sony-laptop: SVS151290S kbd backlight and gfx switch support

SVS151290S series uses handle 0x0163 for keyboard backlight and 0x015B for the graphics switch.
Signed-off-by: Arthur Wirski <awirski@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

drivers/platform/x86/sony-laptop.c

@@ -1255,6 +1255,11 @@ static void sony_nc_notify(struct acpi_device *device, u32 event)
 			real_ev = __sony_nc_gfx_switch_status_get();
 			break;
 
+		case 0x015B:
+			/* Hybrid GFX switching SVS151290S */
+			ev_type = GFX_SWITCH;
+			real_ev = __sony_nc_gfx_switch_status_get();
+			break;
 		default:
 			dprintk("Unknown event 0x%x for handle 0x%x\n",
 					event, handle);
@@ -1353,6 +1358,7 @@ static void sony_nc_function_setup(struct acpi_device *device,
 			break;
 		case 0x0128:
 		case 0x0146:
+		case 0x015B:
 			result = sony_nc_gfx_switch_setup(pf_device, handle);
 			if (result)
 				pr_err("couldn't set up GFX Switch status (%d)\n",
@@ -1375,6 +1381,7 @@ static void sony_nc_function_setup(struct acpi_device *device,
 		case 0x0143:
 		case 0x014b:
 		case 0x014c:
+		case 0x0163:
 			result = sony_nc_kbd_backlight_setup(pf_device, handle);
 			if (result)
 				pr_err("couldn't set up keyboard backlight function (%d)\n",
@@ -1426,6 +1433,7 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
 			break;
 		case 0x0128:
 		case 0x0146:
+		case 0x015B:
 			sony_nc_gfx_switch_cleanup(pd);
 			break;
 		case 0x0131:
@@ -1439,6 +1447,7 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
 		case 0x0143:
 		case 0x014b:
 		case 0x014c:
+		case 0x0163:
 			sony_nc_kbd_backlight_cleanup(pd);
 			break;
 		default:
@@ -1485,6 +1494,7 @@ static void sony_nc_function_resume(void)
 		case 0x0143:
 		case 0x014b:
 		case 0x014c:
+		case 0x0163:
 			sony_nc_kbd_backlight_resume();
 			break;
 		default:
@@ -2390,7 +2400,9 @@ static int __sony_nc_gfx_switch_status_get(void)
 {
 	unsigned int result;
 
-	if (sony_call_snc_handle(gfxs_ctl->handle, 0x0100, &result))
+	if (sony_call_snc_handle(gfxs_ctl->handle,
+				gfxs_ctl->handle == 0x015B ? 0x0000 : 0x0100,
+				&result))
 		return -EIO;
 
 	switch (gfxs_ctl->handle) {
@@ -2400,6 +2412,12 @@ static int __sony_nc_gfx_switch_status_get(void)
 		 */
 		return result & 0x1 ? SPEED : STAMINA;
 		break;
+	case 0x015B:
+		/* 0: discrete GFX (speed)
+		 * 1: integrated GFX (stamina)
+		 */
+		return result & 0x1 ? STAMINA : SPEED;
+		break;
 	case 0x0128:
 		/* it's a more elaborated bitmask, for now:
 		 * 2: integrated GFX (stamina)