LXR linux/drivers/gpu/drm/drm_kms_helper

   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
  34MODULE_AUTHOR("David Airlie, Jesse Barnes");
  35MODULE_DESCRIPTION("DRM KMS helper");
  36MODULE_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 */
  41static int edid_firmware_set(const char *val, const struct kernel_param *kp)
  42{
  43        DRM_NOTE("drm_kms_firmware.edid_firmware is deprecated, please use drm.edid_firmware instead.\n");
  44
  45        return __drm_set_edid_firmware_path(val);
  46}
  47
  48static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
  49{
  50        return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
  51}
  52
  53static const struct kernel_param_ops edid_firmware_ops = {
  54        .set = edid_firmware_set,
  55        .get = edid_firmware_get,
  56};
  57
  58module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
  59__MODULE_PARM_TYPE(edid_firmware, "charp");
  60MODULE_PARM_DESC(edid_firmware,
  61                 "DEPRECATED. Use drm.edid_firmware module parameter instead.");
  62
  63#endif
  64
  65static 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
  78out:
  79        return ret;
  80}
  81
  82static 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
  88module_init(drm_kms_helper_init);
  89module_exit(drm_kms_helper_exit);
  90