jcs.org
"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
4 */
5
6#include <dm.h>
7#include <init.h>
8#include <vesa.h>
9#include <video.h>
10#include <asm/cb_sysinfo.h>
11
12static 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 log_msg_ret("save", -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
39static int coreboot_video_probe(struct udevice *dev)
40{
41 struct video_uc_plat *plat = dev_get_uclass_plat(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 if (ll_boot_init())
48 return log_msg_ret("ll", -ENODEV);
49
50 printf("Video: ");
51
52 /* Initialize vesa_mode_info structure */
53 ret = save_vesa_mode(fb, vesa);
54 if (ret) {
55 ret = log_msg_ret("save", ret);
56 goto err;
57 }
58
59 ret = vesa_setup_video_priv(vesa, vesa->phys_base_ptr, uc_priv, plat);
60 if (ret) {
61 ret = log_msg_ret("setup", ret);
62 goto err;
63 }
64
65 printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
66 vesa->bits_per_pixel);
67
68 return 0;
69
70err:
71 printf("No video mode configured in coreboot (err=%d)\n", ret);
72 return ret;
73}
74
75static int coreboot_video_bind(struct udevice *dev)
76{
77 struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
78
79 /* Set the maximum supported resolution */
80 uc_plat->size = 4096 * 2160 * 4;
81 log_debug("%s: Frame buffer size %x\n", __func__, uc_plat->size);
82
83 return 0;
84}
85
86static const struct udevice_id coreboot_video_ids[] = {
87 { .compatible = "coreboot-fb" },
88 { }
89};
90
91U_BOOT_DRIVER(coreboot_video) = {
92 .name = "coreboot_video",
93 .id = UCLASS_VIDEO,
94 .of_match = coreboot_video_ids,
95 .bind = coreboot_video_bind,
96 .probe = coreboot_video_probe,
97};