f1a4ae0a48
* Implement reading EDID over software I2C. * Fall back to VGA if no monitor connected for BMC KVM * Copy the linux kernel code and add a bunch of wrapper structs to make it compile. * Convert the EDID to a drm_display_mode, which is understood by the driver. * Properly select HAVE_LINEAR_FRAMEBUFFER and HAVE_VGA_TEXT_FRAMEBUFFER Tested on Supermicro X11SSH-TF using FullHD VGA monitor. Initializes the graphics in about 1 second, which is twice as fast as the VGA Option ROM. The framebuffer is advertised and working in tianocore. Change-Id: I7803566b64158405efc04a39f80a0ec98b44e646 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35726 Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <stdlib.h>
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#include <arch/io.h>
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#include <edid.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <pc80/vga.h>
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#include "../common/aspeed_coreboot.h"
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#include "../common/ast_drv.h"
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static void aspeed_ast2050_set_resources(struct device *dev)
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{
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/* Reserve VGA regions */
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mmio_resource(dev, 3, 0xa0000 >> 10, 0x1ffff >> 10);
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/* Run standard resource set routine */
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pci_dev_set_resources(dev);
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}
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static void aspeed_ast2050_init(struct device *dev)
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{
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struct drm_device drm_dev;
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drm_dev.pdev = dev;
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printk(BIOS_INFO, "ASpeed AST2050: initializing video device\n");
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ast_driver_load(&drm_dev, 0);
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/* Unlock extended configuration registers */
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outb(0x80, 0x3d4); outb(0xa8, 0x3d5);
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/* Set CRT Request Threshold */
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outb(0xa6, 0x3d4); outb(0x2f, 0x3d5);
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outb(0xa7, 0x3d4); outb(0x3f, 0x3d5);
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if (CONFIG(VGA_TEXT_FRAMEBUFFER)) {
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/* Initialize standard VGA text mode */
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vga_io_init();
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vga_textmode_init();
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printk(BIOS_INFO, "ASpeed VGA text mode initialized\n");
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/* if we don't have console, at least print something... */
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vga_line_write(0, "ASpeed VGA text mode initialized");
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} else if (CONFIG(GENERIC_LINEAR_FRAMEBUFFER)) {
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ast_driver_framebuffer_init(&drm_dev, 0);
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printk(BIOS_INFO, "ASpeed high resolution framebuffer initialized\n");
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}
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}
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static struct device_operations aspeed_ast2050_ops = {
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.read_resources = pci_dev_read_resources,
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.set_resources = aspeed_ast2050_set_resources,
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.enable_resources = pci_dev_enable_resources,
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.init = aspeed_ast2050_init,
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.scan_bus = 0,
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};
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static const struct pci_driver aspeed_ast2050_driver __pci_driver = {
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.ops = &aspeed_ast2050_ops,
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.vendor = PCI_VENDOR_ID_ASPEED,
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.device = PCI_DEVICE_ID_ASPEED_AST2050_VGA,
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};
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