ipc: set IPC process task to lower priority

IPC process task priority should be lower than pipeline copy task.

Signed-off-by: Pan Xiuli <xiuli.pan@linux.intel.com>

Author: xiulipan

src/include/sof/schedule.h

@@ -57,6 +57,8 @@ struct sof;
 #define TASK_PRI_MED	0
 #define TASK_PRI_HIGH	-20
 
+#define TASK_PRI_IPC	1
+
 /* maximun task time slice in microseconds */
 #define SCHEDULE_TASK_MAX_TIME_SLICE	5000
 

src/ipc/apl-ipc.c

@@ -195,7 +195,7 @@ int platform_ipc_init(struct ipc *ipc)
 
 	/* schedule */
 	schedule_task_init(&_ipc->ipc_task, ipc_process_task, _ipc);
-	schedule_task_config(&_ipc->ipc_task, 0, 0);
+	schedule_task_config(&_ipc->ipc_task, TASK_PRI_IPC, 0);
 
 #ifdef CONFIG_HOST_PTABLE
 	/* allocate page table buffer */

src/ipc/byt-ipc.c

@@ -217,7 +217,7 @@ int platform_ipc_init(struct ipc *ipc)
 
 	/* schedule */
 	schedule_task_init(&_ipc->ipc_task, ipc_process_task, _ipc);
-	schedule_task_config(&_ipc->ipc_task, 0, 0);
+	schedule_task_config(&_ipc->ipc_task, TASK_PRI_IPC, 0);
 
 #ifdef CONFIG_HOST_PTABLE
 	/* allocate page table buffer */

src/ipc/cnl-ipc.c

@@ -196,7 +196,7 @@ int platform_ipc_init(struct ipc *ipc)
 
 	/* schedule */
 	schedule_task_init(&_ipc->ipc_task, ipc_process_task, _ipc);
-	schedule_task_config(&_ipc->ipc_task, 0, 0);
+	schedule_task_config(&_ipc->ipc_task, TASK_PRI_IPC, 0);
 
 #ifdef CONFIG_HOST_PTABLE
 	/* allocate page table buffer */

src/ipc/hsw-ipc.c

@@ -212,7 +212,7 @@ int platform_ipc_init(struct ipc *ipc)
 
 	/* schedule */
 	schedule_task_init(&_ipc->ipc_task, ipc_process_task, _ipc);
-	schedule_task_config(&_ipc->ipc_task, 0, 0);
+	schedule_task_config(&_ipc->ipc_task, TASK_PRI_IPC, 0);
 
 #ifdef CONFIG_HOST_PTABLE
 	/* allocate page table buffer */