freebsd-dev/sys/dev/acpica/acpi_video.c
Nate Lawson cbd886065b Tell the BIOS we want to handle brightness switching as well as output
switching.  Don't initialize variables in their declaration.  Reduce stack
usage for device names.  Minor style cleanups.

MFC after:	1 week
2004-11-09 04:41:30 +00:00

899 lines
22 KiB
C

/*-
* Copyright (c) 2002-2003 Taku YAMAMOTO <taku@cent.saitama-u.ac.jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: acpi_vid.c,v 1.4 2003/10/13 10:07:36 taku Exp $
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/power.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
/* ACPI video extension driver. */
struct acpi_video_output {
ACPI_HANDLE handle;
UINT32 adr;
STAILQ_ENTRY(acpi_video_output) vo_next;
struct {
int num;
STAILQ_ENTRY(acpi_video_output) next;
} vo_unit;
int vo_brightness;
int vo_fullpower;
int vo_economy;
int vo_numlevels;
int *vo_levels;
struct sysctl_ctx_list vo_sysctl_ctx;
struct sysctl_oid *vo_sysctl_tree;
};
STAILQ_HEAD(acpi_video_output_queue, acpi_video_output);
struct acpi_video_softc {
device_t device;
ACPI_HANDLE handle;
struct acpi_video_output_queue vid_outputs;
eventhandler_tag vid_pwr_evh;
};
/* interfaces */
static int acpi_video_modevent(struct module*, int, void *);
static int acpi_video_probe(device_t);
static int acpi_video_attach(device_t);
static int acpi_video_detach(device_t);
static int acpi_video_shutdown(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 *);
static struct acpi_video_output *acpi_video_vo_init(UINT32);
static void acpi_video_vo_bind(struct acpi_video_output *, ACPI_HANDLE);
static void acpi_video_vo_destroy(struct acpi_video_output *);
static int acpi_video_vo_check_level(struct acpi_video_output *, int);
static int acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_video_vo_bright_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_video_vo_presets_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_video_vo_levels_sysctl(SYSCTL_HANDLER_ARGS);
/* operations */
static void vid_set_switch_policy(ACPI_HANDLE, UINT32);
static int vid_enum_outputs(ACPI_HANDLE,
void(*)(ACPI_HANDLE, UINT32, void *), void *);
static int vo_get_brightness_levels(ACPI_HANDLE, int **);
static void vo_set_brightness(ACPI_HANDLE, int);
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);
/* events */
#define VID_NOTIFY_SWITCHED 0x80
#define VID_NOTIFY_REPROBE 0x81
/* _DOS (Enable/Disable Output Switching) argument bits */
#define DOS_SWITCH_MASK 3
#define DOS_SWITCH_BY_OSPM 0
#define DOS_SWITCH_BY_BIOS 1
#define DOS_SWITCH_LOCKED 2
#define DOS_BRIGHTNESS_BY_BIOS (1 << 2)
/* _DOD and subdev's _ADR */
#define DOD_DEVID_MASK 0xffff
#define DOD_DEVID_MONITOR 0x0100
#define DOD_DEVID_PANEL 0x0110
#define DOD_DEVID_TV 0x0200
#define DOD_BIOS (1 << 16)
#define DOD_NONVGA (1 << 17)
#define DOD_HEAD_ID_SHIFT 18
#define DOD_HEAD_ID_BITS 3
#define DOD_HEAD_ID_MASK \
(((1 << DOD_HEAD_ID_BITS) - 1) << DOD_HEAD_ID_SHIFT)
