel_link_bw_limits *new_limits,
					  enum pipe pipe);
int intel_link_bw_atomic_check(struct intel_atomic_state *state,
			       struct intel_link_bw_limits *new_limits);
void intel_link_bw_connector_debugfs_add(struct intel_connector *connector);

#endif

Annotation

• Immediate include surface: `linux/types.h`, `intel_display_limits.h`.
• Detected declarations: `struct intel_atomic_state`, `struct intel_connector`, `struct intel_crtc_state`, `struct intel_link_bw_limits`.
• 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.