Add a very simple dpms(4) driver that uses the VESA BIOS DPMS calls to
turn off the external display during suspend and restore it to its original state on resume. MFC after: 2 weeks
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=182081
@ -11,6 +11,7 @@ MAN= aic.4 \
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cs.4 \
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ct.4 \
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ctau.4 \
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dpms.4 \
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cx.4 \
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ep.4 \
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ex.4 \
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58
share/man/man4/man4.i386/dpms.4
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58
share/man/man4/man4.i386/dpms.4
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@ -0,0 +1,58 @@
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.\" Copyright (c) 2008 Yahoo!, Inc.
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.\" All rights reserved.
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.\" Written by: John Baldwin <jhb@FreeBSD.org>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 23, 2008
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.Dt DPMS 4
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.Os
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.Sh NAME
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.Nm dpms
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.Nd VESA BIOS DPMS driver
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.Sh SYNOPSIS
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.Cd "device dpms"
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.Sh DESCRIPTION
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The
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.Nm
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driver uses the VESA BIOS to manage an external display during suspend and
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resume.
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When the machine suspends,
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the
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.Nm
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driver turns the external display off.
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When the machine resumes,
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it restores the display to its state when the driver was first loaded.
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.Sh SEE ALSO
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.Xr acpi_video 4
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.Sh BUGS
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.Pp
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The VESA BIOS DPMS calls do not provide any way to identify a particular
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display or adapter to manipulate.
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As a result,
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this driver may have unexpected results on systems with multiple displays
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and/or adapters.
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@ -329,6 +329,7 @@ i386/isa/atpic.c optional atpic
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#i386/isa/atpic_vector.s standard
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i386/isa/clock.c optional native
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i386/xen/clock.c optional xen
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i386/isa/dpms.c optional dpms
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i386/isa/elcr.c standard
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i386/isa/elink.c optional ep | ie
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i386/isa/isa.c optional isa
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@ -357,6 +357,8 @@ options VESA
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# Turn on extra debugging checks and output for VESA support.
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options VESA_DEBUG
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device dpms # DPMS suspend & resume via VESA BIOS
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#
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# The Numeric Processing eXtension driver. This is non-optional.
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device npx
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230
sys/i386/isa/dpms.c
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230
sys/i386/isa/dpms.c
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@ -0,0 +1,230 @@
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/*-
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* Copyright (c) 2008 Yahoo!, Inc.
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* All rights reserved.
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* Written by: John Baldwin <jhb@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 2004 Benjamin Close <Benjamin.Close@clearchain.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Support for managing the display via DPMS for suspend/resume.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/libkern.h>
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#include <sys/module.h>
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#include <machine/vm86.h>
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/*
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* VESA DPMS States
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*/
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#define DPMS_ON 0x00
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#define DPMS_STANDBY 0x01
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#define DPMS_SUSPEND 0x02
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#define DPMS_OFF 0x04
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#define DPMS_REDUCEDON 0x08
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#define VBE_DPMS_FUNCTION 0x4F10
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#define VBE_DPMS_GET_SUPPORTED_STATES 0x00
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#define VBE_DPMS_GET_STATE 0x02
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#define VBE_DPMS_SET_STATE 0x01
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#define VBE_MAJORVERSION_MASK 0x0F
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#define VBE_MINORVERSION_MASK 0xF0
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struct dpms_softc {
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int dpms_supported_states;
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int dpms_initial_state;
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};
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static int dpms_attach(device_t);
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static int dpms_detach(device_t);
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static int dpms_get_supported_states(int *);
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static int dpms_get_current_state(int *);
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static void dpms_identify(driver_t *, device_t);
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static int dpms_probe(device_t);
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static int dpms_resume(device_t);
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static int dpms_set_state(int);
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static int dpms_suspend(device_t);
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static device_method_t dpms_methods[] = {
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DEVMETHOD(device_identify, dpms_identify),
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DEVMETHOD(device_probe, dpms_probe),
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DEVMETHOD(device_attach, dpms_attach),
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DEVMETHOD(device_detach, dpms_detach),
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DEVMETHOD(device_suspend, dpms_suspend),
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DEVMETHOD(device_resume, dpms_resume),
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{ 0, 0 }
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};
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static driver_t dpms_driver = {
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"dpms",
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dpms_methods,
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sizeof(struct dpms_softc),
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};
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static devclass_t dpms_devclass;
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DRIVER_MODULE(dpms, vgapci, dpms_driver, dpms_devclass, NULL, NULL);
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static void
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dpms_identify(driver_t *driver, device_t parent)
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{
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/*
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* XXX: The DPMS VBE only allows for manipulating a single
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* monitor, but we don't know which one. Just attach to the
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* first vgapci(4) device we encounter and hope it is the
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* right one.
