126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/* SPDX-License-Identifier: MIT */
|
|
|
|
#ifndef DRM_MODULE_H
|
|
#define DRM_MODULE_H
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <drm/drm_drv.h>
|
|
|
|
/**
|
|
* DOC: overview
|
|
*
|
|
* This library provides helpers registering DRM drivers during module
|
|
* initialization and shutdown. The provided helpers act like bus-specific
|
|
* module helpers, such as module_pci_driver(), but respect additional
|
|
* parameters that control DRM driver registration.
|
|
*
|
|
* Below is an example of initializing a DRM driver for a device on the
|
|
* PCI bus.
|
|
*
|
|
* .. code-block:: c
|
|
*
|
|
* struct pci_driver my_pci_drv = {
|
|
* };
|
|
*
|
|
* drm_module_pci_driver(my_pci_drv);
|
|
*
|
|
* The generated code will test if DRM drivers are enabled and register
|
|
* the PCI driver my_pci_drv. For more complex module initialization, you
|
|
* can still use module_init() and module_exit() in your driver.
|
|
*/
|
|
|
|
/*
|
|
* PCI drivers
|
|
*/
|
|
|
|
static inline int __init drm_pci_register_driver(struct pci_driver *pci_drv)
|
|
{
|
|
if (drm_firmware_drivers_only())
|
|
return -ENODEV;
|
|
|
|
return pci_register_driver(pci_drv);
|
|
}
|
|
|
|
/**
|
|
* drm_module_pci_driver - Register a DRM driver for PCI-based devices
|
|
* @__pci_drv: the PCI driver structure
|
|
*
|
|
* Registers a DRM driver for devices on the PCI bus. The helper
|
|
* macro behaves like module_pci_driver() but tests the state of
|
|
* drm_firmware_drivers_only(). For more complex module initialization,
|
|
* use module_init() and module_exit() directly.
|
|
*
|
|
* Each module may only use this macro once. Calling it replaces
|
|
* module_init() and module_exit().
|
|
*/
|
|
#define drm_module_pci_driver(__pci_drv) \
|
|
module_driver(__pci_drv, drm_pci_register_driver, pci_unregister_driver)
|
|
|
|
static inline int __init
|
|
drm_pci_register_driver_if_modeset(struct pci_driver *pci_drv, int modeset)
|
|
{
|
|
if (drm_firmware_drivers_only() && modeset == -1)
|
|
return -ENODEV;
|
|
if (modeset == 0)
|
|
return -ENODEV;
|
|
|
|
return pci_register_driver(pci_drv);
|
|
}
|
|
|
|
static inline void __exit
|
|
drm_pci_unregister_driver_if_modeset(struct pci_driver *pci_drv, int modeset)
|
|
{
|
|
pci_unregister_driver(pci_drv);
|
|
}
|
|
|
|
/**
|
|
* drm_module_pci_driver_if_modeset - Register a DRM driver for PCI-based devices
|
|
* @__pci_drv: the PCI driver structure
|
|
* @__modeset: an additional parameter that disables the driver
|
|
*
|
|
* This macro is deprecated and only provided for existing drivers. For
|
|
* new drivers, use drm_module_pci_driver().
|
|
*
|
|
* Registers a DRM driver for devices on the PCI bus. The helper macro
|
|
* behaves like drm_module_pci_driver() with an additional driver-specific
|
|
* flag. If __modeset is 0, the driver has been disabled, if __modeset is
|
|
* -1 the driver state depends on the global DRM state. For all other
|
|
* values, the PCI driver has been enabled. The default should be -1.
|
|
*/
|
|
#define drm_module_pci_driver_if_modeset(__pci_drv, __modeset) \
|
|
module_driver(__pci_drv, drm_pci_register_driver_if_modeset, \
|
|
drm_pci_unregister_driver_if_modeset, __modeset)
|
|
|
|
/*
|
|
* Platform drivers
|
|
*/
|
|
|
|
static inline int __init
|
|
drm_platform_driver_register(struct platform_driver *platform_drv)
|
|
{
|
|
if (drm_firmware_drivers_only())
|
|
return -ENODEV;
|
|
|
|
return platform_driver_register(platform_drv);
|
|
}
|
|
|
|
/**
|
|
* drm_module_platform_driver - Register a DRM driver for platform devices
|
|
* @__platform_drv: the platform driver structure
|
|
*
|
|
* Registers a DRM driver for devices on the platform bus. The helper
|
|
* macro behaves like module_platform_driver() but tests the state of
|
|
* drm_firmware_drivers_only(). For more complex module initialization,
|
|
* use module_init() and module_exit() directly.
|
|
*
|
|
* Each module may only use this macro once. Calling it replaces
|
|
* module_init() and module_exit().
|
|
*/
|
|
#define drm_module_platform_driver(__platform_drv) \
|
|
module_driver(__platform_drv, drm_platform_driver_register, \
|
|
platform_driver_unregister)
|
|
|
|
#endif
|