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Add support for cycle' and zero' events for LCD brightness control.

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Submitted by:	Daniel Walter (d dot walter at 0x90 dot at) (intial version)
This commit is contained in:
Jung-uk Kim 2010-02-15 19:30:28 +00:00
parent ae6fd00faf
commit aba311e1d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=203935
1 changed files with 43 additions and 14 deletions
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57
sys/dev/acpica/acpi_video.c
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@ -103,8 +103,10 @@ static void vo_set_device_state(ACPI_HANDLE, UINT32);
/* events */
#define VID_NOTIFY_SWITCHED 0x80
#define VID_NOTIFY_REPROBE 0x81
#define VID_NOTIFY_CYC_BRN 0x85
#define VID_NOTIFY_INC_BRN 0x86
#define VID_NOTIFY_DEC_BRN 0x87
#define VID_NOTIFY_ZRO_BRN 0x88
/* _DOS (Enable/Disable Output Switching) argument bits */
#define DOS_SWITCH_MASK 3
@ -645,20 +647,41 @@ acpi_video_vo_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
vo = context;
ACPI_SERIAL_BEGIN(video_output);
if (vo->handle != handle) {
ACPI_SERIAL_END(video_output);
return;
}
if (vo->handle != handle)
goto out;
switch (notify) {
case VID_NOTIFY_CYC_BRN:
if (vo->vo_numlevels <= 3)
goto out;
/* FALLTHROUGH */
case VID_NOTIFY_INC_BRN:
case VID_NOTIFY_DEC_BRN:
case VID_NOTIFY_ZRO_BRN:
if (vo->vo_levels == NULL)
break;
goto out;
level = vo_get_brightness(handle);
if (level < 0)
break;
new_level = level;
goto out;
break;
default:
printf("unknown notify event 0x%x from %s\n",
notify, acpi_name(handle));
goto out;
}
new_level = level;
switch (notify) {
case VID_NOTIFY_CYC_BRN:
for (i = 2; i < vo->vo_numlevels; i++)
if (vo->vo_levels[i] == level) {
new_level = vo->vo_numlevels > i + 1 ?
vo->vo_levels[i + 1] : vo->vo_levels[2];
break;
}
break;
case VID_NOTIFY_INC_BRN:
case VID_NOTIFY_DEC_BRN:
for (i = 0; i < vo->vo_numlevels; i++) {
j = vo->vo_levels[i];
if (notify == VID_NOTIFY_INC_BRN) {
@ -671,15 +694,21 @@ acpi_video_vo_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
new_level = j;
}
}
if (new_level != level) {
vo_set_brightness(handle, new_level);
vo->vo_brightness = new_level;
}
break;
default:
printf("unknown notify event 0x%x from %s\n",
notify, acpi_name(handle));
case VID_NOTIFY_ZRO_BRN:
for (i = 0; i < vo->vo_numlevels; i++)
if (vo->vo_levels[i] == 0) {
new_level = 0;
break;
}
break;
}
if (new_level != level) {
vo_set_brightness(handle, new_level);
vo->vo_brightness = new_level;
}
out:
ACPI_SERIAL_END(video_output);
}