December 3, 2025Dec 3 The HDMI0(Port next to Headphone Jack) is driven by DP1 on rk3588 via RA620(a dp2hdmi converter). https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/arm64/boot/dts/rockchip?h=v6.18&id=07c53a9e970712b1a479dd0ec4adfe184482c22f ROCKCHIP_DW_DP is needed in order to have working 2nd HDMI port. In menuconfig : Device Drivers ---> Direct Rendering Manager (XFree86 4.Graphics support ---> 1.0 and higher DRI support) ---> Rockchip specific extensions for Synopsys DW DP <pre> │ CONFIG_ROCKCHIP_DW_DP: │ │ │ │ This selects support for Rockchip SoC specific extensions │ │ to enable Synopsys DesignWare Cores based DisplayPort transmit │ │ controller support on Rockchip SoC, If you want to enable DP on │ │ rk3588 based SoC, you should select this option. │ │ │ │ Symbol: ROCKCHIP_DW_DP [=n] │ </pre> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/arm64/boot/dts/rockchip/rk3588-extra.dtsi?h=v6.18&id=64566e35757faded57a65d65e84b5ca95974ee19
December 13, 2025Dec 13 Author Solution Works just fine on last version. Thanks a lot !!! <pre> $ zcat /proc/config.gz | grep DP| grep ROCK CONFIG_ROCKCHIP_ANALOGIX_DP=y CONFIG_ROCKCHIP_CDN_DP=y CONFIG_ROCKCHIP_DW_DP=y CONFIG_PHY_ROCKCHIP_DP=y CONFIG_PHY_ROCKCHIP_DPHY_RX0=m CONFIG_PHY_ROCKCHIP_INNO_CSIDPHY=m CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY=m CONFIG_PHY_ROCKCHIP_SAMSUNG_HDPTX=m CONFIG_PHY_ROCKCHIP_USBDP=m CONFIG_PHY_ROCKCHIP_DP=y </pre> Edited December 13, 2025Dec 13 by Popolon
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