diff --git a/drivers/video/rockchip/rga3/include/rga2_reg_info.h b/drivers/video/rockchip/rga3/include/rga2_reg_info.h
index 55618faeeb0d..dd9d4d7bbb94 100644
--- a/drivers/video/rockchip/rga3/include/rga2_reg_info.h
+++ b/drivers/video/rockchip/rga3/include/rga2_reg_info.h
@@ -165,8 +165,8 @@
 #define s_RGA2_OSD_CTRL0_SW_OSD_VER_MODE(x)		((x & 0x1) << 2)
 #define s_RGA2_OSD_CTRL0_SW_OSD_WIDTH_MODE(x)		((x & 0x1) << 3)
 #define s_RGA2_OSD_CTRL0_SW_OSD_BLK_NUM(x)		((x & 0x1f) << 4)
-#define s_RGA2_OSD_CTRL0_SW_OSD_FLAGS_INDEX(x)		((x & 0x3f) << 10)
-#define s_RGA2_OSD_CTRL0_SW_OSD_FIX_WIDTH(x)		((x & 0x3f) << 20)
+#define s_RGA2_OSD_CTRL0_SW_OSD_FLAGS_INDEX(x)		((x & 0x3ff) << 10)
+#define s_RGA2_OSD_CTRL0_SW_OSD_FIX_WIDTH(x)		((x & 0x3ff) << 20)
 #define s_RGA2_OSD_CTRL0_SW_OSD_2BPP_MODE(x)		((x & 0x1) << 30)
 
 /* RGA2_OSD_CTRL1 */
diff --git a/drivers/video/rockchip/rga3/rga2_reg_info.c b/drivers/video/rockchip/rga3/rga2_reg_info.c
index 89467aa929cb..361a925a6229 100644
--- a/drivers/video/rockchip/rga3/rga2_reg_info.c
+++ b/drivers/video/rockchip/rga3/rga2_reg_info.c
@@ -1450,6 +1450,9 @@ static void RGA2_set_reg_osd(u8 *base, struct rga2_req *msg)
 	/* The register is '0' as the first. */
 	block_num = msg->osd_info.mode_ctrl.block_num - 1;
 
+	if (msg->src1.format == RGA_FORMAT_RGBA_2BPP)
+		rgba2bpp_en = 1;
+
 	reg = 0;
 	reg = ((reg & (~m_RGA2_OSD_CTRL0_SW_OSD_MODE)) |
 	       (s_RGA2_OSD_CTRL0_SW_OSD_MODE(msg->osd_info.mode_ctrl.mode)));
@@ -1986,6 +1989,13 @@ static void rga_cmd_to_rga2_cmd(struct rga_scheduler_t *scheduler,
 			default:
 				break;
 			}
+
+			if (req->osd_info.enable) {
+				/* set dst(osd_block) real color mode */
+				if (req->alpha_mode_0 & (0x01 << 9))
+					req->alpha_mode_0 |= (1 << 15);
+			}
+
 			/* Real color mode */
 			if ((req_rga->alpha_rop_flag >> 9) & 1) {
 				if (req->alpha_mode_0 & (0x01 << 1))
diff --git a/drivers/video/rockchip/rga3/rga_common.c b/drivers/video/rockchip/rga3/rga_common.c
index 8c9fb0788c7d..b87c9937106b 100644
--- a/drivers/video/rockchip/rga3/rga_common.c
+++ b/drivers/video/rockchip/rga3/rga_common.c
@@ -338,6 +338,10 @@ const char *rga_get_format_name(uint32_t format)
 		return "ABGR5551";
 	case RGA_FORMAT_ABGR_4444:
 		return "ABGR4444";
+
+	case RGA_FORMAT_RGBA_2BPP:
+		return "RGBA2BPP";
+
 	default:
 		return "UNF";
 	}