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887532ca7c
Some ThinkPad systems have a power-saving feature that turns off HDMI audio device in Windows, but NVidia Linux driver does not support this feature. As a result, HDMI audio will not work on Linux. A BIOS workaround is added with an OEM_OSI string "Linux-Lenovo-NV-HDMI-Audio" to power on NVidia HDMI audio when booting. The form of the OEM _OSI strings is defined by each OEMs and is discussed in Documentation/acpi/osi.txt. Signed-off-by: Alex Hung <alex.hung@canonical.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
519 lines
13 KiB
C
519 lines
13 KiB
C
/*
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* osi.c - _OSI implementation
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*
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* Copyright (C) 2016 Intel Corporation
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* Author: Lv Zheng <lv.zheng@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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/* Uncomment next line to get verbose printout */
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/* #define DEBUG */
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#define pr_fmt(fmt) "ACPI: " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/acpi.h>
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#include <linux/dmi.h>
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#include <linux/platform_data/x86/apple.h>
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#include "internal.h"
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#define OSI_STRING_LENGTH_MAX 64
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#define OSI_STRING_ENTRIES_MAX 16
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struct acpi_osi_entry {
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char string[OSI_STRING_LENGTH_MAX];
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bool enable;
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};
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static struct acpi_osi_config {
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u8 default_disabling;
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unsigned int linux_enable:1;
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unsigned int linux_dmi:1;
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unsigned int linux_cmdline:1;
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unsigned int darwin_enable:1;
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unsigned int darwin_dmi:1;
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unsigned int darwin_cmdline:1;
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} osi_config;
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static struct acpi_osi_config osi_config;
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static struct acpi_osi_entry
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osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
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{"Module Device", true},
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{"Processor Device", true},
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{"3.0 _SCP Extensions", true},
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{"Processor Aggregator Device", true},
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/*
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* Linux-Dell-Video is used by BIOS to disable RTD3 for NVidia graphics
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* cards as RTD3 is not supported by drivers now. Systems with NVidia
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* cards will hang without RTD3 disabled.
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*
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* Once NVidia drivers officially support RTD3, this _OSI strings can
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* be removed if both new and old graphics cards are supported.
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*/
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{"Linux-Dell-Video", true},
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/*
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* Linux-Lenovo-NV-HDMI-Audio is used by BIOS to power on NVidia's HDMI
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* audio device which is turned off for power-saving in Windows OS.
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* This power management feature observed on some Lenovo Thinkpad
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* systems which will not be able to output audio via HDMI without
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* a BIOS workaround.
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*/
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{"Linux-Lenovo-NV-HDMI-Audio", true},
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};
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static u32 acpi_osi_handler(acpi_string interface, u32 supported)
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{
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if (!strcmp("Linux", interface)) {
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pr_notice_once(FW_BUG
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"BIOS _OSI(Linux) query %s%s\n",
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osi_config.linux_enable ? "honored" : "ignored",
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osi_config.linux_cmdline ? " via cmdline" :
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osi_config.linux_dmi ? " via DMI" : "");
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}
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if (!strcmp("Darwin", interface)) {
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pr_notice_once(
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"BIOS _OSI(Darwin) query %s%s\n",
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osi_config.darwin_enable ? "honored" : "ignored",
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osi_config.darwin_cmdline ? " via cmdline" :
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osi_config.darwin_dmi ? " via DMI" : "");
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}
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return supported;
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}
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void __init acpi_osi_setup(char *str)
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{
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struct acpi_osi_entry *osi;
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bool enable = true;
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int i;
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if (!acpi_gbl_create_osi_method)
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return;
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if (str == NULL || *str == '\0') {
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pr_info("_OSI method disabled\n");
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acpi_gbl_create_osi_method = FALSE;
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return;
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}
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if (*str == '!') {
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str++;
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if (*str == '\0') {
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/* Do not override acpi_osi=!* */
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if (!osi_config.default_disabling)
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osi_config.default_disabling =
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ACPI_DISABLE_ALL_VENDOR_STRINGS;
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return;
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} else if (*str == '*') {
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osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS;
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for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
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osi = &osi_setup_entries[i];
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osi->enable = false;
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}
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return;
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} else if (*str == '!') {
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osi_config.default_disabling = 0;
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return;
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}
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enable = false;
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}
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for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
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osi = &osi_setup_entries[i];
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if (!strcmp(osi->string, str)) {
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osi->enable = enable;
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break;
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} else if (osi->string[0] == '\0') {
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osi->enable = enable;
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strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
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break;
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}
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}
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}
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static void __init __acpi_osi_setup_darwin(bool enable)
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{
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osi_config.darwin_enable = !!enable;
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if (enable) {
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acpi_osi_setup("!");
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acpi_osi_setup("Darwin");
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} else {
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acpi_osi_setup("!!");
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acpi_osi_setup("!Darwin");
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}
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}
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static void __init acpi_osi_setup_darwin(bool enable)
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{
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/* Override acpi_osi_dmi_blacklisted() */
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osi_config.darwin_dmi = 0;
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osi_config.darwin_cmdline = 1;
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__acpi_osi_setup_darwin(enable);
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}
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/*
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* The story of _OSI(Linux)
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*
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* From pre-history through Linux-2.6.22, Linux responded TRUE upon a BIOS
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* OSI(Linux) query.
