Embedded Linux version 5.10.96
The MIPI screen does not display anything.
Below extract from Kernal buffer
[ 0.040670] vcc_flash: 1800 mV, enabled
[ 0.040785] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.040793] vcc_flash: unable to resolve supply
[ 0.040798] reg-fixed-voltage flash-regulator: vcc_flash supplying 1800000uV
[ 0.040870] vcc_sys: 5000 mV, enabled
[ 0.040938] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.040945] vcc_flash: unable to resolve supply
[ 0.040949] reg-fixed-voltage vsys-regulator: vcc_sys supplying 5000000uV
[ 0.041109] reg-fixed-voltage vcc-mipi: Looking up vin-supply from device tree
[ 0.041151] vcc_mipi: supplied by vcc_sys
[ 0.041156] vcc_sys: could not add device link regulator.3: -ENOENT
[ 0.051792] vcc_mipi: 3300 mV, enabled
[ 0.051889] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.051897] vcc_flash: unable to resolve supply
[ 0.051902] reg-fixed-voltage vcc-mipi: vcc_mipi supplying 3300000uV
[ 0.052145] reg-fixed-voltage vcc-sata: Looking up vin-supply from device tree
[ 0.052153] vcc_sata: supplied by vcc_sys
[ 0.052158] vcc_sys: could not add device link regulator.4: -ENOENT
[ 0.052193] vcc_sata: 5000 mV, enabled
[ 0.052265] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.052272] vcc_flash: unable to resolve supply
[ 0.052277] reg-fixed-voltage vcc-sata: vcc_sata supplying 5000000uV
[ 0.052464] vcc_sd: 3300 mV, disabled
[ 0.052541] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.052548] vcc_flash: unable to resolve supply
[ 0.052553] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.052559] vcc_sd: unable to resolve supply
[ 0.052563] reg-fixed-voltage sdmmc-regulator: vcc_sd supplying 3300000uV
[ 0.052699] vcc_host: no parameters, enabled
[ 0.052778] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.052794] vcc_flash: unable to resolve supply
[ 0.052798] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.052805] vcc_sd: unable to resolve supply
[ 0.052809] reg-fixed-voltage vcc-host-regulator: vcc_host supplying 0uV
[ 0.052945] vcc_otg_5v: 5000 mV, enabled
[ 0.053016] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.053024] vcc_flash: unable to resolve supply
[ 0.053028] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.053035] vcc_sd: unable to resolve supply
[ 0.053039] reg-fixed-voltage usb-otg-regulator: vcc_otg_5v supplying 5000000uV
[ 0.053157] iommu: Default domain type: Translated
[ 0.054296] SCSI subsystem initialized
[ 0.054405] usbcore: registered new interface driver usbfs
[ 0.054430] usbcore: registered new interface driver hub
[ 0.054451] usbcore: registered new device driver usb
[ 0.054506] pps_core: LinuxPPS API ver. 1 registered
[ 0.054509] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti giometti@linux.it
[ 0.054520] PTP clock support registered
[ 0.054711] Advanced Linux Sound Architecture Driver Initialized.
[ 0.055236] clocksource: Switched to clocksource arch_sys_counter
[ 0.059462] NET: Registered protocol family 2
[ 0.059551] IP idents hash table entries: 16384 (order: 5, 131072 bytes, linear)
[ 0.060134] tcp_listen_portaddr_hash hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 0.060153] TCP established hash table entries: 8192 (order: 3, 32768 bytes, linear)
[ 0.060201] TCP bind hash table entries: 8192 (order: 5, 229376 bytes, linear)
[ 0.060329] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.060400] UDP hash table entries: 512 (order: 3, 32768 bytes, linear)
[ 0.060432] UDP-Lite hash table entries: 512 (order: 3, 32768 bytes, linear)
[ 0.060538] NET: Registered protocol family 1
[ 0.060992] hw perfevents: enabled with armv7_cortex_a12 PMU driver, 7 counters available
[ 0.061746] Initialise system trusted keyrings
[ 0.061822] workingset: timestamp_bits=30 max_order=18 bucket_order=0
[ 0.065254] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.065550] fuse: init (API version 7.32)
[ 0.109683] Key type asymmetric registered
[ 0.109688] Asymmetric key parser ‘x509’ registered
[ 0.109732] bounce: pool size: 64 pages
[ 0.109755] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 0.109759] io scheduler mq-deadline registered
[ 0.109762] io scheduler kyber registered
[ 0.109819] io scheduler bfq registered
[ 0.110420] phy phy-ff770000.syscon:usbphy.0: Looking up phy-supply from device tree
[ 0.110428] phy phy-ff770000.syscon:usbphy.0: Looking up phy-supply property in node /syscon@ff770000/usbphy/usb-phy@320 failed
