1 /*
2  * Copyright © 2015 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  *
23  * Authors:
24  *    Rafael Antognolli <rafael.antognolli@intel.com>
25  *
26  */
27 
28 #include <linux/module.h>
29 
30 #include <drm/drm_print.h>
31 
32 #include "drm_crtc_helper_internal.h"
33 
34 MODULE_AUTHOR("David Airlie, Jesse Barnes");
35 MODULE_DESCRIPTION("DRM KMS helper");
36 MODULE_LICENSE("GPL and additional rights");
37 
38 #if IS_ENABLED(CONFIG_DRM_LOAD_EDID_FIRMWARE)
39 
40 /* Backward compatibility for drm_kms_helper.edid_firmware */
41 static int edid_firmware_set(const char *val, const struct kernel_param *kp)
42 {
43 	DRM_NOTE("drm_kms_helper.edid_firmware is deprecated, please use drm.edid_firmware instead.\n");
44 
45 	return __drm_set_edid_firmware_path(val);
46 }
47 
48 static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
49 {
50 	return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
51 }
52 
53 static const struct kernel_param_ops edid_firmware_ops = {
54 	.set = edid_firmware_set,
55 	.get = edid_firmware_get,
56 };
57 
58 module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
59 __MODULE_PARM_TYPE(edid_firmware, "charp");
60 MODULE_PARM_DESC(edid_firmware,
61 		 "DEPRECATED. Use drm.edid_firmware module parameter instead.");
62 
63 #endif
64 
65 static int __init drm_kms_helper_init(void)
66 {
67 	int ret;
68 
69 	/* Call init functions from specific kms helpers here */
70 	ret = drm_fb_helper_modinit();
71 	if (ret < 0)
72 		goto out;
73 
74 	ret = drm_dp_aux_dev_init();
75 	if (ret < 0)
76 		goto out;
77 
78 out:
79 	return ret;
80 }
81 
82 static void __exit drm_kms_helper_exit(void)
83 {
84 	/* Call exit functions from specific kms helpers here */
85 	drm_dp_aux_dev_exit();
86 }
87 
88 module_init(drm_kms_helper_init);
89 module_exit(drm_kms_helper_exit);
90