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/*
* VESA frame buffer driver
*
* Copyright (C) 2014 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <pci_rom.h>
#include <video_fb.h>
#include <vbe.h>
/*
* The Graphic Device
*/
GraphicDevice ctfb;
void *video_hw_init(void)
{
GraphicDevice *gdev = &ctfb;
struct udevice *dev;
int bits_per_pixel;
int ret;
printf("Video: ");
if (!ll_boot_init()) {
/*
* If we are running from EFI or coreboot, this driver can't
* work.
*/
printf("Not available (previous bootloader prevents it)\n");
return NULL;
}
if (vbe_get_video_info(gdev)) {
ret = dm_pci_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0, &dev);
if (ret) {
printf("no card detected\n");
return NULL;
}
bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
ret = dm_pci_run_vga_bios(dev, NULL, PCI_ROM_USE_NATIVE |
PCI_ROM_ALLOW_FALLBACK);
bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
if (ret) {
printf("failed to run video BIOS: %d\n", ret);
return NULL;
}
}
if (vbe_get_video_info(gdev)) {
printf("No video mode configured\n");
return NULL;
}
bits_per_pixel = gdev->gdfBytesPP * 8;
sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
bits_per_pixel);
printf("%s\n", gdev->modeIdent);
debug("Frame buffer at %x\n", gdev->pciBase);
return (void *)gdev;
}
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