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*
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* Unfortunately, reference BIOS writers got wind of this and put
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* OSI(Linux) in their example code, quickly exposing this string as
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* ill-conceived and opening the door to an un-bounded number of BIOS
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* incompatibilities.
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*
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* For example, OSI(Linux) was used on resume to re-POST a video card on
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* one system, because Linux at that time could not do a speedy restore in
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* its native driver. But then upon gaining quick native restore
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* capability, Linux has no way to tell the BIOS to skip the time-consuming
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* POST -- putting Linux at a permanent performance disadvantage. On
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* another system, the BIOS writer used OSI(Linux) to infer native OS
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* support for IPMI! On other systems, OSI(Linux) simply got in the way of
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* Linux claiming to be compatible with other operating systems, exposing
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* BIOS issues such as skipped device initialization.
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*
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* So "Linux" turned out to be a really poor chose of OSI string, and from
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* Linux-2.6.23 onward we respond FALSE.
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*
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* BIOS writers should NOT query _OSI(Linux) on future systems. Linux will
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* complain on the console when it sees it, and return FALSE. To get Linux
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* to return TRUE for your system will require a kernel source update to
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* add a DMI entry, or boot with "acpi_osi=Linux"
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*/
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static void __init __acpi_osi_setup_linux(bool enable)
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{
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osi_config.linux_enable = !!enable;
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if (enable)
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acpi_osi_setup("Linux");
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else
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acpi_osi_setup("!Linux");
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}
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static void __init acpi_osi_setup_linux(bool enable)
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{
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/* Override acpi_osi_dmi_blacklisted() */
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osi_config.linux_dmi = 0;
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osi_config.linux_cmdline = 1;
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__acpi_osi_setup_linux(enable);
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}
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/*
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* Modify the list of "OS Interfaces" reported to BIOS via _OSI
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*
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* empty string disables _OSI
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* string starting with '!' disables that string
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* otherwise string is added to list, augmenting built-in strings
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*/
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static void __init acpi_osi_setup_late(void)
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{
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struct acpi_osi_entry *osi;
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char *str;
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int i;
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acpi_status status;
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if (osi_config.default_disabling) {
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status = acpi_update_interfaces(osi_config.default_disabling);
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if (ACPI_SUCCESS(status))
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pr_info("Disabled all _OSI OS vendors%s\n",
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osi_config.default_disabling ==
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ACPI_DISABLE_ALL_STRINGS ?
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" and feature groups" : "");
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}
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for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
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osi = &osi_setup_entries[i];
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str = osi->string;
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if (*str == '\0')
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break;
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if (osi->enable) {
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status = acpi_install_interface(str);
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if (ACPI_SUCCESS(status))
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pr_info("Added _OSI(%s)\n", str);
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} else {
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status = acpi_remove_interface(str);
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if (ACPI_SUCCESS(status))
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pr_info("Deleted _OSI(%s)\n", str);
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}
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}
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}
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static int __init osi_setup(char *str)
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{
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if (str && !strcmp("Linux", str))
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acpi_osi_setup_linux(true);
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else if (str && !strcmp("!Linux", str))
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acpi_osi_setup_linux(false);
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else if (str && !strcmp("Darwin", str))
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acpi_osi_setup_darwin(true);
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else if (str && !strcmp("!Darwin", str))
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acpi_osi_setup_darwin(false);
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else
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acpi_osi_setup(str);
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return 1;
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}
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__setup("acpi_osi=", osi_setup);
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bool acpi_osi_is_win8(void)
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{
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return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
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}
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EXPORT_SYMBOL(acpi_osi_is_win8);
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static void __init acpi_osi_dmi_darwin(void)
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{
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pr_notice("DMI detected to setup _OSI(\"Darwin\"): Apple hardware\n");
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osi_config.darwin_dmi = 1;
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__acpi_osi_setup_darwin(true);
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}
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static void __init acpi_osi_dmi_linux(bool enable,
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const struct dmi_system_id *d)
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{
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pr_notice("DMI detected to setup _OSI(\"Linux\"): %s\n", d->ident);
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osi_config.linux_dmi = 1;
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__acpi_osi_setup_linux(enable);
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}
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static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
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{
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acpi_osi_dmi_linux(true, d);
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return 0;
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}
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static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
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{
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pr_notice("DMI detected: %s\n", d->ident);
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acpi_osi_setup("!Windows 2006");
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acpi_osi_setup("!Windows 2006 SP1");
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acpi_osi_setup("!Windows 2006 SP2");
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return 0;
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}
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static int __init dmi_disable_osi_win7(const struct dmi_system_id *d)
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{
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pr_notice("DMI detected: %s\n", d->ident);
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acpi_osi_setup("!Windows 2009");
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return 0;
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}
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static int __init dmi_disable_osi_win8(const struct dmi_system_id *d)
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{
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pr_notice("DMI detected: %s\n", d->ident);
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acpi_osi_setup("!Windows 2012");
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return 0;
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}
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/*
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* Linux default _OSI response behavior is determined by this DMI table.