/* _BCL related constants */
#define BCL_FULLPOWER 0
#define BCL_ECONOMY 1
/* _DCS (Device Currrent Status) value bits and masks. */
#define DCS_EXISTS (1 << 0)
#define DCS_ACTIVE (1 << 1)
#define DCS_READY (1 << 2)
#define DCS_FUNCTIONAL (1 << 3)
#define DCS_ATTACHED (1 << 4)
/* _DSS (Device Set Status) argument bits and masks. */
#define DSS_INACTIVE 0
#define DSS_ACTIVE (1 << 0)
#define DSS_SETNEXT (1 << 30)
#define DSS_COMMIT (1 << 31)
static device_method_t acpi_video_methods[] = {
DEVMETHOD(device_probe, acpi_video_probe),
DEVMETHOD(device_attach, acpi_video_attach),
DEVMETHOD(device_detach, acpi_video_detach),
DEVMETHOD(device_shutdown, acpi_video_shutdown),
{ 0, 0 }
};
static driver_t acpi_video_driver = {
"acpi_video",
acpi_video_methods,
sizeof(struct acpi_video_softc),
};
static devclass_t acpi_video_devclass;
DRIVER_MODULE(acpi_video, pci, acpi_video_driver, acpi_video_devclass,
acpi_video_modevent, NULL);
MODULE_DEPEND(acpi_video, acpi, 1, 1, 1);
static struct sysctl_ctx_list acpi_video_sysctl_ctx;
static struct sysctl_oid *acpi_video_sysctl_tree;
static struct acpi_video_output_queue lcd_units, crt_units, tv_units,
other_units;
ACPI_SERIAL_DECL(video, "ACPI video");
MALLOC_DEFINE(M_ACPIVIDEO, "acpivideo", "ACPI video extension");
static int
acpi_video_modevent(struct module *mod __unused, int evt, void *cookie __unused)
{
int err;
err = 0;
switch (evt) {
case MOD_LOAD:
sysctl_ctx_init(&acpi_video_sysctl_ctx);
STAILQ_INIT(&lcd_units);
STAILQ_INIT(&crt_units);
STAILQ_INIT(&tv_units);
STAILQ_INIT(&other_units);
break;
case MOD_UNLOAD:
sysctl_ctx_free(&acpi_video_sysctl_ctx);
acpi_video_sysctl_tree = NULL;
break;
default:
err = EINVAL;
}
return (err);
}
static int
acpi_video_probe(device_t dev)
{
ACPI_HANDLE devh, h;
ACPI_OBJECT_TYPE t_dos;
devh = acpi_get_handle(dev);
if (acpi_disabled("video") ||
ACPI_FAILURE(AcpiGetHandle(devh, "_DOD", &h)) ||
ACPI_FAILURE(AcpiGetHandle(devh, "_DOS", &h)) ||
ACPI_FAILURE(AcpiGetType(h, &t_dos)) ||
t_dos != ACPI_TYPE_METHOD)
return (ENXIO);
device_set_desc(dev, "ACPI video extension");
return (0);
}
static int
acpi_video_attach(device_t dev)
{
struct acpi_softc *acpi_sc;
struct acpi_video_softc *sc;
sc = device_get_softc(dev);
acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
if (acpi_sc == NULL)
return (ENXIO);
if (acpi_video_sysctl_tree == NULL) {
acpi_video_sysctl_tree = SYSCTL_ADD_NODE(&acpi_video_sysctl_ctx,
SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
OID_AUTO, "video", CTLFLAG_RD, 0,
"video extension control");
}
sc->device = dev;
sc->handle = acpi_get_handle(dev);
STAILQ_INIT(&sc->vid_outputs);
AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
acpi_video_notify_handler, sc);
sc->vid_pwr_evh = EVENTHANDLER_REGISTER(power_profile_change,
acpi_video_power_profile, sc, 0);
ACPI_SERIAL_BEGIN(video);
acpi_video_bind_outputs(sc);
ACPI_SERIAL_END(video);
/*
* Notify the BIOS that we want to switch both active outputs and
* brightness levels.
