dp: Disable DP task deadline recalculation from userspace DP thread

Disable DP tasks deadline recalculation from DP threads running in
userspace.

Recalculation requires information about other DP threads, which
is not available from a DP thread operating in userspace. This
is a temporary change until a better solution is found.

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>

Author: softwarecki

src/schedule/zephyr_dp_schedule.c

@@ -405,10 +405,13 @@ static void dp_thread_fn(void *p1, void *p2, void *p3)
 	(void)p2;
 	(void)p3;
 	struct task_dp_pdata *task_pdata = task->priv_data;
+	struct scheduler_dp_data *dp_sch = NULL;
 	unsigned int lock_key;
 	enum task_state state;
 	bool task_stop;
-	struct scheduler_dp_data *dp_sch = scheduler_get_data(SOF_SCHEDULE_DP);
+
+	if (!(task->flags & K_USER))
+		dp_sch = scheduler_get_data(SOF_SCHEDULE_DP);
 
 	do {
 		/*
@@ -454,7 +457,8 @@ static void dp_thread_fn(void *p1, void *p2, void *p3)
 		 * TODO: it should be for all tasks, for all cores
 		 * currently its limited to current core only
 		 */
-		scheduler_dp_recalculate(dp_sch, false);
+		if (dp_sch)
+			scheduler_dp_recalculate(dp_sch, false);
 
 		scheduler_dp_unlock(lock_key);
 	} while (!task_stop);