disp: msm: sde: update last power event handled correctly

Update triggered power event to last event correctly,
regardless of whether a callback is called.
Add event log to see debugfs clock rate change.

Change-Id: Ifa9c1ffb450f50a3928eb44362723b6d495b2354
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>

msm/sde_power_handle.c

@@ -47,10 +47,10 @@ static void sde_power_event_trigger_locked(struct sde_power_handle *phandle,
 {
 	struct sde_power_event *event;
 
+	phandle->last_event_handled = event_type;
 	list_for_each_entry(event, &phandle->event_list, list) {
 		if (event->event_type & event_type) {
 			event->cb_fnc(event_type, event->usr);
-			phandle->last_event_handled = event_type;
 		}
 	}
 }
@@ -775,6 +775,7 @@ int sde_power_clk_set_rate(struct sde_power_handle *phandle, char *clock_name,
 	if (phandle->last_event_handled & SDE_POWER_EVENT_POST_DISABLE) {
 		pr_debug("invalid power state %u\n",
 				phandle->last_event_handled);
+		SDE_EVT32(phandle->last_event_handled, SDE_EVTLOG_ERROR);
 		mutex_unlock(&phandle->phandle_lock);
 		return -EINVAL;
 	}