amdgpu_atpx_handler.c

/*
 * Copyright (c) 2010 Red Hat Inc.
 * Author : Dave Airlie <airlied@redhat.com>
 *
 * Licensed under GPLv2
 *
 * ATPX support for both Intel/ATI
 */
#include <linux/vga_switcheroo.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/pci.h>

#include "amdgpu_acpi.h"

struct amdgpu_atpx_functions {
	bool px_params;
	bool power_cntl;
	bool disp_mux_cntl;
	bool i2c_mux_cntl;
	bool switch_start;
	bool switch_end;
	bool disp_connectors_mapping;
	bool disp_detetion_ports;
};

struct amdgpu_atpx {
	acpi_handle handle;
	struct amdgpu_atpx_functions functions;
};

static struct amdgpu_atpx_priv {
	bool atpx_detected;
	/* handle for device - and atpx */
	acpi_handle dhandle;
	acpi_handle other_handle;
	struct amdgpu_atpx atpx;
} amdgpu_atpx_priv;

struct atpx_verify_interface {
	u16 size;		/* structure size in bytes (includes size field) */
	u16 version;		/* version */
	u32 function_bits;	/* supported functions bit vector */
} __packed;

struct atpx_px_params {
	u16 size;		/* structure size in bytes (includes size field) */
	u32 valid_flags;	/* which flags are valid */
	u32 flags;		/* flags */
} __packed;

struct atpx_power_control {
	u16 size;
	u8 dgpu_state;
} __packed;

struct atpx_mux {
	u16 size;
	u16 mux;
} __packed;

bool amdgpu_has_atpx(void) {
	return amdgpu_atpx_priv.atpx_detected;
}

/**
 * amdgpu_atpx_call - call an ATPX method
 *
 * @handle: acpi handle
 * @function: the ATPX function to execute