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sony-laptop: notify userspace of GFX switch position changes 

Some Vaios come with both integrated and discrete graphics, plus a
switch for choosing one of the two. When the switch position is changed,
a notification is generated.

Signed-off-by: Marco Chiappero <marco@absence.it>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Marco Chiappero 2012-06-09 13:18:09 +09:00 committed by Matthew Garrett
parent 4069d6f86b
commit bb384b5295
1 changed files with 20 additions and 1 deletions
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21
drivers/platform/x86/sony-laptop.c
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@ -1174,7 +1174,8 @@ static int sony_nc_hotkeys_decode(u32 event, unsigned int handle)
*/
enum event_types {
HOTKEY = 1,
KILLSWITCH
KILLSWITCH,
GFX_SWITCH
};
static void sony_nc_notify(struct acpi_device *device, u32 event)
{
@ -1230,6 +1231,24 @@ static void sony_nc_notify(struct acpi_device *device, u32 event)
break;
case 0x0128:
case 0x0146:
/* Hybrid GFX switching */
sony_call_snc_handle(handle, 0x0000, &result);
dprintk("GFX switch event received (reason: %s)\n",
(result & 0x01) ?
"switch change" : "unknown");
/* verify the switch state
* 1: discrete GFX
* 0: integrated GFX
*/
sony_call_snc_handle(handle, 0x0100, &result);
ev_type = GFX_SWITCH;
real_ev = result & 0xff;
break;
default:
dprintk("Unknown event 0x%x for handle 0x%x\n",
event, handle);