gpu/drm/drm_kms_helper_common.c

0001 /*
0002  * Copyright © 2015 Intel Corporation
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice (including the next
0012  * paragraph) shall be included in all copies or substantial portions of the
0013  * Software.
0014  *
0015  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0016  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0017  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0018  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0019  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
0020  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
0021  * IN THE SOFTWARE.
0022  *
0023  * Authors:
0024  *    Rafael Antognolli <rafael.antognolli@intel.com>
0025  *
0026  */
0027
0028 #include <linux/module.h>
0029
0030 #include <drm/drm_edid.h>
0031 #include <drm/drm_print.h>
0032
0033 #include "drm_crtc_helper_internal.h"
0034
0035 MODULE_AUTHOR("David Airlie, Jesse Barnes");
0036 MODULE_DESCRIPTION("DRM KMS helper");
0037 MODULE_LICENSE("GPL and additional rights");
0038
0039 #if IS_ENABLED(CONFIG_DRM_LOAD_EDID_FIRMWARE)
0040
0041 /* Backward compatibility for drm_kms_helper.edid_firmware */
0042 static int edid_firmware_set(const char *val, const struct kernel_param *kp)
0043 {
0044     DRM_NOTE("drm_kms_helper.edid_firmware is deprecated, please use drm.edid_firmware instead.\n");
0045
0046     return __drm_set_edid_firmware_path(val);
0047 }
0048
0049 static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
0050 {
0051     return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
0052 }
0053
0054 static const struct kernel_param_ops edid_firmware_ops = {
0055     .set = edid_firmware_set,
0056     .get = edid_firmware_get,
0057 };
0058
0059 module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
0060 __MODULE_PARM_TYPE(edid_firmware, "charp");
0061 MODULE_PARM_DESC(edid_firmware,
0062          "DEPRECATED. Use drm.edid_firmware module parameter instead.");
0063
0064 #endif