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*
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* Note that _OSI("Linux")/_OSI("Darwin") determined here can be overridden
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* by acpi_osi=!Linux/acpi_osi=!Darwin command line options.
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*/
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static const struct dmi_system_id acpi_osi_dmi_table[] __initconst = {
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{
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.callback = dmi_disable_osi_vista,
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.ident = "Fujitsu Siemens",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
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DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
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},
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},
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{
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/*
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* There have a NVIF method in MSI GX723 DSDT need call by Nvidia
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* driver (e.g. nouveau) when user press brightness hotkey.
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* Currently, nouveau driver didn't do the job and it causes there
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* have a infinite while loop in DSDT when user press hotkey.
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* We add MSI GX723's dmi information to this table for workaround
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* this issue.
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* Will remove MSI GX723 from the table after nouveau grows support.
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*/
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.callback = dmi_disable_osi_vista,
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.ident = "MSI GX723",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
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DMI_MATCH(DMI_PRODUCT_NAME, "GX723"),
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},
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},
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{
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.callback = dmi_disable_osi_vista,
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.ident = "Sony VGN-NS10J_S",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"),
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},
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},
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{
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.callback = dmi_disable_osi_vista,
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.ident = "Sony VGN-SR290J",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"),
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},
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},
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{
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.callback = dmi_disable_osi_vista,
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.ident = "VGN-NS50B_L",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"),
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},
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},
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{
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.callback = dmi_disable_osi_vista,
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.ident = "VGN-SR19XN",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"),
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},
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},
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{
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.callback = dmi_disable_osi_vista,
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.ident = "Toshiba Satellite L355",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
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DMI_MATCH(DMI_PRODUCT_VERSION, "Satellite L355"),
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},
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},
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{
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.callback = dmi_disable_osi_win7,
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.ident = "ASUS K50IJ",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"),
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},
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},
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{
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.callback = dmi_disable_osi_vista,
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.ident = "Toshiba P305D",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"),
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},
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},
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{
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.callback = dmi_disable_osi_vista,
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.ident = "Toshiba NB100",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
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DMI_MATCH(DMI_PRODUCT_NAME, "NB100"),
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},
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},
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/*
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* The wireless hotkey does not work on those machines when
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* returning true for _OSI("Windows 2012")
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*/
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{
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.callback = dmi_disable_osi_win8,
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.ident = "Dell Inspiron 7737",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7737"),
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},
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},
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{
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.callback = dmi_disable_osi_win8,
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.ident = "Dell Inspiron 7537",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
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},
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},
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{
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.callback = dmi_disable_osi_win8,
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.ident = "Dell Inspiron 5437",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5437"),
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},
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},
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{
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.callback = dmi_disable_osi_win8,
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.ident = "Dell Inspiron 3437",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3437"),
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},
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},
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{
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.callback = dmi_disable_osi_win8,
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.ident = "Dell Vostro 3446",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3446"),
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},
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},
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{
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.callback = dmi_disable_osi_win8,
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.ident = "Dell Vostro 3546",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3546"),
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},
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},
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/*
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* BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
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* Linux ignores it, except for the machines enumerated below.
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*/
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/*
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* Without this this EEEpc exports a non working WMI interface, with
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* this it exports a working "good old" eeepc_laptop interface, fixing
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* both brightness control, and rfkill not working.
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*/
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{
|
|
.callback = dmi_enable_osi_linux,
|
|
.ident = "Asus EEE PC 1015PX",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
static __init void acpi_osi_dmi_blacklisted(void)
|
|
{
|
|
dmi_check_system(acpi_osi_dmi_table);
|
|
|
|
/* Enable _OSI("Darwin") for Apple platforms. */
|
|
if (x86_apple_machine)
|
|
acpi_osi_dmi_darwin();
|
|
}
|
|
|
|
int __init early_acpi_osi_init(void)
|
|
{
|
|
acpi_osi_dmi_blacklisted();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init acpi_osi_init(void)
|
|
{
|
|
acpi_install_interface_handler(acpi_osi_handler);
|
|
acpi_osi_setup_late();
|
|
|
|
return 0;
|
|
}
|