drivers/video/coreboot.c

   1 /*
   2  * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <vbe.h>
  10 #include <video.h>
  11 #include <asm/arch/sysinfo.h>
  12
  13 static int save_vesa_mode(struct cb_framebuffer *fb,
  14                           struct vesa_mode_info *vesa)
  15 {
  16         /*
  17          * If there is no framebuffer structure, bail out and keep
  18          * running on the serial console.
  19          */
  20         if (!fb)
  21                 return -ENXIO;
  22
  23         vesa->x_resolution = fb->x_resolution;
  24         vesa->y_resolution = fb->y_resolution;
  25         vesa->bits_per_pixel = fb->bits_per_pixel;
  26         vesa->bytes_per_scanline = fb->bytes_per_line;
  27         vesa->phys_base_ptr = fb->physical_address;
  28         vesa->red_mask_size = fb->red_mask_size;
  29         vesa->red_mask_pos = fb->red_mask_pos;
  30         vesa->green_mask_size = fb->green_mask_size;
  31         vesa->green_mask_pos = fb->green_mask_pos;
  32         vesa->blue_mask_size = fb->blue_mask_size;
  33         vesa->blue_mask_pos = fb->blue_mask_pos;
  34         vesa->reserved_mask_size = fb->reserved_mask_size;
  35         vesa->reserved_mask_pos = fb->reserved_mask_pos;
  36
  37         return 0;
  38 }
  39
  40 static int coreboot_video_probe(struct udevice *dev)
  41 {
  42         struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
  43         struct video_priv *uc_priv = dev_get_uclass_priv(dev);
  44         struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
  45         struct vesa_mode_info *vesa = &mode_info.vesa;
  46         int ret;
  47
  48         printf("Video: ");
  49
  50         /* Initialize vesa_mode_info structure */
  51         ret = save_vesa_mode(fb, vesa);
  52         if (ret)
  53                 goto err;
  54
  55         ret = vbe_setup_video_priv(vesa, uc_priv, plat);
  56         if (ret)
  57                 goto err;
  58
  59         printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
  60                vesa->bits_per_pixel);
  61
  62         return 0;
  63
  64 err:
  65         printf("No video mode configured in coreboot!\n");
  66         return ret;
  67 }
  68
  69 static const struct udevice_id coreboot_video_ids[] = {
  70         { .compatible = "coreboot-fb" },
  71         { }
  72 };
  73
  74 U_BOOT_DRIVER(coreboot_video) = {
  75         .name   = "coreboot_video",
  76         .id     = UCLASS_VIDEO,
  77         .of_match = coreboot_video_ids,
  78         .probe  = coreboot_video_probe,
  79 };