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 */ 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 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 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 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