msm: camera: isp: Remove bubble re-apply recovery mechanism

If a request has been applied the buffer addresses have been
configured, and if a frame bubbles buf done is expected on
the same frame or in the worse case on the next frame.
SW should not try adding a bubbled request back to pending
list without a buf done for that request.

CRs-Fixed: 2729789
Change-Id: I9a2f45c58d39b659cd7a12747dc738c43cf5e0ad
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>

drivers/cam_isp/cam_isp_context.c

@@ -987,7 +987,6 @@ static int __cam_isp_ctx_handle_buf_done_for_request(
 				ctx->ctx_id);
 		} else {
 			list_add(&req->list, &ctx->pending_req_list);
-			ctx_isp->bubble_frame_cnt = 0;
 			CAM_DBG(CAM_REQ,
 				"Move active request %lld to pending list(cnt = %d) [bubble recovery], ctx %u",
 				req->request_id, ctx_isp->active_req_cnt,
@@ -1311,44 +1310,6 @@ static int __cam_isp_ctx_notify_sof_in_activated_state(
 	 * In this case, we need to skip the current notification. This
 	 * helps the state machine to catch up the delay.
 	 */
-
-	if (atomic_read(&ctx_isp->process_bubble)) {
-
-		if (list_empty(&ctx->active_req_list)) {
-			CAM_ERR(CAM_ISP,
-				"No available active req in bubble");
-			atomic_set(&ctx_isp->process_bubble, 0);
-			rc = -EINVAL;
-			return rc;
-		}
-
-		req = list_first_entry(&ctx->active_req_list,
-			struct cam_ctx_request, list);
-		req_isp = (struct cam_isp_ctx_req *) req->req_priv;
-
-		if (ctx_isp->bubble_frame_cnt >= 1 &&
-			req_isp->bubble_detected) {
-			req_isp->num_acked = 0;
-			ctx_isp->bubble_frame_cnt = 0;
-			req_isp->bubble_detected = false;
-			list_del_init(&req->list);
-			list_add(&req->list, &ctx->pending_req_list);
-			atomic_set(&ctx_isp->process_bubble, 0);
-			ctx_isp->active_req_cnt--;
-			CAM_DBG(CAM_REQ,
-				"Move active req: %lld to pending list(cnt = %d) [bubble re-apply], ctx %u",
-				req->request_id,
-				ctx_isp->active_req_cnt, ctx->ctx_id);
-		} else if (req_isp->bubble_detected) {
-			ctx_isp->bubble_frame_cnt++;
-			CAM_DBG(CAM_ISP,
-				"Waiting on bufdone for bubble req: %lld, since frame_cnt = %lld",
-				req->request_id, ctx_isp->bubble_frame_cnt);
-		} else
-			CAM_DBG(CAM_ISP, "Delayed bufdone for req: %lld",
-				req->request_id);
-	}
-
 	if (ctx->ctx_crm_intf && ctx->ctx_crm_intf->notify_trigger &&
 		ctx_isp->active_req_cnt <= 2) {
 		if (ctx_isp->subscribe_event & CAM_TRIGGER_POINT_SOF) {
@@ -3072,7 +3033,6 @@ static int __cam_isp_ctx_flush_req_in_top_state(
 	}
 
 end:
-	ctx_isp->bubble_frame_cnt = 0;
 	atomic_set(&ctx_isp->process_bubble, 0);
 	atomic_set(&ctx_isp->rxd_epoch, 0);
 	return rc;
@@ -4728,7 +4688,6 @@ static int __cam_isp_ctx_start_dev_in_ready(struct cam_context *ctx,
 	ctx_isp->frame_id = 0;
 	ctx_isp->active_req_cnt = 0;
 	ctx_isp->reported_req_id = 0;
-	ctx_isp->bubble_frame_cnt = 0;
 	ctx_isp->substate_activated = ctx_isp->rdi_only_context ?
 		CAM_ISP_CTX_ACTIVATED_APPLIED :
 		(req_isp->num_fence_map_out) ? CAM_ISP_CTX_ACTIVATED_EPOCH :
@@ -4905,7 +4864,6 @@ static int __cam_isp_ctx_stop_dev_in_activated_unlock(
 	ctx_isp->frame_id = 0;
 	ctx_isp->active_req_cnt = 0;
 	ctx_isp->reported_req_id = 0;
-	ctx_isp->bubble_frame_cnt = 0;
 	ctx_isp->last_applied_req_id = 0;
 	ctx_isp->req_info.last_bufdone_req_id = 0;
 	atomic_set(&ctx_isp->process_bubble, 0);
@@ -5380,7 +5338,7 @@ int cam_isp_context_init(struct cam_isp_context *ctx,
 	ctx->active_req_cnt = 0;
 	ctx->reported_req_id = 0;
 	ctx->req_info.last_bufdone_req_id = 0;
-	ctx->bubble_frame_cnt = 0;
+
 	ctx->hw_ctx = NULL;
 	ctx->substate_activated = CAM_ISP_CTX_ACTIVATED_SOF;
 	ctx->substate_machine = cam_isp_ctx_activated_state_machine;

drivers/cam_isp/cam_isp_context.h

@@ -226,7 +226,6 @@ struct cam_isp_context_event_record {
  * @substate_actiavted:        Current substate for the activated state.
  * @process_bubble:            Atomic variable to check if ctx is still
  *                             processing bubble.
- * @bubble_frame_cnt:          Count number of frames since the req is in bubble
  * @substate_machine:          ISP substate machine for external interface
  * @substate_machine_irq:      ISP substate machine for irq handling
  * @req_base:                  Common request object storage
@@ -267,7 +266,6 @@ struct cam_isp_context {
 	uint32_t                         frame_id_meta;
 	uint32_t                         substate_activated;
 	atomic_t                         process_bubble;
-	uint32_t                         bubble_frame_cnt;
 	struct cam_ctx_ops              *substate_machine;
 	struct cam_isp_ctx_irq_ops      *substate_machine_irq;