diff --git a/drivers/amlogic/media/vin/tvin/tvafe/tvafe.c b/drivers/amlogic/media/vin/tvin/tvafe/tvafe.c
index d6838682d661..c89992fd8018 100644
--- a/drivers/amlogic/media/vin/tvin/tvafe/tvafe.c
+++ b/drivers/amlogic/media/vin/tvin/tvafe/tvafe.c
@@ -323,6 +323,7 @@ void tvafe_dec_start(struct tvin_frontend_s *fe, enum tvin_sig_fmt_e fmt)
 	enum tvin_port_e port = devp->tvafe.parm.port;
 
 	mutex_lock(&devp->afe_mutex);
+	manual_flag = 0;
 	if (!(devp->flags & TVAFE_FLAG_DEV_OPENED)) {
 
 		tvafe_pr_err("tvafe_dec_start(%d) decode havn't opened\n",
@@ -976,6 +977,8 @@ static long tvafe_ioctl(struct file *file,
 			tvafe->cvd2.manual_fmt = fmt;
 			tvafe_pr_info("%s: ioctl set cvd2 manual fmt:%s.\n",
 				__func__, tvin_sig_fmt_str(fmt));
+			if (fmt != TVIN_SIG_FMT_NULL)
+				manual_flag = 1;
 			break;
 		}
 	case TVIN_IOC_G_AFE_CVBS_STD:
diff --git a/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.c b/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.c
index 4e5a98c39513..1ac4fbe53744 100644
--- a/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.c
+++ b/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.c
@@ -92,9 +92,11 @@ static int atv_stable_fmt_check_enable;
 static int atv_prestable_out_cnt = 100;
 static int other_stable_out_cnt = EXIT_STABLE_MAX_CNT;
 static int other_unstable_out_cnt = BACK_STABLE_MAX_CNT;
+static int manual_unstable_out_cnt = 30;
 static int other_unstable_in_cnt = UNSTABLE_MAX_CNT;
 static int nosig_in_cnt = NOSIG_MAX_CNT;
 static int nosig2_unstable_cnt = EXIT_NOSIG_MAX_CNT;
+bool manual_flag;
 
 #ifdef DEBUG_SUPPORT
 module_param(back_nosig_max_cnt, int, 0664);
@@ -408,6 +410,9 @@ void tvin_smr(struct vdin_dev_s *devp)
 					(port == TVIN_PORT_CVBS0)) &&
 					(devp->flags & VDIN_FLAG_SNOW_FLAG))
 					unstb_in = sm_p->atv_unstable_out_cnt;
+				else if ((port == TVIN_PORT_CVBS3) &&
+					manual_flag)
+					unstb_in = manual_unstable_out_cnt;
 				else if ((port >= TVIN_PORT_HDMI0) &&
 						 (port <= TVIN_PORT_HDMI7))
 					unstb_in = sm_p->hdmi_unstable_out_cnt;
diff --git a/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.h b/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.h
index b3009111cc5b..92fdd32d3013 100644
--- a/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.h
+++ b/drivers/amlogic/media/vin/tvin/vdin/vdin_sm.h
@@ -49,6 +49,9 @@ struct tvin_sm_s {
 	int atv_stable_out_cnt;
 	int hdmi_unstable_out_cnt;
 };
+
+extern bool manual_flag;
+
 void tvin_smr(struct vdin_dev_s *pdev);
 void tvin_smr_init(int index);
 void reset_tvin_smr(unsigned int index);