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*/
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if (devclass_get_device(dpms_devclass, 0) == NULL)
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device_add_child(parent, "dpms", 0);
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}
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static int
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dpms_probe(device_t dev)
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{
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int error, states;
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error = dpms_get_supported_states(&states);
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if (error)
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return (error);
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device_set_desc(dev, "DPMS suspend/resume");
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device_quiet(dev);
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return (BUS_PROBE_DEFAULT);
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}
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static int
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dpms_attach(device_t dev)
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{
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struct dpms_softc *sc;
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int error;
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sc = device_get_softc(dev);
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error = dpms_get_supported_states(&sc->dpms_supported_states);
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if (error)
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return (error);
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error = dpms_get_current_state(&sc->dpms_initial_state);
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return (error);
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}
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static int
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dpms_detach(device_t dev)
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{
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return (0);
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}
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static int
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dpms_suspend(device_t dev)
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{
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dpms_set_state(DPMS_OFF);
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return (0);
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}
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static int
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dpms_resume(device_t dev)
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{
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struct dpms_softc *sc;
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sc = device_get_softc(dev);
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dpms_set_state(sc->dpms_initial_state);
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return (0);
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}
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static int
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dpms_call_bios(int subfunction, int *bh)
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{
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struct vm86frame vmf;
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int error;
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bzero(&vmf, sizeof(vmf));
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vmf.vmf_ax = VBE_DPMS_FUNCTION;
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vmf.vmf_bl = subfunction;
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vmf.vmf_bh = *bh;
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vmf.vmf_es = 0;
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vmf.vmf_di = 0;
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error = vm86_intcall(0x10, &vmf);
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if (error == 0 && (vmf.vmf_eax & 0xffff) != 0x004f)
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error = ENXIO;
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if (error == 0)
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*bh = vmf.vmf_bh;
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return (error);
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}
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static int
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dpms_get_supported_states(int *states)
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{
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*states = 0;
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return (dpms_call_bios(VBE_DPMS_GET_SUPPORTED_STATES, states));
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}
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static int
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dpms_get_current_state(int *state)
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{
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*state = 0;
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return (dpms_call_bios(VBE_DPMS_GET_STATE, state));
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}
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static int
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dpms_set_state(int state)
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{
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return (dpms_call_bios(VBE_DPMS_SET_STATE, &state));
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}
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@ -72,6 +72,7 @@ SUBDIR= ${_3dfx} \
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dcons \
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dcons_crom \
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de \
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${_dpms} \
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${_dpt} \
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${_drm} \
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${_dtrace} \
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@ -377,6 +378,7 @@ _cs= cs
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.if ${MK_CDDL} != "no" || defined(ALL_MODULES)
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_cyclic= cyclic
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.endif
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_dpms= dpms
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_drm= drm
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.if ${MK_CDDL} != "no" || defined(ALL_MODULES)
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_dtrace= dtrace
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9
sys/modules/dpms/Makefile
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9
sys/modules/dpms/Makefile
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# $FreeBSD$
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.PATH: ${.CURDIR}/../../i386/isa
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KMOD= dpms
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SRCS= dpms.c
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SRCS+= bus_if.h device_if.h
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.include <bsd.kmod.mk>
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