*/
vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_OSPM |
DOS_BRIGHTNESS_BY_BIOS);
acpi_video_power_profile(sc);
return (0);
}
static int
acpi_video_detach(device_t dev)
{
struct acpi_video_softc *sc;
struct acpi_video_output *vo, *vn;
sc = device_get_softc(dev);
vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_BIOS);
EVENTHANDLER_DEREGISTER(power_profile_change, sc->vid_pwr_evh);
AcpiRemoveNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
acpi_video_notify_handler);
ACPI_SERIAL_BEGIN(video);
for (vo = STAILQ_FIRST(&sc->vid_outputs); vo != NULL; vo = vn) {
vn = STAILQ_NEXT(vo, vo_next);
acpi_video_vo_destroy(vo);
}
ACPI_SERIAL_END(video);
return (0);
}
static int
acpi_video_shutdown(device_t dev)
{
struct acpi_video_softc *sc;
sc = device_get_softc(dev);
vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_BIOS);
return (0);
}
static void
acpi_video_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
{
struct acpi_video_softc *sc;
struct acpi_video_output *vo, *vo_tmp;
ACPI_HANDLE lasthand;
UINT32 dcs, dss, dss_p;
sc = (struct acpi_video_softc *)context;
switch (notify) {
case VID_NOTIFY_SWITCHED:
dss_p = 0;
lasthand = NULL;
ACPI_SERIAL_BEGIN(video);
STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) {
dss = vo_get_graphics_state(vo->handle);
dcs = vo_get_device_status(vo->handle);
if (!(dcs & DCS_READY))
dss = DSS_INACTIVE;
if (((dcs & DCS_ACTIVE) && dss == DSS_INACTIVE) ||
(!(dcs & DCS_ACTIVE) && dss == DSS_ACTIVE)) {
if (lasthand != NULL)
vo_set_device_state(lasthand, dss_p);
dss_p = dss;
lasthand = vo->handle;
}
}
if (lasthand != NULL)
vo_set_device_state(lasthand, dss_p|DSS_COMMIT);
ACPI_SERIAL_END(video);
break;
case VID_NOTIFY_REPROBE:
ACPI_SERIAL_BEGIN(video);
STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next)
vo->handle = NULL;
acpi_video_bind_outputs(sc);
STAILQ_FOREACH_SAFE(vo, &sc->vid_outputs, vo_next, vo_tmp) {
if (vo->handle == NULL) {
STAILQ_REMOVE(&sc->vid_outputs, vo,
acpi_video_output, vo_next);
acpi_video_vo_destroy(vo);
}
}
ACPI_SERIAL_END(video);
break;
default:
device_printf(sc->device, "unknown notify event 0x%x\n",
notify);
}
}
static void
acpi_video_power_profile(void *context)
{
int state;
struct acpi_video_softc *sc;
struct acpi_video_output *vo;
sc = context;
state = power_profile_get_state();
if (state != POWER_PROFILE_PERFORMANCE &&
state != POWER_PROFILE_ECONOMY)
return;
ACPI_SERIAL_BEGIN(video);
STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) {
if (vo->vo_levels != NULL && vo->vo_brightness == -1)
vo_set_brightness(vo->handle,
state == POWER_PROFILE_ECONOMY ?
