/* SPDX-License-Identifier: GPL-2.0-only */ /* * apple-gmux.h - microcontroller built into dual GPU MacBook Pro & Mac Pro * Copyright (C) 2015 Lukas Wunner <[email protected]> */ #ifndef LINUX_APPLE_GMUX_H #define LINUX_APPLE_GMUX_H #include <linux/acpi.h> #include <linux/io.h> #include <linux/pnp.h> #define GMUX_ACPI_HID … /* * gmux port offsets. Many of these are not yet used, but may be in the * future, and it's useful to have them documented here anyhow. */ #define GMUX_PORT_VERSION_MAJOR … #define GMUX_PORT_VERSION_MINOR … #define GMUX_PORT_VERSION_RELEASE … #define GMUX_PORT_SWITCH_DISPLAY … #define GMUX_PORT_SWITCH_GET_DISPLAY … #define GMUX_PORT_INTERRUPT_ENABLE … #define GMUX_PORT_INTERRUPT_STATUS … #define GMUX_PORT_SWITCH_DDC … #define GMUX_PORT_SWITCH_EXTERNAL … #define GMUX_PORT_SWITCH_GET_EXTERNAL … #define GMUX_PORT_DISCRETE_POWER … #define GMUX_PORT_MAX_BRIGHTNESS … #define GMUX_PORT_BRIGHTNESS … #define GMUX_PORT_VALUE … #define GMUX_PORT_READ … #define GMUX_PORT_WRITE … #define GMUX_MMIO_PORT_SELECT … #define GMUX_MMIO_COMMAND_SEND … #define GMUX_MMIO_READ … #define GMUX_MMIO_WRITE … #define GMUX_MIN_IO_LEN … enum apple_gmux_type { … }; #if IS_ENABLED(CONFIG_APPLE_GMUX) static inline bool apple_gmux_is_indexed(unsigned long iostart) { … } static inline bool apple_gmux_is_mmio(unsigned long iostart) { … } /** * apple_gmux_detect() - detect if gmux is built into the machine * * @pnp_dev: Device to probe or NULL to use the first matching device * @type_ret: Returns (by reference) the apple_gmux_type of the device * * Detect if a supported gmux device is present by actually probing it. * This avoids the false positives returned on some models by * apple_gmux_present(). * * Return: %true if a supported gmux ACPI device is detected and the kernel * was configured with CONFIG_APPLE_GMUX, %false otherwise. */ static inline bool apple_gmux_detect(struct pnp_dev *pnp_dev, enum apple_gmux_type *type_ret) { … } /** * apple_gmux_present() - check if gmux ACPI device is present * * Drivers may use this to activate quirks specific to dual GPU MacBook Pros * and Mac Pros, e.g. for deferred probing, runtime pm and backlight. * * Return: %true if gmux ACPI device is present and the kernel was configured * with CONFIG_APPLE_GMUX, %false otherwise. */ static inline bool apple_gmux_present(void) { … } #else /* !CONFIG_APPLE_GMUX */ static inline bool apple_gmux_present(void) { return false; } static inline bool apple_gmux_detect(struct pnp_dev *pnp_dev, bool *indexed_ret) { return false; } #endif /* !CONFIG_APPLE_GMUX */ #endif /* LINUX_APPLE_GMUX_H */
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