diff --git a/device/rockchip/ok3568c/config b/device/rockchip/ok3568c/config
index 6e088ed..4dea873 100644
--- a/device/rockchip/ok3568c/config
+++ b/device/rockchip/ok3568c/config
@@ -26,12 +26,14 @@ ROOT_FSTYPE="ext4"
 
 # platform section
 # # put it in blobs dir
-RK_DDR="rk3568_ddr_1560MHz_v1.21.bin"
+RK_DDR="rk3568_ddr_1560MHz_v1.23.bin"
 BL31="rk3568_bl31_v1.44.elf"
+UBOOT_BUILD="make KCFLAGS='-Wno-error' BL31={BL31} spl/u-boot-spl.bin u-boot.dtb u-boot.itb CROSS_COMPILE='{ARCH}-linux-gnu-'"
 MKIMAGE_CMD="tools/mkimage -n {BOOT_SOC} -T rksd -d {RK_DDR}:spl/u-boot-spl.bin idbloader.img"
-UBOOT_BUILD="make BL31={BL31} spl/u-boot-spl.bin u-boot.dtb u-boot.itb CROSS_COMPILE='{ARCH}-linux-gnu-'"
-# make BL31=rk3568_bl31_v1.44.elf spl/u-boot-spl.bin u-boot.dtb u-boot.itb CROSS_COMPILE="aarch64-linux-gnu-"
+# url to download rockchip bootloader blobs
+BLOBS_URL="https://github.com/rockchip-linux/rkbin/raw/refs/heads/master/bin/rk35/"
 
+# make BL31=rk3568_bl31_v1.44.elf spl/u-boot-spl.bin u-boot.dtb u-boot.itb CROSS_COMPILE="aarch64-linux-gnu-"
 # dd if=idbloader.img of=/dev/loop1 seek=64 conv=notrunc status=none
 # dd if=u-boot.itb of=/dev/loop1 seek=16384 conv=notrunc status=none
 # mkimage -A arm64 -O linux -T ramdisk -C gzip -n uInitrd -d /boot/initramfs-6.1.75.img /boot/uInitrd
diff --git a/utils/common.py b/utils/common.py
index a3734f2..e91eed1 100644
--- a/utils/common.py
+++ b/utils/common.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 import os
 import subprocess
+from urllib.request import urlretrieve
 
 def load_config(config_path):
     config = {}
@@ -18,3 +19,16 @@ def clone_repo(repo_url, branch, dest_dir, name):
     else:
         os.makedirs(dest_dir, exist_ok=True)
         subprocess.run(["git", "clone", "--depth", "1", repo_url, "-b", branch, dest_dir], check=True)
+
+
+def download_blob(blob_url, destination):
+    """Download a file from the given URL and save it to the destination."""
+    try:
+        print(f"Downloading {blob_url} to {destination}...")
+        os.makedirs(os.path.dirname(destination), exist_ok=True)
+        urlretrieve(blob_url, destination)
+        print(f"Downloaded: {destination}")
+        return True
+    except Exception as e:
+        print(f"Warning: Unable to download {blob_url}. {e}")
+        return False
diff --git a/utils/uboot.py b/utils/uboot.py
index 353d5a2..da6e3fa 100644
--- a/utils/uboot.py
+++ b/utils/uboot.py
@@ -5,9 +5,9 @@ import os
 import sys
 import subprocess
 from utils.common import clone_repo
+from utils.common import download_blob
 from utils.patch import apply_uboot_patches
 
-
 def build_uboot(TMP_DIR, BASE_DIR, config, vendor, device):
     if "UBOOT" not in config or "UBOOT_VERSION" not in config:
         print("U-Boot configuration not found. Skipping U-Boot build.")
@@ -18,28 +18,53 @@ def build_uboot(TMP_DIR, BASE_DIR, config, vendor, device):
     uboot_config = config.get("UBOOT_CONFIG")
     uboot_build_cmd = config.get("UBOOT_BUILD")
     mkimage_cmd = config.get("MKIMAGE_CMD")
+    blobs_url = config.get("BLOBS_URL", "")
 
-    blobs_dir = os.path.join(BASE_DIR, "device", vendor, device, "blobs")
-    rk_ddr = os.path.join(blobs_dir, config.get("RK_DDR", ""))
-    bl31 = os.path.join(blobs_dir, config.get("BL31", ""))
-
-    if not os.path.isfile(rk_ddr) or not os.path.isfile(bl31):
-        print(f"Missing required files in blobs directory: {rk_ddr}, {bl31}")
-        return
-
+    # Clone U-Boot repository
     uboot_dir = os.path.join(TMP_DIR, vendor, device, "u-boot")
     clone_repo(uboot_git, uboot_branch, uboot_dir, "u-boot")
     apply_uboot_patches(BASE_DIR, vendor, device, uboot_dir)
 
+    # Download RK_DDR blob to uboot_dir
+    rk_ddr = None
+    if "RK_DDR" in config:
+        rk_ddr = os.path.join(uboot_dir, os.path.basename(config.get("RK_DDR")))
+        rk_ddr_url = os.path.join(blobs_url, os.path.basename(rk_ddr))
+        if not os.path.isfile(rk_ddr):
+            if not download_blob(rk_ddr_url, rk_ddr):
+                print(f"Warning: RK_DDR blob {rk_ddr_url} could not be downloaded.")
+
+    # Download BL31 blob to uboot_dir
+    bl31 = None
+    if "BL31" in config:
+        bl31 = os.path.join(uboot_dir, os.path.basename(config.get("BL31")))
+        bl31_url = os.path.join(blobs_url, os.path.basename(bl31))
+        if not os.path.isfile(bl31):
+            if not download_blob(bl31_url, bl31):
+                print(f"Warning: BL31 blob {bl31_url} could not be downloaded.")
+
+    # Build U-Boot
     os.chdir(uboot_dir)
     try:
         print(f"Building U-Boot for {vendor}/{device} {uboot_config}...")
         subprocess.run(["make", uboot_config], check=True)
-        build_command = uboot_build_cmd.format(BL31=bl31, ARCH=config.get("ARCH", "aarch64"))
+
+        # Format U-Boot build command
+        build_command = uboot_build_cmd.format(
+            BL31=bl31 or "",
+            ARCH=config.get("ARCH", "aarch64")
+        )
         subprocess.run(build_command, shell=True, check=True)
-        mkimage_command = mkimage_cmd.format(BOOT_SOC=config.get("BOOT_SOC", ""), RK_DDR=rk_ddr)
+
+        # Format mkimage command
+        mkimage_command = mkimage_cmd.format(
+            BOOT_SOC=config.get("BOOT_SOC", ""),
+            RK_DDR=rk_ddr or ""
+        )
+        print(mkimage_command)
         subprocess.run(mkimage_command, shell=True, check=True)
+
         print("U-Boot build completed successfully.")
     except subprocess.CalledProcessError as e:
         print(f"Error during U-Boot build: {e}")
-
+    os.chdir(BASE_DIR)