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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <init.h>
#include <log.h>
#include <vbe.h>
#include <video.h>
#include <asm/fsp/fsp_support.h>
#include <asm/mtrr.h>
DECLARE_GLOBAL_DATA_PTR;
struct pixel {
u8 pos;
u8 size;
};
static const struct fsp_framebuffer {
struct pixel red;
struct pixel green;
struct pixel blue;
struct pixel rsvd;
} fsp_framebuffer_format_map[] = {
[pixel_rgbx_8bpc] = { {0, 8}, {8, 8}, {16, 8}, {24, 8} },
[pixel_bgrx_8bpc] = { {16, 8}, {8, 8}, {0, 8}, {24, 8} },
};
static int save_vesa_mode(struct vesa_mode_info *vesa)
{
const struct hob_graphics_info *ginfo;
const struct fsp_framebuffer *fbinfo;
ginfo = fsp_get_graphics_info(gd->arch.hob_list, NULL);
/*
* If there is no graphics info structure, bail out and keep
* running on the serial console.
*
* Note: on some platforms (eg: Braswell), the FSP will not produce
* the graphics info HOB unless you plug some cables to the display
* interface (eg: HDMI) on the board.
*/
if (!ginfo) {
debug("FSP graphics hand-off block not found\n");
return -ENXIO;
}
vesa->x_resolution = ginfo->width;
vesa->y_resolution = ginfo->height;
vesa->bits_per_pixel = 32;
vesa->bytes_per_scanline = ginfo->pixels_per_scanline * 4;
vesa->phys_base_ptr = ginfo->fb_base;
if (ginfo->pixel_format >= pixel_bitmask) {
debug("FSP set unknown framebuffer format: %d\n",
ginfo->pixel_format);
return -EINVAL;
}
fbinfo = &fsp_framebuffer_format_map[ginfo->pixel_format];
vesa->red_mask_size = fbinfo->red.size;
vesa->red_mask_pos = fbinfo->red.pos;
vesa->green_mask_size = fbinfo->green.size;
vesa->green_mask_pos = fbinfo->green.pos;
vesa->blue_mask_size = fbinfo->blue.size;
vesa->blue_mask_pos = fbinfo->blue.pos;
vesa->reserved_mask_size = fbinfo->rsvd.size;
vesa->reserved_mask_pos = fbinfo->rsvd.pos;
return 0;
}
static int fsp_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 vesa_mode_info *vesa = &mode_info.vesa;
int ret;
if (!ll_boot_init())
return 0;
printf("Video: ");
/* Initialize vesa_mode_info structure */
ret = save_vesa_mode(vesa);
if (ret)
goto err;
/*
* The framebuffer base address in the FSP graphics info HOB reflects
* the value assigned by the FSP. After PCI enumeration the framebuffer
* base address may be relocated. Let's get the updated one from device.
*
* For IGD, it seems to be always on BAR2.
*/
vesa->phys_base_ptr = dm_pci_read_bar32(dev, 2);
ret = vbe_setup_video_priv(vesa, uc_priv, plat);
if (ret)
goto err;
mtrr_add_request(MTRR_TYPE_WRCOMB, vesa->phys_base_ptr, 256 << 20);
mtrr_commit(true);
printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
vesa->bits_per_pixel);
return 0;
err:
printf("No video mode configured in FSP!\n");
return ret;
}
static const struct udevice_id fsp_video_ids[] = {
{ .compatible = "fsp-fb" },
{ }
};
U_BOOT_DRIVER(fsp_video) = {
.name = "fsp_video",
.id = UCLASS_VIDEO,
.of_match = fsp_video_ids,
.probe = fsp_video_probe,
};
static struct pci_device_id fsp_video_supported[] = {
{ PCI_DEVICE_CLASS(PCI_CLASS_DISPLAY_VGA << 8, 0xffff00) },
{ },
};
U_BOOT_PCI_DEVICE(fsp_video, fsp_video_supported);
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