vo->vo_economy : vo->vo_fullpower);
}
ACPI_SERIAL_END(video);
}
static void
acpi_video_bind_outputs_subr(ACPI_HANDLE handle, UINT32 adr, void *context)
{
struct acpi_video_softc *sc;
struct acpi_video_output *vo;
ACPI_SERIAL_ASSERT(video);
sc = context;
STAILQ_FOREACH(vo, &sc->vid_outputs, vo_next) {
if (vo->adr == adr) {
acpi_video_vo_bind(vo, handle);
return;
}
}
vo = acpi_video_vo_init(adr);
if (vo != NULL) {
acpi_video_vo_bind(vo, handle);
STAILQ_INSERT_TAIL(&sc->vid_outputs, vo, vo_next);
}
}
static void
acpi_video_bind_outputs(struct acpi_video_softc *sc)
{
ACPI_SERIAL_ASSERT(video);
vid_enum_outputs(sc->handle, acpi_video_bind_outputs_subr, sc);
}
static struct acpi_video_output *
acpi_video_vo_init(UINT32 adr)
{
struct acpi_video_output *vn, *vo, *vp;
int n, x;
char name[8], env[32];
const char *type, *desc;
struct acpi_video_output_queue *voqh;
ACPI_SERIAL_ASSERT(video);
switch (adr & DOD_DEVID_MASK) {
case DOD_DEVID_MONITOR:
desc = "CRT monitor";
type = "crt";
voqh = &crt_units;
break;
case DOD_DEVID_PANEL:
desc = "LCD panel";
type = "lcd";
voqh = &lcd_units;
break;
case DOD_DEVID_TV:
desc = "TV";
type = "tv";
voqh = &tv_units;
break;
default:
desc = "unknown output";
type = "out";
voqh = &other_units;
}
n = 0;
vn = vp = NULL;
STAILQ_FOREACH(vn, voqh, vo_unit.next) {
if (vn->vo_unit.num != n)
break;
vp = vn;
n++;
}
snprintf(name, sizeof(name), "%s%d", type, n);
vo = malloc(sizeof(*vo), M_ACPIVIDEO, M_NOWAIT);
if (vo != NULL) {
vo->handle = NULL;
vo->adr = adr;
vo->vo_unit.num = n;
vo->vo_brightness = -1;
vo->vo_fullpower = -1; /* TODO: override with tunables */
vo->vo_economy = -1;
vo->vo_numlevels = 0;
vo->vo_levels = NULL;
snprintf(env, sizeof(env), "hw.acpi.video.%s.fullpower", name);
if (getenv_int(env, &x))
vo->vo_fullpower = x;
snprintf(env, sizeof(env), "hw.acpi.video.%s.economy", name);
if (getenv_int(env, &x))
vo->vo_economy = x;
sysctl_ctx_init(&vo->vo_sysctl_ctx);
if (vp != NULL)
STAILQ_INSERT_AFTER(voqh, vp, vo, vo_unit.next);
else
STAILQ_INSERT_TAIL(voqh, vo, vo_unit.next);
if (acpi_video_sysctl_tree != NULL)
vo->vo_sysctl_tree =
SYSCTL_ADD_NODE(&vo->vo_sysctl_ctx,
SYSCTL_CHILDREN(acpi_video_sysctl_tree),
OID_AUTO, name, CTLFLAG_RD, 0, desc);
if (vo->vo_sysctl_tree != NULL) {
SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
SYSCTL_CHILDREN(vo->vo_sysctl_tree),
OID_AUTO, "active",
CTLTYPE_INT|CTLFLAG_RW, vo, 0,
acpi_video_vo_active_sysctl, "I",
"current activity of this device");
SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
SYSCTL_CHILDREN(vo->vo_sysctl_tree),
OID_AUTO, "brightness",
CTLTYPE_INT|CTLFLAG_RW, vo, 0,
acpi_video_vo_bright_sysctl, "I",
"current brightness level");
SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
SYSCTL_CHILDREN(vo->vo_sysctl_tree),
OID_AUTO, "fullpower",
CTLTYPE_INT|CTLFLAG_RW, vo,
POWER_PROFILE_PERFORMANCE,
acpi_video_vo_presets_sysctl, "I",
"preset level for full power mode");
SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
SYSCTL_CHILDREN(vo->vo_sysctl_tree),
OID_AUTO, "economy",
