diff --git a/drivers/video/rockchip/rga3/rga2_reg_info.c b/drivers/video/rockchip/rga3/rga2_reg_info.c
index aa3ff9e44037..584b7ab5bba4 100644
--- a/drivers/video/rockchip/rga3/rga2_reg_info.c
+++ b/drivers/video/rockchip/rga3/rga2_reg_info.c
@@ -2103,50 +2103,7 @@ static void rga_cmd_to_rga2_cmd(struct rga_scheduler_t *scheduler,
 				req->alpha_config.bg_global_alpha_value = 0xff;
 			}
 
-			/* porter duff alpha enable */
-			switch (req_rga->PD_mode) {
-			/* dst = 0 */
-			case 0:
-				break;
-			case 1:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC;
-				break;
-			case 2:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST;
-				break;
-			case 3:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_OVER;
-				break;
-			case 4:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_OVER;
-				break;
-			case 5:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_IN;
-				break;
-			case 6:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_IN;
-				break;
-			case 7:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_OUT;
-				break;
-			case 8:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_OUT;
-				break;
-			case 9:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_ATOP;
-				break;
-			case 10:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_ATOP;
-				break;
-			case 11:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_XOR;
-				break;
-			case 12:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_CLEAR;
-				break;
-			default:
-				break;
-			}
+			req->alpha_config.mode = req_rga->PD_mode;
 		}
 	}
 
diff --git a/drivers/video/rockchip/rga3/rga3_reg_info.c b/drivers/video/rockchip/rga3/rga3_reg_info.c
index 69eab8b6606c..96055052cdfd 100644
--- a/drivers/video/rockchip/rga3/rga3_reg_info.c
+++ b/drivers/video/rockchip/rga3/rga3_reg_info.c
@@ -1659,50 +1659,7 @@ static void rga_cmd_to_rga3_cmd(struct rga_req *req_rga, struct rga3_req *req)
 				req->alpha_config.bg_global_alpha_value = 0xff;
 			}
 
-			/* porter duff alpha enable */
-			switch (req_rga->PD_mode) {
-			/* dst = 0 */
-			case 0:
-				break;
-			case 1:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC;
-				break;
-			case 2:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST;
-				break;
-			case 3:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_OVER;
-				break;
-			case 4:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_OVER;
-				break;
-			case 5:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_IN;
-				break;
-			case 6:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_IN;
-				break;
-			case 7:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_OUT;
-				break;
-			case 8:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_OUT;
-				break;
-			case 9:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_SRC_ATOP;
-				break;
-			case 10:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_DST_ATOP;
-				break;
-			case 11:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_XOR;
-				break;
-			case 12:
-				req->alpha_config.mode = RGA_ALPHA_BLEND_CLEAR;
-				break;
-			default:
-				break;
-			}
+			req->alpha_config.mode = req_rga->PD_mode;
 		}
 	}