allow fan in S0ix

Since we have some reports of the system getting hot
along with many forum posts of the same issue
with other vendors, keep the fan on for safety

Signed-off-by: Kieran Levin <ktl@frame.work>

Author: kiram9

common/fan.c

@@ -16,6 +16,8 @@
 #include "printf.h"
 #include "system.h"
 #include "util.h"
+#include "power.h"
+
 
 /* True if we're listening to the thermal control task. False if we're setting
  * things manually. */
@@ -592,6 +594,17 @@ static void pwm_fan_stop(void)
 	 *
 	 * Thermal control may be already disabled if DPTF is used.
 	 */
+
+	/*
+	 * Allow the fan to run in S0ix as we have unknown user reports
+	 * of systems getting warm in this state. Possibly due to windows
+	 * continuing to run CPU heavy tasks for value added features
+	 * causing excessive heat.
+	 */
+	if (power_get_state() == POWER_S0ix ||
+		power_get_state() == POWER_S0S0ix)
+		return;
+
 	pwm_fan_control(0); /* crosbug.com/p/8097 */
 }
 DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, pwm_fan_stop, HOOK_PRIO_DEFAULT);