CTLTYPE_INT|CTLFLAG_RW, vo,
POWER_PROFILE_ECONOMY,
acpi_video_vo_presets_sysctl, "I",
"preset level for economy mode");
SYSCTL_ADD_PROC(&vo->vo_sysctl_ctx,
SYSCTL_CHILDREN(vo->vo_sysctl_tree),
OID_AUTO, "levels",
CTLTYPE_OPAQUE|CTLFLAG_RD, vo, 0,
acpi_video_vo_levels_sysctl, "I",
"supported brightness levels");
} else
printf("%s: sysctl node creation failed\n", type);
} else
printf("%s: softc allocation failed\n", type);
if (bootverbose) {
printf("found %s(%x)", desc, adr & DOD_DEVID_MASK);
if (adr & DOD_BIOS)
printf(", detectable by BIOS");
if (adr & DOD_NONVGA)
printf(" (not a VGA output)");
printf(", head #%d\n",
(adr & DOD_HEAD_ID_MASK) >> DOD_HEAD_ID_SHIFT);
}
return (vo);
}
static void
acpi_video_vo_bind(struct acpi_video_output *vo, ACPI_HANDLE handle)
{
ACPI_SERIAL_ASSERT(video);
if (vo->vo_levels != NULL)
AcpiOsFree(vo->vo_levels);
vo->handle = handle;
vo->vo_numlevels = vo_get_brightness_levels(handle, &vo->vo_levels);
if (vo->vo_numlevels >= 2) {
if (vo->vo_fullpower == -1
|| acpi_video_vo_check_level(vo, vo->vo_fullpower) != 0)
/* XXX - can't deal with rebinding... */
vo->vo_fullpower = vo->vo_levels[BCL_FULLPOWER];
if (vo->vo_economy == -1
|| acpi_video_vo_check_level(vo, vo->vo_economy) != 0)
/* XXX - see above. */
vo->vo_economy = vo->vo_levels[BCL_ECONOMY];
}
}
static void
acpi_video_vo_destroy(struct acpi_video_output *vo)
{
struct acpi_video_output_queue *voqh;
ACPI_SERIAL_ASSERT(video);
if (vo->vo_sysctl_tree != NULL) {
vo->vo_sysctl_tree = NULL;
sysctl_ctx_free(&vo->vo_sysctl_ctx);
}
if (vo->vo_levels != NULL)
AcpiOsFree(vo->vo_levels);
switch (vo->adr & DOD_DEVID_MASK) {
case DOD_DEVID_MONITOR:
voqh = &crt_units;
break;
case DOD_DEVID_PANEL:
voqh = &lcd_units;
break;
case DOD_DEVID_TV:
voqh = &tv_units;
break;
default:
voqh = &other_units;
}
STAILQ_REMOVE(voqh, vo, acpi_video_output, vo_unit.next);
free(vo, M_ACPIVIDEO);
}
static int
acpi_video_vo_check_level(struct acpi_video_output *vo, int level)
{
int i;
ACPI_SERIAL_ASSERT(video);
if (vo->vo_levels == NULL)
return (ENODEV);
for (i = 0; i < vo->vo_numlevels; i++)
if (vo->vo_levels[i] == level)
return (0);
return (EINVAL);
}
/* ARGSUSED */
static int
acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS)
{
struct acpi_video_output *vo;
int state, err;
vo = (struct acpi_video_output *)arg1;
if (vo->handle == NULL)
return (ENXIO);
ACPI_SERIAL_BEGIN(video);
state = (vo_get_device_status(vo->handle) & DCS_ACTIVE) ? 1 : 0;
err = sysctl_handle_int(oidp, &state, 0, req);
if (err != 0 || req->newptr == NULL)
goto out;
vo_set_device_state(vo->handle,
DSS_COMMIT | (state ? DSS_ACTIVE : DSS_INACTIVE));
out:
ACPI_SERIAL_END(video);
return (err);
}
/* ARGSUSED */
static int
acpi_video_vo_bright_sysctl(SYSCTL_HANDLER_ARGS)
{
struct acpi_video_output *vo;
int level, preset, err;
vo = (struct acpi_video_output *)arg1;
ACPI_SERIAL_BEGIN(video);
if (vo->handle == NULL) {
err = ENXIO;
goto out;
}
if (vo->vo_levels == NULL) {
err = ENODEV;
goto out;
}
preset = (power_profile_get_state() == POWER_PROFILE_ECONOMY) ?
