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 #include <drm/drmP.h>
30 
31 #include "drm_crtc_helper_internal.h"
32 
33 MODULE_AUTHOR("David Airlie, Jesse Barnes");
34 MODULE_DESCRIPTION("DRM KMS helper");
35 MODULE_LICENSE("GPL and additional rights");
36 
37 #if IS_ENABLED(CONFIG_DRM_LOAD_EDID_FIRMWARE)
38 
39 /* Backward compatibility for drm_kms_helper.edid_firmware */
40 static int edid_firmware_set(const char *val, const struct kernel_param *kp)
41 {
42 	DRM_NOTE("drm_kms_firmware.edid_firmware is deprecated, please use drm.edid_firmware intead.\n");
43 
44 	return __drm_set_edid_firmware_path(val);
45 }
46 
47 static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
48 {
49 	return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
50 }
51 
52 static const struct kernel_param_ops edid_firmware_ops = {
53 	.set = edid_firmware_set,
54 	.get = edid_firmware_get,
55 };
56 
57 module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
58 __MODULE_PARM_TYPE(edid_firmware, "charp");
59 MODULE_PARM_DESC(edid_firmware,
60 		 "DEPRECATED. Use drm.edid_firmware module parameter instead.");
61 
62 #endif
63 
64 static int __init drm_kms_helper_init(void)
65 {
66 	int ret;
67 
68 	/* Call init functions from specific kms helpers here */
69 	ret = drm_fb_helper_modinit();
70 	if (ret < 0)
71 		goto out;
72 
73 	ret = drm_dp_aux_dev_init();
74 	if (ret < 0)
75 		goto out;
76 
77 out:
78 	return ret;
79 }
80 
81 static void __exit drm_kms_helper_exit(void)
82 {
83 	/* Call exit functions from specific kms helpers here */
84 	drm_dp_aux_dev_exit();
85 }
86 
87 module_init(drm_kms_helper_init);
88 module_exit(drm_kms_helper_exit);
89