Date: Fri, 10 Dec 2004 10:09:21 -0800 From: "Kevin Oberman" <oberman@es.net> To: freebsd-acpi@freebsd.org Subject: Re: S3 on a Sony VGN-A290 Message-ID: <20041210180921.55D275D04@ptavv.es.net> In-Reply-To: Your message of "Fri, 10 Dec 2004 09:45:34 PST." <20041210174534.DF64B5D04@ptavv.es.net>
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> Date: Fri, 10 Dec 2004 09:45:34 -0800
> From: "Kevin Oberman" <oberman@es.net>
> Sender: owner-freebsd-acpi@freebsd.org
>
> This is a multipart MIME message.
>
> --==_Exmh_10231918290
> Content-Type: text/plain; charset=us-ascii
>
> > Date: Fri, 10 Dec 2004 10:16:05 -0700 (MST)
> > From: "M. Warner Losh" <imp@bsdimp.com>
> > Sender: owner-freebsd-acpi@freebsd.org
> >
> > In message: <20041210133615.GA1482@genius.tao.org.uk>
> > Josef Karthauser <joe@freebsd.org> writes:
> > : Grump. I leave my new Sony in S3 and come back to it in the morning to
> > : find that it's run out of battery :/. I thought that S3 was a low
> > : energy state. Anyone else got a similar machine? Is it a problem with
> > : the machine or our ACPI? (I'm running RELENG_5 on it).
> >
> > It is a Low energy state. However, it isn't a NO energy state.
>
> What version are you running? I think that Nate has added support for PCI
> power states to current and will probably be MFCing them soon. I have
> been testing them for about 2 weeks.
>
> You also want to use jhb's acpi_video_dpms patch if the back-light on
> your display does not turn off. This is a BIG power sink. I'll attach
> a copy that is clean against -stable of yesterday (and probably
> today). Be sure that you load acpi_video!
The mail list stripped off the attachment.
And I see that current is running ACPI power code that is updated from
what I have and shows no date to MFC. Still turning off the back-light
is a MUCH bigger power saver than almost anything else you can do.
I am appending the patch this time, so it should make it.
==== //depot/projects/power/sys/dev/acpica/acpi_video.c#2 - /home/john/work/p4/power/sys/dev/acpica/acpi_video.c ====
@@ -1,5 +1,6 @@
/*-
* Copyright (c) 2002-2003 Taku YAMAMOTO <taku@cent.saitama-u.ac.jp>
+ * Copyright (c) 2004 Benjamin Close <Benjamin.Close@clearchain.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -35,10 +36,33 @@
#include <sys/power.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
+#ifdef __i386__
+#include <machine/vm86.h>
+#endif
#include "acpi.h"
#include <dev/acpica/acpivar.h>
+#ifdef __i386__
+#define USE_DPMS
+
+/*
+ * VESA DPMS States
+ */
+#define DPMS_ON 0x00
+#define DPMS_STANDBY 0x01
+#define DPMS_SUSPEND 0x02
+#define DPMS_OFF 0x04
+#define DPMS_REDUCEDON 0x08
+
+#define VBE_DPMS_FUNCTION 0x4F10
+#define VBE_DPMS_GET_SUPPORTED_STATES 0x00
+#define VBE_DPMS_GET_STATE 0x02
+#define VBE_DPMS_SET_STATE 0x01
+#define VBE_MAJORVERSION_MASK 0x0F
+#define VBE_MINORVERSION_MASK 0xF0
+#endif
+
/* ACPI video extension driver. */
struct acpi_video_output {
ACPI_HANDLE handle;
@@ -64,6 +88,10 @@
ACPI_HANDLE handle;
struct acpi_video_output_queue vid_outputs;
eventhandler_tag vid_pwr_evh;
+#ifdef USE_DPMS
