Comment 4 for bug 1825222

Hello,

The following 3 configs were not enabled as they were not in 4.15 Bionic (check with git grep command):
CONFIG_PCIE_ROCKCHIP_HOST
CONFIG_PHY_ROCKCHIP_INNO_HDMI
CONFIG_ROCKCHIP_RGB

can you give this test kernel a try:
https://people.canonical.com/~phlin/kernel/lp-1825222-rockchip-arm64/

It looks OK on my side:
ubuntu@starmie-kernel:~$ grep ROCKCHIP /boot/config-4.15.0-56-generic
CONFIG_ARCH_ROCKCHIP=y
CONFIG_PCIE_ROCKCHIP=y
CONFIG_EMAC_ROCKCHIP=m
CONFIG_DWMAC_ROCKCHIP=m
CONFIG_ROCKCHIP_PHY=m
CONFIG_SPI_ROCKCHIP=m
CONFIG_PINCTRL_ROCKCHIP=y
CONFIG_ROCKCHIP_IODOMAIN=m
CONFIG_ROCKCHIP_THERMAL=m
CONFIG_VIDEO_ROCKCHIP_RGA=m
CONFIG_DRM_ROCKCHIP=m
CONFIG_ROCKCHIP_ANALOGIX_DP=y
CONFIG_ROCKCHIP_CDN_DP=y
CONFIG_ROCKCHIP_DW_HDMI=y
CONFIG_ROCKCHIP_DW_MIPI_DSI=y
CONFIG_ROCKCHIP_INNO_HDMI=y
CONFIG_ROCKCHIP_LVDS=y
CONFIG_SND_SOC_ROCKCHIP=m
CONFIG_SND_SOC_ROCKCHIP_I2S=m
CONFIG_SND_SOC_ROCKCHIP_PDM=m
CONFIG_SND_SOC_ROCKCHIP_SPDIF=m
CONFIG_SND_SOC_ROCKCHIP_MAX98090=m
CONFIG_SND_SOC_ROCKCHIP_RT5645=m
CONFIG_MMC_DW_ROCKCHIP=m
CONFIG_ROCKCHIP_TIMER=y
CONFIG_ROCKCHIP_MBOX=y
CONFIG_ROCKCHIP_IOMMU=y
CONFIG_ROCKCHIP_GRF=y
CONFIG_ROCKCHIP_PM_DOMAINS=y
CONFIG_DEVFREQ_EVENT_ROCKCHIP_DFI=m
CONFIG_ROCKCHIP_SARADC=m
CONFIG_PWM_ROCKCHIP=m
CONFIG_PHY_ROCKCHIP_DP=m
CONFIG_PHY_ROCKCHIP_EMMC=m
CONFIG_PHY_ROCKCHIP_INNO_USB2=m
CONFIG_PHY_ROCKCHIP_PCIE=m
CONFIG_PHY_ROCKCHIP_TYPEC=m
CONFIG_PHY_ROCKCHIP_USB=m
CONFIG_ROCKCHIP_EFUSE=m
CONFIG_CRYPTO_DEV_ROCKCHIP=m
ubuntu@starmie-kernel:~$ uname -a
Linux starmie-kernel 4.15.0-56-generic #62 SMP Fri Aug 2 02:59:37 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux