mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
ad11dbff74
We cannot use this driver when running from EFI as we have no direct hardware access. In fact coreboot uses a different driver which uses tables provided by coreboot. So far it does not seem possible to use a normal video driver when booting from EFI. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Anatolij Gustschin <agust@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* VESA frame buffer driver
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*
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* Copyright (C) 2014 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <pci_rom.h>
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#include <video_fb.h>
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#include <vbe.h>
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/*
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* The Graphic Device
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*/
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GraphicDevice ctfb;
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void *video_hw_init(void)
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{
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GraphicDevice *gdev = &ctfb;
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int bits_per_pixel;
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pci_dev_t dev;
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int ret;
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printf("Video: ");
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if (!ll_boot_init()) {
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/*
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* If we are running from EFI or coreboot, this driver can't
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* work.
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*/
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printf("Not available (previous bootloader prevents it)\n");
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return NULL;
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}
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if (vbe_get_video_info(gdev)) {
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dev = pci_find_class(PCI_CLASS_DISPLAY_VGA << 8, 0);
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if (dev == -1) {
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printf("no card detected\n");
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return NULL;
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}
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bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
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ret = pci_run_vga_bios(dev, NULL, PCI_ROM_USE_NATIVE |
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PCI_ROM_ALLOW_FALLBACK);
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bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
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if (ret) {
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printf("failed to run video BIOS: %d\n", ret);
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return NULL;
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}
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}
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if (vbe_get_video_info(gdev)) {
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printf("No video mode configured\n");
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return NULL;
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}
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bits_per_pixel = gdev->gdfBytesPP * 8;
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sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
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bits_per_pixel);
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printf("%s\n", gdev->modeIdent);
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debug("Frame buffer at %x\n", gdev->pciBase);
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return (void *)gdev;
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}
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