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Implement LCD brightness control notify handler.

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Submitted by:	Daniel Walter(d dot walter at 0x90 dot at) (intial version)
This commit is contained in:
jkim 2010-02-13 02:24:23 +00:00
parent ba6e3a95cb
commit ab2f48857c
1 changed files with 76 additions and 1 deletions
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77
sys/dev/acpica/acpi_video.c
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@ -83,6 +83,7 @@ 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 void acpi_video_vo_notify_handler(ACPI_HANDLE, UINT32, void *);
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);
@ -93,6 +94,7 @@ 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 int vo_get_brightness(ACPI_HANDLE);
static void vo_set_brightness(ACPI_HANDLE, int);
static UINT32 vo_get_device_status(ACPI_HANDLE);
static UINT32 vo_get_graphics_state(ACPI_HANDLE);
@ -101,6 +103,8 @@ static void vo_set_device_state(ACPI_HANDLE, UINT32);
/* events */
#define VID_NOTIFY_SWITCHED 0x80
#define VID_NOTIFY_REPROBE 0x81
#define VID_NOTIFY_INC_BRN 0x86
#define VID_NOTIFY_DEC_BRN 0x87
/* _DOS (Enable/Disable Output Switching) argument bits */
#define DOS_SWITCH_MASK 3
@ -577,6 +581,9 @@ acpi_video_vo_bind(struct acpi_video_output *vo, ACPI_HANDLE handle)
/* XXX - see above. */
vo->vo_economy = vo->vo_levels[BCL_ECONOMY];
}
if (vo->vo_levels != NULL)
AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
acpi_video_vo_notify_handler, vo);
ACPI_SERIAL_END(video_output);
}
@ -590,8 +597,11 @@ acpi_video_vo_destroy(struct acpi_video_output *vo)
vo->vo_sysctl_tree = NULL;
sysctl_ctx_free(&vo->vo_sysctl_ctx);
}
if (vo->vo_levels != NULL)
if (vo->vo_levels != NULL) {
AcpiRemoveNotifyHandler(vo->handle, ACPI_DEVICE_NOTIFY,
acpi_video_vo_notify_handler);
AcpiOsFree(vo->vo_levels);
}
switch (vo->adr & DOD_DEVID_MASK) {
case DOD_DEVID_MONITOR:
@ -627,6 +637,52 @@ acpi_video_vo_check_level(struct acpi_video_output *vo, int level)
return (EINVAL);
}
static void
acpi_video_vo_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
{
struct acpi_video_output *vo;
int i, j, level, new_level;
vo = context;
ACPI_SERIAL_BEGIN(video_output);
if (vo->handle == NULL) {
ACPI_SERIAL_END(video_output);
return;
}
switch (notify) {
case VID_NOTIFY_INC_BRN:
case VID_NOTIFY_DEC_BRN:
if (vo->vo_levels == NULL)
break;
level = vo_get_brightness(vo->handle);
if (level < 0)
break;
new_level = level;
for (i = 0; i < vo->vo_numlevels; i++) {
j = vo->vo_levels[i];
if (notify == VID_NOTIFY_INC_BRN) {
if (j > level &&
(j < new_level || level == new_level))
new_level = j;
} else {
if (j < level &&
(j > new_level || level == new_level))
new_level = j;
}
}
if (new_level != level) {
vo_set_brightness(vo->handle, new_level);
vo->vo_brightness = new_level;
}
break;
default:
printf("%s: unknown notify event 0x%x\n",
acpi_name(vo->handle), notify);
}
ACPI_SERIAL_END(video_output);
}
/* ARGSUSED */
static int
acpi_video_vo_active_sysctl(SYSCTL_HANDLER_ARGS)
@ -900,6 +956,25 @@ vo_get_brightness_levels(ACPI_HANDLE handle, int **levelp)
return (num);
}
static int
vo_get_brightness(ACPI_HANDLE handle)
{
UINT32 level;
ACPI_STATUS status;
ACPI_SERIAL_ASSERT(video_output);
status = acpi_GetInteger(handle, "_BQC", &level);
if (ACPI_FAILURE(status)) {
printf("can't evaluate %s._BQC - %s\n", acpi_name(handle),
AcpiFormatException(status));
return (-1);
}
if (level > 100)
return (-1);
return (level);
}
static void
vo_set_brightness(ACPI_HANDLE handle, int level)
{