1 /* $NetBSD: drm_kms_helper_common.c,v 1.2 2021/12/18 23:44:57 riastradh Exp $ */
2
3 /*
4 * Copyright © 2015 Intel Corporation
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
23 * IN THE SOFTWARE.
24 *
25 * Authors:
26 * Rafael Antognolli <rafael.antognolli@intel.com>
27 *
28 */
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: drm_kms_helper_common.c,v 1.2 2021/12/18 23:44:57 riastradh Exp $");
32
33 #include <linux/module.h>
34
35 #include <drm/drm_print.h>
36
37 #include "drm_crtc_helper_internal.h"
38
39 MODULE_AUTHOR("David Airlie, Jesse Barnes");
40 MODULE_DESCRIPTION("DRM KMS helper");
41 MODULE_LICENSE("GPL and additional rights");
42
43 #if IS_ENABLED(CONFIG_DRM_LOAD_EDID_FIRMWARE)
44
45 /* Backward compatibility for drm_kms_helper.edid_firmware */
edid_firmware_set(const char * val,const struct kernel_param * kp)46 static int edid_firmware_set(const char *val, const struct kernel_param *kp)
47 {
48 DRM_NOTE("drm_kms_helper.edid_firmware is deprecated, please use drm.edid_firmware instead.\n");
49
50 return __drm_set_edid_firmware_path(val);
51 }
52
edid_firmware_get(char * buffer,const struct kernel_param * kp)53 static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
54 {
55 return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
56 }
57
58 static const struct kernel_param_ops edid_firmware_ops = {
59 .set = edid_firmware_set,
60 .get = edid_firmware_get,
61 };
62
63 module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
64 __MODULE_PARM_TYPE(edid_firmware, "charp");
65 MODULE_PARM_DESC(edid_firmware,
66 "DEPRECATED. Use drm.edid_firmware module parameter instead.");
67
68 #endif
69
drm_kms_helper_init(void)70 static int __init drm_kms_helper_init(void)
71 {
72 int ret;
73
74 /* Call init functions from specific kms helpers here */
75 ret = drm_fb_helper_modinit();
76 if (ret < 0)
77 goto out;
78
79 ret = drm_dp_aux_dev_init();
80 if (ret < 0)
81 goto out;
82
83 out:
84 return ret;
85 }
86
drm_kms_helper_exit(void)87 static void __exit drm_kms_helper_exit(void)
88 {
89 /* Call exit functions from specific kms helpers here */
90 drm_dp_aux_dev_exit();
91 }
92
93 module_init(drm_kms_helper_init);
94 module_exit(drm_kms_helper_exit);
95