From a2a906e47a87acc3acdca0ee2790ff96409b9b46 Mon Sep 17 00:00:00 2001 From: Vladimir Serbinenko Date: Mon, 1 Sep 2014 01:41:37 +0200 Subject: Consolidate intel vga int15 hooks Change-Id: I9366dded98bf15f6da44ce893dd10698ba09fd55 Signed-off-by: Vladimir Serbinenko Reviewed-on: http://review.coreboot.org/6820 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan --- src/drivers/intel/gma/int15.c | 124 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100644 src/drivers/intel/gma/int15.c (limited to 'src/drivers/intel/gma/int15.c') diff --git a/src/drivers/intel/gma/int15.c b/src/drivers/intel/gma/int15.c new file mode 100644 index 0000000000..f21088fec1 --- /dev/null +++ b/src/drivers/intel/gma/int15.c @@ -0,0 +1,124 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007-2009 coresystems GmbH + * Copyright (C) 2012 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include "int15.h" + +static int active_lfp, pfit, display, panel_type; + +int intel_vga_int15_handler(void) +{ + int res = 0; + + printk(BIOS_DEBUG, "%s: AX=%04x BX=%04x CX=%04x DX=%04x\n", + __func__, X86_AX, X86_BX, X86_CX, X86_DX); + + switch (X86_AX) { + case 0x5f34: + /* + * Set Panel Fitting Hook: + * bit 2 = Graphics Stretching + * bit 1 = Text Stretching + * bit 0 = Centering (do not set with bit1 or bit2) + * 0 = video bios default + */ + X86_AX = 0x005f; + X86_CX = pfit; + res = 1; + break; + case 0x5f35: + /* + * Boot Display Device Hook: + * bit 0 = CRT + * bit 1 = TV (eDP) * + * bit 2 = EFP * + * bit 3 = LFP + * bit 4 = CRT2 + * bit 5 = TV2 (eDP) * + * bit 6 = EFP2 * + * bit 7 = LFP2 + */ + X86_AX = 0x005f; + X86_CX = display; + res = 1; + break; + case 0x5f40: /* Boot Panel Type */ + X86_AX = 0x005f; // Success + X86_CL = panel_type; + printk(BIOS_DEBUG, "DISPLAY=%x\n", X86_CL); + break; + case 0x5f51: + /* + * Hook to select active LFP configuration: + * 00h = No LVDS, VBIOS does not enable LVDS + * 01h = Int-LVDS, LFP driven by integrated LVDS decoder + * 02h = SVDO-LVDS, LFP driven by SVDO decoder + * 03h = eDP, LFP Driven by Int-DisplayPort encoder + */ + X86_AX = 0x005f; + X86_CX = active_lfp; + res = 1; + break; + case 0x5f70: + switch ((X86_CX >> 8) & 0xff) { + case 0: + /* Get Mux */ + X86_AX = 0x005f; + X86_CX = 0x0000; + res = 1; + break; + case 1: + /* Set Mux */ + X86_AX = 0x005f; + X86_CX = 0x0000; + res = 1; + break; + case 2: + /* Get SG/Non-SG mode */ + X86_AX = 0x005f; + X86_CX = 0x0000; + res = 1; + break; + default: + /* Interrupt was not handled */ + printk(BIOS_DEBUG, + "Unknown INT15 5f70 function: 0x%02x\n", + ((X86_CX >> 8) & 0xff)); + break; + } + break; + + default: + printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", X86_AX); + break; + } + return res; +} + + +void install_intel_vga_int15_handler(int active_lfp_, int pfit_, int display_, int panel_type_) +{ + active_lfp = active_lfp_; + pfit = pfit_; + display = display_; + panel_type = panel_type_; + mainboard_interrupt_handlers(0x15, &intel_vga_int15_handler); +} -- cgit v1.2.3