vo->vo_economy : vo->vo_fullpower;
level = vo->vo_brightness;
if (level == -1)
level = preset;
err = sysctl_handle_int(oidp, &level, 0, req);
if (err != 0 || req->newptr == NULL)
goto out;
if (level < -1 || level > 100) {
err = EINVAL;
goto out;
}
if (level != -1 && (err = acpi_video_vo_check_level(vo, level)))
goto out;
vo->vo_brightness = level;
vo_set_brightness(vo->handle, (level == -1) ? preset : level);
out:
ACPI_SERIAL_END(video);
return (err);
}
static int
acpi_video_vo_presets_sysctl(SYSCTL_HANDLER_ARGS)
{
struct acpi_video_output *vo;
int i, level, *preset, err;
err = 0;
vo = (struct acpi_video_output *)arg1;
ACPI_SERIAL_BEGIN(video);
if (vo->handle == NULL) {
err = ENXIO;
goto out;
}
if (vo->vo_levels == NULL) {
err = ENODEV;
goto out;
}
preset = (arg2 == POWER_PROFILE_ECONOMY) ?
&vo->vo_economy : &vo->vo_fullpower;
level = *preset;
err = sysctl_handle_int(oidp, &level, 0, req);
if (err != 0 || req->newptr == NULL)
goto out;
if (level < -1 || level > 100) {
err = EINVAL;
goto out;
}
if (level == -1) {
i = (arg2 == POWER_PROFILE_ECONOMY) ?
BCL_ECONOMY : BCL_FULLPOWER;
level = vo->vo_levels[i];
} else if ((err = acpi_video_vo_check_level(vo, level)) != 0)
goto out;
if (vo->vo_brightness == -1 && (power_profile_get_state() == arg2))
vo_set_brightness(vo->handle, level);
*preset = level;
out:
ACPI_SERIAL_END(video);
return (err);
}
/* ARGSUSED */
static int
acpi_video_vo_levels_sysctl(SYSCTL_HANDLER_ARGS)
{
struct acpi_video_output *vo;
int err;
vo = (struct acpi_video_output *)arg1;
ACPI_SERIAL_BEGIN(video);
if (vo->vo_levels == NULL) {
err = ENODEV;
goto out;
}
if (req->newptr != NULL) {
err = EPERM;
goto out;
}
err = sysctl_handle_opaque(oidp, vo->vo_levels,
vo->vo_numlevels * sizeof(*vo->vo_levels), req);
out:
ACPI_SERIAL_END(video);
return (err);
}
static void
vid_set_switch_policy(ACPI_HANDLE handle, UINT32 policy)
{
ACPI_STATUS status;
status = acpi_SetInteger(handle, "_DOS", policy);
if (ACPI_FAILURE(status))
printf("can't evaluate %s._DOS - %s\n",
acpi_name(handle), AcpiFormatException(status));
}
struct enum_callback_arg {
void (*callback)(ACPI_HANDLE, UINT32, void *);
void *context;
ACPI_OBJECT *dod_pkg;
int count;
};
static ACPI_STATUS
vid_enum_outputs_subr(ACPI_HANDLE handle, UINT32 level __unused,
void *context, void **retp __unused)
{
ACPI_STATUS status;
UINT32 adr, val;
struct enum_callback_arg *argset;
size_t i;
ACPI_SERIAL_ASSERT(video);
argset = context;
status = acpi_GetInteger(handle, "_ADR", &adr);
if (ACPI_FAILURE(status))
return (AE_OK);
for (i = 0; i < argset->dod_pkg->Package.Count; i++) {
if (acpi_PkgInt32(argset->dod_pkg, i, &val) == 0 &&
(val & DOD_DEVID_MASK) == adr) {
argset->callback(handle, val, argset->context);
argset->count++;
}
}
return (AE_OK);
}
static int
vid_enum_outputs(ACPI_HANDLE handle,
void (*callback)(ACPI_HANDLE, UINT32, void *), void *context)
{
ACPI_STATUS status;
ACPI_BUFFER dod_buf;
ACPI_OBJECT *res;
struct enum_callback_arg argset;
ACPI_SERIAL_ASSERT(video);
