Merge "msm: camera: isp: Handle out of order request" into dev/msm-4.9-camx

#include "cam_trace.h"

#include "cam_debug_util.h"

static int __cam_isp_ctx_enqueue_request_in_order(

	struct cam_context *ctx, struct cam_ctx_request *req)

{

	struct cam_ctx_request           *req_current;

	struct cam_ctx_request           *req_prev;

	struct list_head                  temp_list;

	INIT_LIST_HEAD(&temp_list);

	spin_lock_bh(&ctx->lock);

	if (list_empty(&ctx->pending_req_list)) {

		list_add_tail(&req->list, &ctx->pending_req_list);

	} else {

		list_for_each_entry_safe_reverse(

			req_current, req_prev, &ctx->pending_req_list, list) {

			if (req->request_id < req_current->request_id) {

				list_del_init(&req_current->list);

				list_add(&req_current->list, &temp_list);

				continue;

			} else if (req->request_id == req_current->request_id) {

				CAM_WARN(CAM_ISP,

					"Received duplicated request %lld",

					req->request_id);

			}

			break;

		}

		list_add_tail(&req->list, &ctx->pending_req_list);

		if (!list_empty(&temp_list)) {

			list_for_each_entry_safe(

				req_current, req_prev, &temp_list, list) {

				list_del_init(&req_current->list);

				list_add_tail(&req_current->list,

					&ctx->pending_req_list);

			}

		}

	}

	spin_unlock_bh(&ctx->lock);

	return 0;

}

static uint64_t __cam_isp_ctx_get_event_ts(uint32_t evt_id, void *evt_data)

{

	uint64_t ts = 0;

	CAM_DBG(CAM_ISP, "Packet request id 0x%llx",

		packet->header.request_id);

	spin_lock_bh(&ctx->lock);

	list_add_tail(&req->list, &ctx->pending_req_list);

	spin_unlock_bh(&ctx->lock);

	__cam_isp_ctx_enqueue_request_in_order(ctx, req);

	CAM_DBG(CAM_ISP, "Preprocessing Config %lld successful",

		req->request_id);