src/drivers/intel/fsp1_1/vbt.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2015 Google Inc.
   5  * Copyright (C) 2015 Intel Corp.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <bootmode.h>
  18 #include <cbfs.h>
  19 #include <console/console.h>
  20 #include <drivers/intel/gma/opregion.h>
  21 #include <fsp/ramstage.h>
  22 #include <fsp/util.h>
  23 #include <lib.h>
  24
  25 /* Locate VBT and pass it to FSP GOP */
  26 void load_vbt(uint8_t s3_resume, SILICON_INIT_UPD *params)
  27 {
  28         const optionrom_vbt_t *vbt_data = NULL;
  29         size_t vbt_len;
  30
  31         /* Check boot mode - for S3 resume path VBT loading is not needed */
  32         if (s3_resume) {
  33                 printk(BIOS_DEBUG, "S3 resume do not pass VBT to GOP\n");
  34         } else if (display_init_required()) {
  35                 /* Get VBT data */
  36                 vbt_data = locate_vbt(&vbt_len);
  37                 if (vbt_data != NULL) {
  38                         if (IS_ENABLED(CONFIG_DISPLAY_VBT)) {
  39                                 /* Display the vbt file contents */
  40                                 printk(BIOS_DEBUG, "VBT Data:\n");
  41                                 hexdump(vbt_data, vbt_len);
  42                                 printk(BIOS_DEBUG, "\n");
  43                         }
  44                         printk(BIOS_DEBUG, "Passing VBT to GOP\n");
  45                 } else {
  46                         printk(BIOS_DEBUG, "VBT not found!\n");
  47                 }
  48         } else {
  49                 printk(BIOS_DEBUG, "Not passing VBT to GOP\n");
  50         }
  51         params->GraphicsConfigPtr = (u32)vbt_data;
  52 }