video: driver: add fence support

Add fence support for decoder output buffers for
the consumer to use it to improve latency.

Change-Id: I7384b4a9793248988a2d2d546a535f26636d5bb3
Signed-off-by: Maheshwar Ajja <quic_majja@quicinc.com>

driver/vidc/inc/msm_vidc_fence.h

@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef __H_MSM_VIDC_FENCE_H__
+#define __H_MSM_VIDC_FENCE_H__
+
+#include "msm_vidc_inst.h"
+#include "msm_vidc_buffer.h"
+
+int msm_vidc_fence_create(struct msm_vidc_inst *inst,
+		struct msm_vidc_buffer *buf);
+int msm_vidc_fence_signal(struct msm_vidc_inst *inst,
+		struct msm_vidc_buffer *buf);
+void msm_vidc_fence_destroy(struct msm_vidc_inst *inst,
+		struct msm_vidc_buffer *buf);
+int msm_vidc_fence_init(struct msm_vidc_inst *inst);
+void msm_vidc_fence_deinit(struct msm_vidc_inst *inst);
+
+#endif // __H_MSM_VIDC_FENCE_H__