Add build stage for Rock PI 4

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>

.gitlab-ci-custom.yml

@@ -35,3 +35,23 @@ imx8mq-evk:
     paths:
       - $CI_PROJECT_DIR/flash.bin
       - $CI_PROJECT_DIR/flash.bin.hash
+
+rock-pi-4:
+  stage: build
+  image: debian:testing
+  before_script:
+    - echo "deb  http://deb.debian.org/debian testing main contrib non-free" > /etc/apt/sources.list
+    - echo "deb-src http://deb.debian.org/debian testing main contrib non-free" >> /etc/apt/sources.list
+    - apt-get update && apt-get $APT_OPTIONS build-dep u-boot && apt-get $APT_OPTIONS install git u-boot-tools python-pyelftools gcc-aarch64-linux-gnu g++-aarch64-linux-gnu wget
+  script:
+    - echo "CONFIG_NET_RANDOM_ETHADDR=y" >> configs/rock-pi-4-rk3399_defconfig
+    - make rock-pi-4-rk3399_defconfig
+    - make -j$(nproc)
+    - git clone --depth 1 https://github.com/rockchip-linux/rkbin.git
+    - (cd rkbin && mkimage -n rk3399 -T rksd -d bin/rk33/rk3399_ddr_800MHz_*.bin idbloader.img && cat bin/rk33/rk3399_miniloader_v*.bin >> idbloader.img
+    - (cd rkbin && ./tools/loaderimage --pack --uboot ../u-boot-dtb.bin uboot.img 0x200000 --size 1024 1)
+    - (cd rkbin && ./tools/trust_merger --size 1024 1 RKTRUST/RK3399TRUST.ini)
+  artifacts:
+    name: bootloader
+    paths:
+      - $CI_PROJECT_DIR/rkbin/*.img