drivers/gpu/drm/amd/display/dc/inc/hw/panel_cntl.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/amd/display/dc/inc/hw/panel_cntl.h

Extension

.h

Size

2445 bytes

Lines

73

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

• dc_types.h

Detected Declarations

• struct panel_cntl_backlight_registers
• struct panel_cntl_funcs
• struct panel_cntl_init_data
• struct panel_cntl

Annotated Snippet

struct panel_cntl_backlight_registers {
	unsigned int BL_PWM_CNTL;
	unsigned int BL_PWM_CNTL2;
	unsigned int BL_PWM_PERIOD_CNTL;
	unsigned int LVTMA_PWRSEQ_REF_DIV_BL_PWM_REF_DIV;
	unsigned int PANEL_PWRSEQ_REF_DIV2;
	unsigned int USER_LEVEL;
};

struct panel_cntl_funcs {
	void (*destroy)(struct panel_cntl **panel_cntl);
	uint32_t (*hw_init)(struct panel_cntl *panel_cntl);
	bool (*is_panel_backlight_on)(struct panel_cntl *panel_cntl);
	bool (*is_panel_powered_on)(struct panel_cntl *panel_cntl);
	void (*store_backlight_level)(struct panel_cntl *panel_cntl);
	void (*driver_set_backlight)(struct panel_cntl *panel_cntl,
			uint32_t backlight_pwm_u16_16);
	uint32_t (*get_current_backlight)(struct panel_cntl *panel_cntl);
};

struct panel_cntl_init_data {
	struct dc_context *ctx;
	uint32_t inst;
	uint32_t eng_id;
};

struct panel_cntl {
	const struct panel_cntl_funcs *funcs;
	struct dc_context *ctx;
	uint32_t inst;
	uint32_t pwrseq_inst;
	/* registers setting needs to be saved and restored at InitBacklight */
	struct panel_cntl_backlight_registers stored_backlight_registers;
};

#endif /* DC_PANEL_CNTL_H_ */

Annotation

• Immediate include surface: `dc_types.h`.
• Detected declarations: `struct panel_cntl_backlight_registers`, `struct panel_cntl_funcs`, `struct panel_cntl_init_data`, `struct panel_cntl`.
• 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.