a2a906e47a
Change-Id: I9366dded98bf15f6da44ce893dd10698ba09fd55 Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com> Reviewed-on: http://review.coreboot.org/6820 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2007-2009 coresystems GmbH
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* Copyright (C) 2012 Google Inc.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <x86emu/x86emu.h>
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#include <arch/interrupt.h>
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#include "int15.h"
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static int active_lfp, pfit, display, panel_type;
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int intel_vga_int15_handler(void)
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{
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int res = 0;
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printk(BIOS_DEBUG, "%s: AX=%04x BX=%04x CX=%04x DX=%04x\n",
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__func__, X86_AX, X86_BX, X86_CX, X86_DX);
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switch (X86_AX) {
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case 0x5f34:
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/*
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* Set Panel Fitting Hook:
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* bit 2 = Graphics Stretching
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* bit 1 = Text Stretching
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* bit 0 = Centering (do not set with bit1 or bit2)
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* 0 = video bios default
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*/
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X86_AX = 0x005f;
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X86_CX = pfit;
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res = 1;
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break;
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case 0x5f35:
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/*
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* Boot Display Device Hook:
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* bit 0 = CRT
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* bit 1 = TV (eDP) *
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* bit 2 = EFP *
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* bit 3 = LFP
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* bit 4 = CRT2
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* bit 5 = TV2 (eDP) *
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* bit 6 = EFP2 *
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* bit 7 = LFP2
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*/
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X86_AX = 0x005f;
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X86_CX = display;
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res = 1;
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break;
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case 0x5f40: /* Boot Panel Type */
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X86_AX = 0x005f; // Success
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X86_CL = panel_type;
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printk(BIOS_DEBUG, "DISPLAY=%x\n", X86_CL);
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break;
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case 0x5f51:
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/*
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* Hook to select active LFP configuration:
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* 00h = No LVDS, VBIOS does not enable LVDS
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* 01h = Int-LVDS, LFP driven by integrated LVDS decoder
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* 02h = SVDO-LVDS, LFP driven by SVDO decoder
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* 03h = eDP, LFP Driven by Int-DisplayPort encoder
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*/
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X86_AX = 0x005f;
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X86_CX = active_lfp;
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res = 1;
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break;
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case 0x5f70:
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switch ((X86_CX >> 8) & 0xff) {
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case 0:
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/* Get Mux */
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X86_AX = 0x005f;
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X86_CX = 0x0000;
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res = 1;
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break;
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case 1:
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/* Set Mux */
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X86_AX = 0x005f;
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X86_CX = 0x0000;
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res = 1;
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break;
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case 2:
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/* Get SG/Non-SG mode */
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X86_AX = 0x005f;
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X86_CX = 0x0000;
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res = 1;
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break;
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default:
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/* Interrupt was not handled */
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printk(BIOS_DEBUG,
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"Unknown INT15 5f70 function: 0x%02x\n",
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((X86_CX >> 8) & 0xff));
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break;
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}
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break;
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default:
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printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", X86_AX);
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break;
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}
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return res;
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}
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void install_intel_vga_int15_handler(int active_lfp_, int pfit_, int display_, int panel_type_)
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{
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active_lfp = active_lfp_;
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pfit = pfit_;
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display = display_;
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panel_type = panel_type_;
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mainboard_interrupt_handlers(0x15, &intel_vga_int15_handler);
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}
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