video: driver: Take avg bitrate for clk scaling

In case of decode batch IDR frame can impact
the bitrate based clk scaling.
To tackle this use avg filled len in case
of decode batching.

Change-Id: I1b2701857118bfa1f1a4fd0c0498ee016c02e8d5
Signed-off-by: Ankush Mitra <[email protected]>

driver/vidc/src/msm_vidc_power.c

@@ -552,6 +552,7 @@ int msm_vidc_scale_power(struct msm_vidc_inst *inst, bool scale_buses)
 	struct msm_vidc_core *core;
 	struct msm_vidc_buffer *vbuf;
 	u32 data_size = 0;
+	u32 cnt = 0;
 	u32 fps;
 	u32 frame_rate, operating_rate;
 	u32 timestamp_rate = 0, input_rate = 0;
@@ -568,8 +569,22 @@ int msm_vidc_scale_power(struct msm_vidc_inst *inst, bool scale_buses)
 		inst->active = true;
 	}
 
-	list_for_each_entry(vbuf, &inst->buffers.input.list, list)
-		data_size = max(data_size, vbuf->data_size);
+	/*
+	 * consider avg. filled length in decode batching case
+	 * to avoid overvoting for the entire batch due to single
+	 * frame with huge filled length
+	 */
+	if (inst->decode_batch.enable) {
+		list_for_each_entry(vbuf, &inst->buffers.input.list, list) {
+			data_size += vbuf->data_size;
+			cnt++;
+		}
+		if (cnt)
+			data_size /= cnt;
+	} else {
+		list_for_each_entry(vbuf, &inst->buffers.input.list, list)
+			data_size = max(data_size, vbuf->data_size);
+	}
 	inst->max_input_data_size = data_size;
 
 	frame_rate = msm_vidc_get_frame_rate(inst);