+ int vid_dpms_supported_states;
+ int vid_dpms_initial_state;
+#endif
};
/* interfaces */
@@ -72,6 +100,8 @@
static int acpi_video_attach(device_t);
static int acpi_video_detach(device_t);
static int acpi_video_shutdown(device_t);
+static int acpi_video_suspend(device_t);
+static int acpi_video_resume(device_t);
static void acpi_video_notify_handler(ACPI_HANDLE, UINT32, void *);
static void acpi_video_power_profile(void *);
static void acpi_video_bind_outputs(struct acpi_video_softc *);
@@ -93,6 +123,11 @@
static UINT32 vo_get_device_status(ACPI_HANDLE);
static UINT32 vo_get_graphics_state(ACPI_HANDLE);
static void vo_set_device_state(ACPI_HANDLE, UINT32);
+#ifdef USE_DPMS
+static int dpms_get_supported_states(int *);
+static int dpms_get_current_state(int *);
+static int dpms_set_state(int);
+#endif
/* events */
#define VID_NOTIFY_SWITCHED 0x80
@@ -139,6 +174,8 @@
DEVMETHOD(device_attach, acpi_video_attach),
DEVMETHOD(device_detach, acpi_video_detach),
DEVMETHOD(device_shutdown, acpi_video_shutdown),
+ DEVMETHOD(device_resume, acpi_video_resume),
+ DEVMETHOD(device_suspend, acpi_video_suspend),
{ 0, 0 }
};
@@ -245,6 +282,13 @@
acpi_video_power_profile(sc);
+#ifdef USE_DPMS
+ if (dpms_get_supported_states(&sc->vid_dpms_supported_states) == 0)
+ dpms_get_current_state(&sc->vid_dpms_initial_state);
+ else
+ sc->vid_dpms_supported_states = -1;
+#endif
+
return (0);
}
@@ -282,6 +326,32 @@
return (0);
}
+static int
+acpi_video_suspend(device_t dev)
+{
+ struct acpi_video_softc *sc;
+
+ sc = device_get_softc(dev);
+#ifdef USE_DPMS
+ if (sc->vid_dpms_supported_states != -1)
+ dpms_set_state(DPMS_OFF);
+#endif
+ return (0);
+}
+
+static int
+acpi_video_resume(device_t dev)
+{
+ struct acpi_video_softc *sc;
+
+ sc = device_get_softc(dev);
+#ifdef USE_DPMS
+ if (sc->vid_dpms_supported_states != -1)
+ dpms_set_state(sc->vid_dpms_initial_state);
+#endif
+ return (0);
+}
+
static void
acpi_video_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
{
@@ -896,3 +966,49 @@
printf("can't evaluate %s._DSS - %s\n",
acpi_name(handle), AcpiFormatException(status));
}
+
+#ifdef USE_DPMS
+/* XXX: Requires VM86 support in the kernel. */
+static int
+dpms_call_bios(int subfunction, int *bh)
+{
+ struct vm86frame vmf;
+ int error;
+
+ bzero(&vmf, sizeof(vmf));
+ vmf.vmf_ax = VBE_DPMS_FUNCTION;
+ vmf.vmf_bl = subfunction;
+ vmf.vmf_bh = *bh;
+ vmf.vmf_es = 0;
+ vmf.vmf_di = 0;
+ error = vm86_intcall(0x10, &vmf);
+ if (error == 0 && (vmf.vmf_eax & 0xffff) != 0x004f)
+ error = ENXIO;
+ if (error == 0)
+ *bh = vmf.vmf_bh;
+ return (error);
+}
+
+static int
+dpms_get_supported_states(int *states)
+{
+
+ *states = 0;
+ return (dpms_call_bios(VBE_DPMS_GET_SUPPORTED_STATES, states));
+}
+
+static int
+dpms_get_current_state(int *state)
+{
+
+ *state = 0;
+ return (dpms_call_bios(VBE_DPMS_GET_STATE, state));
+}
+
+static int
+dpms_set_state(int state)
+{
+
+ return (dpms_call_bios(VBE_DPMS_SET_STATE, &state));
+}
+#endif
--
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net Phone: +1 510 486-8634
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