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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. to update the environment, the breakage may be confusing for users.
This option will be removed around the end of 2016. 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 config VIDEO_VESA
bool "Enable VESA video driver support" bool "Enable VESA video driver support"
default n 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,
};