dod_buf.Length = ACPI_ALLOCATE_BUFFER;
dod_buf.Pointer = NULL;
status = AcpiEvaluateObject(handle, "_DOD", NULL, &dod_buf);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND)
printf("can't evaluate %s._DOD - %s\n",
acpi_name(handle), AcpiFormatException(status));
argset.count = -1;
goto out;
}
res = (ACPI_OBJECT *)dod_buf.Pointer;
if (!ACPI_PKG_VALID(res, 1)) {
printf("evaluation of %s._DOD makes no sense\n",
acpi_name(handle));
argset.count = -1;
goto out;
}
if (callback == NULL) {
argset.count = res->Package.Count;
goto out;
}
argset.callback = callback;
argset.context = context;
argset.dod_pkg = res;
argset.count = 0;
status = AcpiWalkNamespace(ACPI_TYPE_DEVICE, handle, 1,
vid_enum_outputs_subr, &argset, NULL);
if (ACPI_FAILURE(status))
printf("failed walking down %s - %s\n",
acpi_name(handle), AcpiFormatException(status));
out:
if (dod_buf.Pointer != NULL)
AcpiOsFree(dod_buf.Pointer);
return (argset.count);
}
static int
vo_get_brightness_levels(ACPI_HANDLE handle, int **levelp)
{
ACPI_STATUS status;
ACPI_BUFFER bcl_buf;
ACPI_OBJECT *res;
int num, i, n, *levels;
num = 0;
bcl_buf.Length = ACPI_ALLOCATE_BUFFER;
bcl_buf.Pointer = NULL;
status = AcpiEvaluateObject(handle, "_BCL", NULL, &bcl_buf);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND)
printf("can't evaluate %s._BCL - %s\n",
acpi_name(handle), AcpiFormatException(status));
num = -1;
goto out;
}
res = (ACPI_OBJECT *)bcl_buf.Pointer;
if (!ACPI_PKG_VALID(res, 2)) {
printf("evaluation of %s._BCL makes no sense\n",
acpi_name(handle));
num = -1;
goto out;
}
num = res->Package.Count;
if (levelp == NULL)
goto out;
levels = AcpiOsAllocate(num * sizeof(*levels));
if (levels == NULL) {
num = -1;
goto out;
}
for (i = 0, n = 0; i < num; i++)
if (acpi_PkgInt32(res, i, &levels[n]) == 0)
n++;
if (n < 2) {
num = -1;
AcpiOsFree(levels);
} else {
num = n;
*levelp = levels;
}
out:
if (bcl_buf.Pointer != NULL)
AcpiOsFree(bcl_buf.Pointer);
return (num);
}
static void
vo_set_brightness(ACPI_HANDLE handle, int level)
{
ACPI_STATUS status;
status = acpi_SetInteger(handle, "_BCM", level);
if (ACPI_FAILURE(status))
printf("can't evaluate %s._BCM - %s\n",
acpi_name(handle), AcpiFormatException(status));
}
static UINT32
vo_get_device_status(ACPI_HANDLE handle)
{
UINT32 dcs;
ACPI_STATUS status;
dcs = 0;
status = acpi_GetInteger(handle, "_DCS", &dcs);
if (ACPI_FAILURE(status))
printf("can't evaluate %s._DCS - %s\n",
acpi_name(handle), AcpiFormatException(status));
return (dcs);
}
static UINT32
vo_get_graphics_state(ACPI_HANDLE handle)
{
UINT32 dgs;
ACPI_STATUS status;
dgs = 0;
status = acpi_GetInteger(handle, "_DGS", &dgs);
if (ACPI_FAILURE(status))
printf("can't evaluate %s._DGS - %s\n",
acpi_name(handle), AcpiFormatException(status));
return (dgs);
}
static void
vo_set_device_state(ACPI_HANDLE handle, UINT32 state)
{
ACPI_STATUS status;
status = acpi_SetInteger(handle, "_DSS", state);
if (ACPI_FAILURE(status))
printf("can't evaluate %s._DSS - %s\n",
acpi_name(handle), AcpiFormatException(status));
}