drivers/video/coreboot.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <vbe.h>
   9 #include <video.h>
  10 #include <asm/arch/sysinfo.h>
  11
  12 static int save_vesa_mode(struct cb_framebuffer *fb,
  13                           struct vesa_mode_info *vesa)
  14 {
  15         /*
  16          * If there is no framebuffer structure, bail out and keep
  17          * running on the serial console.
  18          */
  19         if (!fb)
  20                 return -ENXIO;
  21
  22         vesa->x_resolution = fb->x_resolution;
  23         vesa->y_resolution = fb->y_resolution;
  24         vesa->bits_per_pixel = fb->bits_per_pixel;
  25         vesa->bytes_per_scanline = fb->bytes_per_line;
  26         vesa->phys_base_ptr = fb->physical_address;
  27         vesa->red_mask_size = fb->red_mask_size;
  28         vesa->red_mask_pos = fb->red_mask_pos;
  29         vesa->green_mask_size = fb->green_mask_size;
  30         vesa->green_mask_pos = fb->green_mask_pos;
  31         vesa->blue_mask_size = fb->blue_mask_size;
  32         vesa->blue_mask_pos = fb->blue_mask_pos;
  33         vesa->reserved_mask_size = fb->reserved_mask_size;
  34         vesa->reserved_mask_pos = fb->reserved_mask_pos;
  35
  36         return 0;
  37 }
  38
  39 static int coreboot_video_probe(struct udevice *dev)
  40 {
  41         struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
  42         struct video_priv *uc_priv = dev_get_uclass_priv(dev);
  43         struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
  44         struct vesa_mode_info *vesa = &mode_info.vesa;
  45         int ret;
  46
  47         printf("Video: ");
  48
  49         /* Initialize vesa_mode_info structure */
  50         ret = save_vesa_mode(fb, vesa);
  51         if (ret)
  52                 goto err;
  53
  54         ret = vbe_setup_video_priv(vesa, uc_priv, plat);
  55         if (ret)
  56                 goto err;
  57
  58         printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
  59                vesa->bits_per_pixel);
  60
  61         return 0;
  62
  63 err:
  64         printf("No video mode configured in coreboot!\n");
  65         return ret;
  66 }
  67
  68 static const struct udevice_id coreboot_video_ids[] = {
  69         { .compatible = "coreboot-fb" },
  70         { }
  71 };
  72
  73 U_BOOT_DRIVER(coreboot_video) = {
  74         .name   = "coreboot_video",
  75         .id     = UCLASS_VIDEO,
  76         .of_match = coreboot_video_ids,
  77         .probe  = coreboot_video_probe,
  78 };