tizenketto Posted February 21, 2021 Share Posted February 21, 2021 I have a Measy (R-BOX) U4C rk3188. Before I recycled it I thought I would try to get a linux kernel running on it and found this these posts. I experimented with Armbian_21.02.0-trunk_Rk3188_focal_current_5.10.6_xfce_desktop.img from 13JAN. (Thanks Balbes!) It boots with rk3188-rbox-cs968.dtb and most everything works but the video ouput is color shifted. So HDMI video output is fine but the colors wrong and HDMI audio is not working. I took apart the Android firmware that was on the thing but with a V3 kernel without uboot it is kind of difficult to see into the kernel. I assume the device tree is somehow off for this system or, more likely the uInitrd is loading an incorrect fb module. Console: switching to colour frame buffer device 240x67 rockchip-drm display-subsystem: [drm] fb0: rockchipdrmfb frame buffer device Other errors are: Broadcom brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43362-sdio.rockchip,rk3188.txt failed with error -2 brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43362-sdio for chip BCM43362/1 brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43362/1 wl0: Apr 22 2013 14:50:00 version 5.90.195.89.6 FWID 01-b30a427d Bluetooth: hci0: command 0x0c03 tx timeout Bluetooth: hci0: BCM: Reset failed (-110) ieee80211 phy0: brcmf_cfg80211_add_iface: add iface p2p-dev-wlan0 type 10 failed: err=-5 brcmfmac: brcmf_sdio_dpc: failed backplane access over SDIO, halting operation brcmfmac: brcmf_sdio_bus_rxctl: resumed on timeout ieee80211 phy0: brcmf_run_escan: error (-110) HDMI audio hdmi-audio-codec hdmi-audio-codec.0.auto: ASoC: error at snd_soc_dai_hw_params on i2s-hifi: -22 it66121 2-004c: it66121_audio_hw_params: sink has no audio However the Broadcom WIFI is working and Bluetooth appears to be working as well although I did not try to pair any device. I have a tarball of all the logs if that would help but since there is no error other than a beautiful green/cyan. I don't know how to proceed to compile a new kernel/modules for this. Any direction getting the correct device tree/kernel/modules built for this? Link to comment Share on other sites More sharing options...
SteeMan Posted February 25, 2021 Share Posted February 25, 2021 Moved your post to the Rockchip CPU Box forum. I do not work with rockchip based boxes myself, but there are a few people who do in this forum that may be able to provide you some guidance. The RK3188 is an older 32bit cpu. A lot of the effort recently around here is support for more recent 64 bit based cpus. This post was originally posted to the mega thread: https://forum.armbian.com/topic/14232-single-armbian-image-for-rk-aml-aw-armhf-armv7 Link to comment Share on other sites More sharing options...
tizenketto Posted February 25, 2021 Author Share Posted February 25, 2021 Well I am getting closer. I just need to make the dts bind vop correctly or recompile the fb.ko when I figure it out. There doesnt seem to be a way to pass parameters at boot. I have decompiled an android zImage so I will spend some time with that... Link to comment Share on other sites More sharing options...
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