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drm: Provide platform module-init macro

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Provide a helper macro to register platform DRM drivers. The new
macro behaves like module_platform_driver() with an additional
test if DRM modesetting has been enabled.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20211222082831.196562-7-javierm@redhat.com
This commit is contained in:
Javier Martinez Canillas 2021-12-22 09:28:27 +01:00
parent 2075a734ed
commit 09f137c320
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1 changed files with 30 additions and 0 deletions
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30
include/drm/drm_module.h
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@ -4,6 +4,7 @@
#define DRM_MODULE_H
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <drm/drm_drv.h>
@ -92,4 +93,33 @@ drm_pci_unregister_driver_if_modeset(struct pci_driver *pci_drv, int 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