drivers/gpu/drm/radeon/radeon_acpi.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/radeon/radeon_acpi.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/radeon/radeon_acpi.h
Extension
.h
Size
21164 bytes
Lines
466
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef RADEON_ACPI_H
#define RADEON_ACPI_H

struct radeon_device;
struct acpi_bus_event;

/* AMD hw uses four ACPI control methods:
 * 1. ATIF
 * ARG0: (ACPI_INTEGER) function code
 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
 * ATIF provides an entry point for the gfx driver to interact with the sbios.
 * The AMD ACPI notification mechanism uses Notify (VGA, 0x81) or a custom
 * notification. Which notification is used as indicated by the ATIF Control
 * Method GET_SYSTEM_PARAMETERS. When the driver receives Notify (VGA, 0x81) or
 * a custom notification it invokes ATIF Control Method GET_SYSTEM_BIOS_REQUESTS
 * to identify pending System BIOS requests and associated parameters. For
 * example, if one of the pending requests is DISPLAY_SWITCH_REQUEST, the driver
 * will perform display device detection and invoke ATIF Control Method
 * SELECT_ACTIVE_DISPLAYS.
 *
 * 2. ATPX
 * ARG0: (ACPI_INTEGER) function code
 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
 * ATPX methods are used on PowerXpress systems to handle mux switching and
 * discrete GPU power control.
 *
 * 3. ATRM
 * ARG0: (ACPI_INTEGER) offset of vbios rom data
 * ARG1: (ACPI_BUFFER) size of the buffer to fill (up to 4K).
 * OUTPUT: (ACPI_BUFFER) output buffer
 * ATRM provides an interfacess to access the discrete GPU vbios image on
 * PowerXpress systems with multiple GPUs.
 *
 * 4. ATCS
 * ARG0: (ACPI_INTEGER) function code
 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
 * ATCS provides an interface to AMD chipset specific functionality.
 *
 */
/* ATIF */
#define ATIF_FUNCTION_VERIFY_INTERFACE                             0x0
/* ARG0: ATIF_FUNCTION_VERIFY_INTERFACE
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - version
 * DWORD - supported notifications mask
 * DWORD - supported functions bit vector
 */
/* Notifications mask */
#       define ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED               (1 << 0)
#       define ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED        (1 << 1)
#       define ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED         (1 << 2)
#       define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED    (1 << 3)
#       define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED   (1 << 4)
#       define ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED          (1 << 5)
#       define ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED                (1 << 6)
#       define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED      (1 << 7)
#       define ATIF_DGPU_DISPLAY_EVENT_SUPPORTED                   (1 << 8)
/* supported functions vector */
#       define ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED               (1 << 0)
#       define ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED            (1 << 1)
#       define ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED              (1 << 2)
#       define ATIF_GET_LID_STATE_SUPPORTED                       (1 << 3)
#       define ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED           (1 << 4)
#       define ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED             (1 << 5)
#       define ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED  (1 << 6)
#       define ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED    (1 << 7)
#       define ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED     (1 << 12)
#       define ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED           (1 << 14)
#       define ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED        (1 << 20)
#define ATIF_FUNCTION_GET_SYSTEM_PARAMETERS                        0x1
/* ARG0: ATIF_FUNCTION_GET_SYSTEM_PARAMETERS
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * DWORD - valid flags mask
 * DWORD - flags
 *
 * OR
 *
 * WORD  - structure size in bytes (includes size field)
 * DWORD - valid flags mask
 * DWORD - flags
 * BYTE  - notify command code
 *
 * flags

Annotation

Implementation Notes