FreeBSD-5.3/sys/dev/acpica/acpi_video.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: src/sys/dev/acpica/acpi_video.c,v 1.8 2004/08/13 06:22:20 njl Exp $
*/
#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_ACTIVITY (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 = 0;
switch (evt) {
case MOD_LOAD:
acpi_video_sysctl_tree = NULL;
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);
vid_set_switch_policy(sc->handle, DOS_SWITCH_BY_OSPM);
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 __unused, UINT32 notify,
void *context)
{
struct acpi_video_softc *sc;
struct acpi_video_output *vo, *vo_tmp;
ACPI_HANDLE lasthand = NULL;
UINT32 dcs, dss, dss_p = 0;
sc = context;
switch (notify) {
case VID_NOTIFY_SWITCHED:
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[64], env[128];
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, 128, "hw.acpi.video.%s.fullpower", name);
if (getenv_int(env, &x))
vo->vo_fullpower = x;
snprintf(env, 128, "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 = 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 = 0, i, n, *levels;
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 = 0;
ACPI_STATUS status;
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 = 0;
ACPI_STATUS status;
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));
}