diff --git a/drivers/media/platform/rockchip/isp/isp_stats_v3x.c b/drivers/media/platform/rockchip/isp/isp_stats_v3x.c
index c7faaade192a..0f71ec029e26 100644
--- a/drivers/media/platform/rockchip/isp/isp_stats_v3x.c
+++ b/drivers/media/platform/rockchip/isp/isp_stats_v3x.c
@@ -956,6 +956,76 @@ static struct rkisp_stats_ops_v3x __maybe_unused stats_ddr_ops_v3x = {
 	.get_dhaz_stats = rkisp_stats_get_dhaz_stats,
 };
 
+static void
+rkisp_merge_dual_dhaz_params(struct rkisp_isp_stats_vdev *stats_vdev,
+			     struct rkisp3x_isp_stat_buffer *left_stat,
+			     struct rkisp3x_isp_stat_buffer *right_stat)
+{
+	struct rkisp_device *dev = stats_vdev->dev;
+	struct isp3x_dhaz_cfg *dhaz_cfg;
+	struct isp3x_dhaz_stat *l_dhaz;
+	struct isp3x_dhaz_stat *r_dhaz;
+	u32 i, val, hist_out0, hist_out1, hist_out2, pic_sumh;
+	u32 num = isp3_stats_read(stats_vdev, ISP3X_DHAZ_IIR0, 0) & 0x1f;
+
+	if (!left_stat || !right_stat ||
+	    !(left_stat->meas_type & ISP3X_STAT_DHAZ) ||
+	    !(right_stat->meas_type & ISP3X_STAT_DHAZ) ||
+	    !(isp3_stats_read(stats_vdev, ISP3X_DHAZ_CTRL, 0) & BIT(25)) ||
+	    !(isp3_stats_read(stats_vdev, ISP3X_DHAZ_CTRL, 0) & BIT(4)))
+		return;
+
+	dhaz_cfg = &dev->params_vdev.isp3x_params->others.dhaz_cfg;
+	l_dhaz = &left_stat->params.dhaz;
+	r_dhaz = &right_stat->params.dhaz;
+
+	if (!num || (!l_dhaz->dhaz_pic_sumh && !r_dhaz->dhaz_pic_sumh)) {
+		v4l2_err(stats_vdev->vnode.vdev.v4l2_dev,
+			 "%s 0 params, num:%d sumh:%d %d\n", __func__,
+			 num, l_dhaz->dhaz_pic_sumh, r_dhaz->dhaz_pic_sumh);
+		return;
+	}
+
+	val = ISP_PACK_2SHORT((l_dhaz->dhaz_adp_wt + r_dhaz->dhaz_adp_wt) / 2,
+			      (l_dhaz->dhaz_adp_air_base + r_dhaz->dhaz_adp_air_base) / 2);
+	isp3_stats_write(stats_vdev, ISP3X_DHAZ_ADT_WR0, val, 0);
+	isp3_stats_write(stats_vdev, ISP3X_DHAZ_ADT_WR0, val, 1);
+
+	val = ISP_PACK_2SHORT((l_dhaz->dhaz_adp_tmax + r_dhaz->dhaz_adp_tmax) / 2,
+			      (l_dhaz->dhaz_adp_gratio + r_dhaz->dhaz_adp_gratio) / 2);
+	isp3_stats_write(stats_vdev, ISP3X_DHAZ_ADT_WR1, val, 0);
+	isp3_stats_write(stats_vdev, ISP3X_DHAZ_ADT_WR1, val, 1);
+
+	num =  min_t(u32, num, left_stat->frame_id + 1);
+	pic_sumh = l_dhaz->dhaz_pic_sumh + r_dhaz->dhaz_pic_sumh;
+	for (i = 0; i < ISP3X_DHAZ_HIST_WR_NUM / 3; i++) {
+		hist_out0 = (l_dhaz->h_rgb_iir[i * 3] * l_dhaz->dhaz_pic_sumh +
+			     r_dhaz->h_rgb_iir[i * 3] * r_dhaz->dhaz_pic_sumh) / pic_sumh;
+		hist_out0 = (dhaz_cfg->hist_wr[i * 3] * (num - 1) + hist_out0) / num;
+		dhaz_cfg->hist_wr[i * 3] = hist_out0;
+
+		hist_out1 = (l_dhaz->h_rgb_iir[i * 3 + 1] * l_dhaz->dhaz_pic_sumh +
+			     r_dhaz->h_rgb_iir[i * 3 + 1] * r_dhaz->dhaz_pic_sumh) / pic_sumh;
+		hist_out1 = (dhaz_cfg->hist_wr[i * 3 + 1] * (num - 1) + hist_out1) / num;
+		dhaz_cfg->hist_wr[i * 3 + 1] = hist_out1;
+
+		hist_out2 = (l_dhaz->h_rgb_iir[i * 3 + 2] * l_dhaz->dhaz_pic_sumh +
+			     r_dhaz->h_rgb_iir[i * 3 + 2] * r_dhaz->dhaz_pic_sumh) / pic_sumh;
+		hist_out2 = (dhaz_cfg->hist_wr[i * 3 + 2] * (num - 1) + hist_out2) / num;
+		dhaz_cfg->hist_wr[i * 3 + 2] = hist_out2;
+
+		val = hist_out0 | hist_out1 << 10 | hist_out2 << 20;
+		isp3_stats_write(stats_vdev, ISP3X_DHAZ_HIST_WR0 + i * 4, val, 0);
+		isp3_stats_write(stats_vdev, ISP3X_DHAZ_HIST_WR0 + i * 4, val, 1);
+	}
+	val = (l_dhaz->h_rgb_iir[i * 3] * l_dhaz->dhaz_pic_sumh +
+	       r_dhaz->h_rgb_iir[i * 3] * r_dhaz->dhaz_pic_sumh) / pic_sumh;
+	val = (dhaz_cfg->hist_wr[i * 3] * (num - 1) + val) / num;
+	dhaz_cfg->hist_wr[i * 3] = val;
+	isp3_stats_write(stats_vdev, ISP3X_DHAZ_HIST_WR0 + i * 4, val, 0);
+	isp3_stats_write(stats_vdev, ISP3X_DHAZ_HIST_WR0 + i * 4, val, 1);
+}
+
 static void
 rkisp_stats_send_meas_v3x(struct rkisp_isp_stats_vdev *stats_vdev,
 			  struct rkisp_isp_readout_work *meas_work)
@@ -1034,6 +1104,8 @@ rkisp_stats_send_meas_v3x(struct rkisp_isp_stats_vdev *stats_vdev,
 	}
 
 	if (stats_vdev->dev->hw_dev->is_unite) {
+		struct rkisp3x_isp_stat_buffer *left_stat = cur_stat_buf;
+
 		size *= 2;
 		if (cur_buf) {
 			cur_stat_buf++;
@@ -1063,6 +1135,7 @@ rkisp_stats_send_meas_v3x(struct rkisp_isp_stats_vdev *stats_vdev,
 			ret |= ops->get_bls_stats(stats_vdev, cur_stat_buf, 1);
 			ret |= ops->get_dhaz_stats(stats_vdev, cur_stat_buf, 1);
 		}
+		rkisp_merge_dual_dhaz_params(stats_vdev, left_stat, cur_stat_buf);
 	}
 
 	if (cur_buf && !ret) {