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dm: video: Add driver for coreboot framebuffer device

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This adds a DM driver for coreboot framebuffer device.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2016-10-09 04:14:16 -07:00
parent 5f6ad029f3
commit 13b2bfce51
2 changed files with 88 additions and 0 deletions
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9
drivers/video/Kconfig
View file

@ -101,6 +101,15 @@ config VIDCONSOLE_AS_LCD
to update the environment, the breakage may be confusing for users.
This option will be removed around the end of 2016.
config VIDEO_COREBOOT
bool "Enable coreboot framebuffer driver support"
depends on X86 && SYS_COREBOOT
help
Turn on this option to enable a framebuffer driver when U-Boot is
loaded by coreboot where the graphics device is configured by
coreboot already. This can in principle be used with any platform
that coreboot supports.
config VIDEO_VESA
bool "Enable VESA video driver support"
default n

79
drivers/video/coreboot.c Normal file
View file

@ -0,0 +1,79 @@
/*
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <vbe.h>
#include <video.h>
#include <asm/arch/sysinfo.h>
static int save_vesa_mode(struct cb_framebuffer *fb,
struct vesa_mode_info *vesa)
{
/*
* If there is no framebuffer structure, bail out and keep
* running on the serial console.
*/
if (!fb)
return -ENXIO;
vesa->x_resolution = fb->x_resolution;
vesa->y_resolution = fb->y_resolution;
vesa->bits_per_pixel = fb->bits_per_pixel;
vesa->bytes_per_scanline = fb->bytes_per_line;
vesa->phys_base_ptr = fb->physical_address;
vesa->red_mask_size = fb->red_mask_size;
vesa->red_mask_pos = fb->red_mask_pos;
vesa->green_mask_size = fb->green_mask_size;
vesa->green_mask_pos = fb->green_mask_pos;
vesa->blue_mask_size = fb->blue_mask_size;
vesa->blue_mask_pos = fb->blue_mask_pos;
vesa->reserved_mask_size = fb->reserved_mask_size;
vesa->reserved_mask_pos = fb->reserved_mask_pos;
return 0;
}
static int coreboot_video_probe(struct udevice *dev)
{
struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
struct vesa_mode_info *vesa = &mode_info.vesa;
int ret;
printf("Video: ");
/* Initialize vesa_mode_info structure */
ret = save_vesa_mode(fb, vesa);
if (ret)
goto err;
ret = vbe_setup_video_priv(vesa, uc_priv, plat);
if (ret)
goto err;
printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
vesa->bits_per_pixel);
return 0;
err:
printf("No video mode configured in coreboot!\n");
return ret;
}
static const struct udevice_id coreboot_video_ids[] = {
{ .compatible = "coreboot-fb" },
{ }
};
U_BOOT_DRIVER(coreboot_video) = {
.name = "coreboot_video",
.id = UCLASS_VIDEO,
.of_match = coreboot_video_ids,
.probe = coreboot_video_probe,
};