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

File Facts

System

Linux kernel

Corpus path

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

Extension

.h

Size

1557 bytes

Lines

51

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct i2c_adapter
• struct intel_display

Annotated Snippet

#ifndef __INTEL_GMBUS_H__
#define __INTEL_GMBUS_H__

#include <linux/types.h>

struct i2c_adapter;
struct intel_display;

#define GMBUS_PIN_DISABLED	0
#define GMBUS_PIN_SSC		1
#define GMBUS_PIN_VGADDC	2
#define GMBUS_PIN_PANEL		3
#define GMBUS_PIN_DPD_CHV	3 /* HDMID_CHV */
#define GMBUS_PIN_DPC		4 /* HDMIC */
#define GMBUS_PIN_DPB		5 /* SDVO, HDMIB */
#define GMBUS_PIN_DPD		6 /* HDMID */
#define GMBUS_PIN_RESERVED	7 /* 7 reserved */
#define GMBUS_PIN_1_BXT		1 /* BXT+ (atom) and CNP+ (big core) */
#define GMBUS_PIN_2_BXT		2
#define GMBUS_PIN_3_BXT		3
#define GMBUS_PIN_4_CNP		4
#define GMBUS_PIN_5_MTP		5
#define GMBUS_PIN_9_TC1_ICP	9
#define GMBUS_PIN_10_TC2_ICP	10
#define GMBUS_PIN_11_TC3_ICP	11
#define GMBUS_PIN_12_TC4_ICP	12
#define GMBUS_PIN_13_TC5_TGP	13
#define GMBUS_PIN_14_TC6_TGP	14

#define GMBUS_NUM_PINS	15 /* including 0 */

int intel_gmbus_setup(struct intel_display *display);
void intel_gmbus_teardown(struct intel_display *display);
bool intel_gmbus_is_valid_pin(struct intel_display *display, unsigned int pin);
int intel_gmbus_output_aksv(struct i2c_adapter *adapter);

struct i2c_adapter *
intel_gmbus_get_adapter(struct intel_display *display, unsigned int pin);
void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter);
void intel_gmbus_reset(struct intel_display *display);

void intel_gmbus_irq_handler(struct intel_display *display);

#endif /* __INTEL_GMBUS_H__ */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct i2c_adapter`, `struct intel_display`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source implementation candidate.

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.