From 4c5474fefd2689f69eb075ef21c6e5649ae6f57d Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javierm@redhat.com>
Date: Wed, 22 Dec 2021 09:28:27 +0100
Subject: drm: Provide platform module-init macro
Git-commit: 09f137c320633d08b263c54c0782e91d55a6c09f
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
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
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
include/drm/drm_module.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/include/drm/drm_module.h b/include/drm/drm_module.h
index eb3fd7bcbec9..4db1ae03d9a5 100644
--- a/include/drm/drm_module.h
+++ b/include/drm/drm_module.h
@@ -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
--
2.38.1