drm: etnaviv: track current execution state

Add tracking of the current execution state (iow, active GPU pipe).

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drivers/gpu/drm/etnaviv/etnaviv_buffer.c

@@ -261,6 +261,7 @@ void etnaviv_buffer_queue(struct etnaviv_gpu *gpu, unsigned int event,
 
 		if (gpu->switch_context) {
 			etnaviv_cmd_select_pipe(buffer, cmdbuf->exec_state);
+			gpu->exec_state = cmdbuf->exec_state;
 			gpu->switch_context = false;
 		}
 

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

@@ -628,6 +628,7 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
 	/* Now program the hardware */
 	mutex_lock(&gpu->lock);
 	etnaviv_gpu_hw_init(gpu);
+	gpu->exec_state = -1;
 	mutex_unlock(&gpu->lock);
 
 	pm_runtime_mark_last_busy(gpu->dev);
@@ -877,6 +878,7 @@ static void recover_worker(struct work_struct *work)
 
 	etnaviv_gpu_hw_init(gpu);
 	gpu->switch_context = true;
+	gpu->exec_state = -1;
 
 	mutex_unlock(&gpu->lock);
 	pm_runtime_mark_last_busy(gpu->dev);
@@ -1475,6 +1477,7 @@ static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu)
 	etnaviv_gpu_hw_init(gpu);
 
 	gpu->switch_context = true;
+	gpu->exec_state = -1;
 
 	mutex_unlock(&gpu->lock);
 

drivers/gpu/drm/etnaviv/etnaviv_gpu.h

@@ -103,6 +103,7 @@ struct etnaviv_gpu {
 
 	/* 'ring'-buffer: */
 	struct etnaviv_cmdbuf *buffer;
+	int exec_state;
 
 	/* bus base address of memory  */
 	u32 memory_base;