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

@@ -56,6 +56,8 @@ 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

@@ -199,7 +199,7 @@ 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);
 
 	/* allocate page table buffer */
 	iipc->page_table = rballoc(RZONE_SYS, SOF_MEM_CAPS_RAM,

src/ipc/byt-ipc.c

@@ -221,7 +221,7 @@ 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);
 
 	/* allocate page table buffer */
 	iipc->page_table = rzalloc(RZONE_SYS, SOF_MEM_CAPS_RAM,

src/ipc/cnl-ipc.c

@@ -201,7 +201,7 @@ 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);
 
 	/* allocate page table buffer */
 	iipc->page_table = rballoc(RZONE_SYS, SOF_MEM_CAPS_RAM,

src/ipc/hsw-ipc.c

@@ -216,7 +216,7 @@ 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);
 
 	/* allocate page table buffer */
 	iipc->page_table = rzalloc(RZONE_SYS, SOF_MEM_CAPS_RAM,