Here is the log of the old Radxa kernel, please note that the last switch to 5120x2160p60 is the one I did manually in desktop after system has booted:
rock@rock-5b:~$ uname -a
Linux rock-5b 6.1.43-15-rk2312 #3176a44da SMP Wed Jul 31 04:27:40 UTC 2024 aarch64 GNU/Linux
rock@rock-5b:~$ sudo dmesg | grep -i -e hdmi -e "Update mode to"
[ 4.293714] platform fdd90000.vop: Fixed dependency cycle(s) with /hdmi@fde80000
[ 4.308586] platform fdd90000.vop: Fixed dependency cycle(s) with /hdmi@fdea0000
[ 5.598812] phy phy-fed60000.hdmiphy.9: Looking up phy-supply from device tree
[ 5.598817] phy phy-fed60000.hdmiphy.9: Looking up phy-supply property in node /hdmiphy@fed60000 failed
[ 5.599476] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy init success
[ 5.599665] phy phy-fed70000.hdmiphy.10: Looking up phy-supply from device tree
[ 5.599671] phy phy-fed70000.hdmiphy.10: Looking up phy-supply property in node /hdmiphy@fed70000 failed
[ 5.600288] rockchip-hdptx-phy-hdmi fed70000.hdmiphy: hdptx phy init success
[ 5.603176] mpp_service mpp-srv: 3176a44da author: Ken Wang 2024-07-29 drm: bridge: synopsys: set hdmi->last
_connector_result in dw_hdmi_connector_detect()
[ 5.651785] dwhdmi-rockchip fde80000.hdmi: Looking up avdd-0v9-supply from device tree
[ 5.651794] dwhdmi-rockchip fde80000.hdmi: Looking up avdd-0v9-supply property in node /hdmi@fde80000 failed
[ 5.651804] dwhdmi-rockchip fde80000.hdmi: Looking up avdd-1v8-supply from device tree
[ 5.651811] dwhdmi-rockchip fde80000.hdmi: Looking up avdd-1v8-supply property in node /hdmi@fde80000 failed
[ 5.652245] dwhdmi-rockchip fde80000.hdmi: registered ddc I2C bus driver
[ 5.652847] rockchip-drm display-subsystem: bound fde80000.hdmi (ops 0xffff8000091496d0)
[ 5.652945] dwhdmi-rockchip fdea0000.hdmi: Looking up avdd-0v9-supply from device tree
[ 5.652954] dwhdmi-rockchip fdea0000.hdmi: Looking up avdd-0v9-supply property in node /hdmi@fdea0000 failed
[ 5.652965] dwhdmi-rockchip fdea0000.hdmi: Looking up avdd-1v8-supply from device tree
[ 5.652972] dwhdmi-rockchip fdea0000.hdmi: Looking up avdd-1v8-supply property in node /hdmi@fdea0000 failed
[ 5.653357] dwhdmi-rockchip fdea0000.hdmi: registered ddc I2C bus driver
[ 5.653921] rockchip-drm display-subsystem: bound fdea0000.hdmi (ops 0xffff8000091496d0)
[ 5.850665] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 5.850698] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_enable] Update mode to 2560x1080p60, type: 11(
if:800, flag:0x0) for vp0 dclk: 181320000
[ 5.850882] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx_ropll_cmn_config bus_width:1baad0 rate:1813200
[ 5.851157] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy pll locked!
[ 5.851199] dwhdmi-rockchip fde80000.hdmi: final tmdsclk = 181320000
[ 5.854710] dwhdmi-rockchip fde80000.hdmi: don't use dsc mode
[ 5.854714] dwhdmi-rockchip fde80000.hdmi: dw hdmi qp use tmds mode
[ 5.854720] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: bus_width:0x1baad0,bit_rate:1813200
[ 5.854914] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy lane locked!
[ 5.854939] dwhdmi-rockchip fde80000.hdmi: Rate 181320000 missing; compute N dynamically
[ 5.867943] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 5.894369] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 5.894541] dw-hdmi-qp-hdcp dw-hdmi-qp-hdcp.3.auto: dw_hdcp_qp_hdcp_probe success
[ 5.894657] dw-hdmi-qp-hdcp dw-hdmi-qp-hdcp.6.auto: dw_hdcp_qp_hdcp_probe success
[ 5.902857] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 5.994743] rk_hdmirx fdee0000.hdmirx-controller: No reserved memory for HDMIRX, use default CMA
[ 5.994765] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_probe: cpu_aff:0x500, Bound_cpu:5, wdt_cfg_bound_cp
u:6, phy_cpuid:5
[ 5.995254] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_audio_interrupts_setup: 0
[ 5.996413] rk_hdmirx fdee0000.hdmirx-controller: rk_hdmirx_hdcp_register success
[ 5.996459] rk_hdmirx fdee0000.hdmirx-controller: fdee0000.hdmirx-controller driver probe ok!
