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#include <drm/drmP.h>
  30
  31#include "drm_crtc_helper_internal.h"
  32
  33MODULE_AUTHOR("David Airlie, Jesse Barnes");
  34MODULE_DESCRIPTION("DRM KMS helper");
  35MODULE_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 */
  40static 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
  47static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
  48{
  49        return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
  50}
  51
  52static const struct kernel_param_ops edid_firmware_ops = {
  53        .set = edid_firmware_set,
  54        .get = edid_firmware_get,
  55};
  56
  57module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
  58__MODULE_PARM_TYPE(edid_firmware, "charp");
  59MODULE_PARM_DESC(edid_firmware,
  60                 "DEPRECATED. Use drm.edid_firmware module parameter instead.");
  61
  62#endif
  63
  64static 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
  77out:
  78        return ret;
  79}
  80
  81static 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
  87module_init(drm_kms_helper_init);
  88module_exit(drm_kms_helper_exit);
  89