mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
19987c9834
When booting from coreboot we need this driver for the video to work. Update the driver to be usable on any board. The driver disables itself if it sees that is not booted from coreboot. Signed-off-by: Simon Glass <sjg@chromium.org>
86 lines
2 KiB
C
86 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <init.h>
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#include <vbe.h>
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#include <video.h>
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#include <asm/cb_sysinfo.h>
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static int save_vesa_mode(struct cb_framebuffer *fb,
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struct vesa_mode_info *vesa)
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{
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/*
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* If there is no framebuffer structure, bail out and keep
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* running on the serial console.
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*/
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if (!fb)
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return log_msg_ret("save", -ENXIO);
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vesa->x_resolution = fb->x_resolution;
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vesa->y_resolution = fb->y_resolution;
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vesa->bits_per_pixel = fb->bits_per_pixel;
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vesa->bytes_per_scanline = fb->bytes_per_line;
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vesa->phys_base_ptr = fb->physical_address;
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vesa->red_mask_size = fb->red_mask_size;
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vesa->red_mask_pos = fb->red_mask_pos;
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vesa->green_mask_size = fb->green_mask_size;
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vesa->green_mask_pos = fb->green_mask_pos;
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vesa->blue_mask_size = fb->blue_mask_size;
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vesa->blue_mask_pos = fb->blue_mask_pos;
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vesa->reserved_mask_size = fb->reserved_mask_size;
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vesa->reserved_mask_pos = fb->reserved_mask_pos;
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return 0;
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}
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static int coreboot_video_probe(struct udevice *dev)
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{
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struct video_uc_plat *plat = dev_get_uclass_plat(dev);
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struct video_priv *uc_priv = dev_get_uclass_priv(dev);
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struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
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struct vesa_mode_info *vesa = &mode_info.vesa;
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int ret;
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if (ll_boot_init())
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return log_msg_ret("ll", -ENODEV);
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printf("Video: ");
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/* Initialize vesa_mode_info structure */
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ret = save_vesa_mode(fb, vesa);
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if (ret) {
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ret = log_msg_ret("save", ret);
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goto err;
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}
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ret = vbe_setup_video_priv(vesa, uc_priv, plat);
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if (ret) {
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ret = log_msg_ret("setup", ret);
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goto err;
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}
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printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
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vesa->bits_per_pixel);
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return 0;
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err:
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printf("No video mode configured in coreboot (err=%d)\n", ret);
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return ret;
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}
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static const struct udevice_id coreboot_video_ids[] = {
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{ .compatible = "coreboot-fb" },
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{ }
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};
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U_BOOT_DRIVER(coreboot_video) = {
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.name = "coreboot_video",
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.id = UCLASS_VIDEO,
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.of_match = coreboot_video_ids,
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.probe = coreboot_video_probe,
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};
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