[ 6.029186] input: rockchip-hdmi0 rockchip-hdmi0 as /devices/platform/hdmi0-sound/sound/card0/input1
[ 6.030570] input: rockchip-hdmi1 rockchip-hdmi1 as /devices/platform/hdmi1-sound/sound/card1/input2
[ 6.031487] input: rockchip-hdmi2 rockchip-hdmi2 as /devices/platform/dp0-sound/sound/card2/input3
[ 6.043671] input: rockchip,hdmiin rockchip,hdmiin as /devices/platform/hdmiin-sound/sound/card3/input4
[ 6.096220] rockchip-dmc dmc: hdmirx_rate = 2112000000
[ 6.165742] #0: rockchip-hdmi0
[ 6.165746] #1: rockchip-hdmi1
[ 6.165750] #2: rockchip-hdmi2
[ 6.165754] #3: rockchip,hdmiin
[ 6.642810] rc rc0: dw_hdmi_qp as /devices/platform/fde80000.hdmi/rc/rc0
[ 6.642919] input: dw_hdmi_qp as /devices/platform/fde80000.hdmi/rc/rc0/input5
[ 6.643762] rc rc1: dw_hdmi_qp as /devices/platform/fdea0000.hdmi/rc/rc1
[ 6.643995] input: dw_hdmi_qp as /devices/platform/fdea0000.hdmi/rc/rc1/input6
[ 7.187007] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 8.123479] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 9.959423] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.296776] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 10.320104] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 10.336798] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 10.389304] dwhdmi-rockchip fde80000.hdmi: Rate 181320000 missing; compute N dynamically
[ 10.392631] dwhdmi-rockchip fde80000.hdmi: Rate 181320000 missing; compute N dynamically
[ 10.427347] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_audio_startup: device is no connected or audio is o
ff
[ 10.427405] hdmi-audio-codec hdmi-audio-codec.15.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -19
[ 10.427444] rockchip,hdmiin: ASoC: error at __soc_pcm_open on rockchip,hdmiin: -19
[ 10.439714] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_audio_startup: device is no connected or audio is o
ff
[ 10.439765] hdmi-audio-codec hdmi-audio-codec.15.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -19
[ 10.439804] rockchip,hdmiin: ASoC: error at __soc_pcm_open on rockchip,hdmiin: -19
[ 10.471002] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.484601] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.501248] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.517859] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.520089] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 10.534541] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.551135] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.567886] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.584435] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.601091] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.617806] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.634520] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.651238] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.667891] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.684465] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.701119] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.717860] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 10.734435] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 11.313212] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 11.334892] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 11.367837] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 14.241288] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.756785] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 26.773474] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 26.821370] dwhdmi-rockchip fde80000.hdmi: Rate 181320000 missing; compute N dynamically
[ 26.823235] dwhdmi-rockchip fde80000.hdmi: Rate 181320000 missing; compute N dynamically
[ 26.851861] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_audio_startup: device is no connected or audio is o
ff
[ 26.851922] hdmi-audio-codec hdmi-audio-codec.15.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -19
[ 26.851966] rockchip,hdmiin: ASoC: error at __soc_pcm_open on rockchip,hdmiin: -19
[ 26.864202] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_audio_startup: device is no connected or audio is o
ff
[ 26.864251] hdmi-audio-codec hdmi-audio-codec.15.auto: ASoC: error at snd_soc_dai_startup on i2s-hifi: -19
[ 26.864289] rockchip,hdmiin: ASoC: error at __soc_pcm_open on rockchip,hdmiin: -19
[ 26.871886] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.884143] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.900807] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.917455] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.934045] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.936775] rk_hdmirx fdee0000.hdmirx-controller: hdmirx_cancel_cpu_limit_freq freq qos nod add
[ 26.950785] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.967333] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 26.984119] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.000791] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.017457] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.034125] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.050735] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.067419] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.084182] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.100900] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.117464] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.134222] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.357208] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.384377] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 27.417427] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 29.891446] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 29.917332] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 29.950774] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 30.034172] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_enable] Update mode to 4096x2160p60, type: 11(
if:800, flag:0x0) for vp0 dclk: 594000000
[ 30.034294] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx_ropll_cmn_config bus_width:5aa320 rate:1813200
[ 30.034557] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy pll locked!
[ 30.034649] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx_ropll_cmn_config bus_width:5aa320 rate:5940000
[ 30.034911] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy pll locked!
[ 30.051609] dwhdmi-rockchip fde80000.hdmi: final tmdsclk = 594000000
[ 30.162291] dwhdmi-rockchip fde80000.hdmi: don't use dsc mode
[ 30.162295] dwhdmi-rockchip fde80000.hdmi: dw hdmi qp use tmds mode
[ 30.162300] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: bus_width:0x5aa320,bit_rate:5940000
[ 30.162487] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy lane locked!
[ 30.185012] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 30.745555] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 63.357828] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 63.385000] dwhdmi-rockchip fde80000.hdmi: use tmds mode
[ 63.501892] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_enable] Update mode to 5120x2160p60, type: 11(
if:800, flag:0x0) for vp0 dclk: 742500000
[ 63.502011] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx_ropll_cmn_config bus_width:42625a00 rate:5940000
[ 63.502273] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy pll locked!
[ 63.520618] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx_ropll_cmn_config bus_width:42625a00 rate:5940000
[ 63.520880] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy pll locked!
[ 63.520935] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx_lcpll_cmn_config rate:40000000
[ 63.521175] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy pll locked!
[ 63.521180] dwhdmi-rockchip fde80000.hdmi: final tmdsclk = 371250000
[ 63.521209] dwhdmi-rockchip fde80000.hdmi: don't use dsc mode
[ 63.521214] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: bus_width:0x42625a00,bit_rate:40000000
[ 63.521407] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy lane locked!
[ 63.584274] dwhdmi-rockchip fde80000.hdmi: goto ltsp
[ 63.586706] dwhdmi-rockchip fde80000.hdmi: flt success