[ 0.110497] phy phy-ff770000.syscon:usbphy.0: Looking up vbus-supply from device tree
[ 0.110502] phy phy-ff770000.syscon:usbphy.0: Looking up vbus-supply property in node /syscon@ff770000/usbphy/usb-phy@320 failed
[ 0.110693] phy phy-ff770000.syscon:usbphy.1: Looking up phy-supply from device tree
[ 0.110698] phy phy-ff770000.syscon:usbphy.1: Looking up phy-supply property in node /syscon@ff770000/usbphy/usb-phy@334 failed
[ 0.110747] phy phy-ff770000.syscon:usbphy.1: Looking up vbus-supply from device tree
[ 0.110752] phy phy-ff770000.syscon:usbphy.1: Looking up vbus-supply property in node /syscon@ff770000/usbphy/usb-phy@334 failed
[ 0.110937] phy phy-ff770000.syscon:usbphy.2: Looking up phy-supply from device tree
[ 0.110942] phy phy-ff770000.syscon:usbphy.2: Looking up phy-supply property in node /syscon@ff770000/usbphy/usb-phy@348 failed
[ 0.110989] phy phy-ff770000.syscon:usbphy.2: Looking up vbus-supply from device tree
[ 0.110994] phy phy-ff770000.syscon:usbphy.2: Looking up vbus-supply property in node /syscon@ff770000/usbphy/usb-phy@348 failed
[ 0.111687] pwm-backlight mipi-backlight: Looking up power-supply from device tree
[ 0.112531] dma-pl330 ff250000.dma-controller: WARN: Device release is not defined so it is not safe to unbind this driver while in use
[ 0.113218] dma-pl330 ff250000.dma-controller: Loaded driver for PL330 DMAC-241330
[ 0.113224] dma-pl330 ff250000.dma-controller: DBUFF-128x8bytes Num_Chans-8 Num_Peri-20 Num_Events-16
[ 0.113470] dma-pl330 ffb20000.dma-controller: WARN: Device release is not defined so it is not safe to unbind this driver while in use
[ 0.113683] dma-pl330 ffb20000.dma-controller: Loaded driver for PL330 DMAC-241330
[ 0.113688] dma-pl330 ffb20000.dma-controller: DBUFF-64x8bytes Num_Chans-5 Num_Peri-6 Num_Events-10
[ 0.113907] rockchip-iodomain ff770000.syscon:io-domains: Looking up lcdc-supply from device tree
[ 0.114228] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 0.115205] ff690000.serial: ttyS2 at MMIO 0xff690000 (irq = 44, base_baud = 1500000) is a 16550A
[ 0.115303] printk: console [ttyS2] enabled
[ 0.115820] ff1b0000.serial: ttyS3 at MMIO 0xff1b0000 (irq = 45, base_baud = 1500000) is a 16550A
[ 0.116197] i2c /dev entries driver
[ 0.119403] act8865 0-005a: Looking up vp1-supply from device tree
[ 0.119414] VCC_DDR: supplied by vcc_sys
[ 0.119419] vcc_sys: could not add device link regulator.8: -ENOENT
[ 0.121433] VCC_DDR: 1200 <–> 1500 mV at 1500 mV, enabled
[ 0.122017] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.122026] vcc_flash: unable to resolve supply
[ 0.122032] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.122039] vcc_sd: unable to resolve supply
[ 0.122554] act8865 0-005a: Looking up vp2-supply from device tree
[ 0.122561] VCC_IO: supplied by vcc_sys
[ 0.122565] vcc_sys: could not add device link regulator.9: -ENOENT
[ 0.124067] VCC_IO: 3300 mV, enabled
[ 0.124638] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.124646] vcc_flash: unable to resolve supply
[ 0.124651] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.124658] vcc_sd: unable to resolve supply
[ 0.125178] act8865 0-005a: Looking up vp3-supply from device tree
[ 0.125185] VDD_LOG: supplied by vcc_sys
[ 0.125189] vcc_sys: could not add device link regulator.10: -ENOENT
[ 0.127199] VDD_LOG: 950 <–> 1400 mV at 1200 mV, enabled
[ 0.127774] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.127783] vcc_flash: unable to resolve supply
[ 0.127787] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.127794] vcc_sd: unable to resolve supply
[ 0.128314] act8865 0-005a: Looking up vp4-supply from device tree
[ 0.128321] VCC_20: supplied by vcc_sys
[ 0.128328] vcc_sys: could not add device link regulator.11: -ENOENT
[ 0.129833] VCC_20: 2000 mV, enabled
[ 0.130402] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.130411] vcc_flash: unable to resolve supply
[ 0.130415] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.130422] vcc_sd: unable to resolve supply
[ 0.130941] act8865 0-005a: Looking up inl1-supply from device tree
[ 0.130950] VCCIO_SD: supplied by VCC_IO
[ 0.130954] VCC_IO: could not add device link regulator.12: -ENOENT
[ 0.133456] VCCIO_SD: 1800 <–> 3300 mV at 3300 mV, enabled
[ 0.134028] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.134037] vcc_flash: unable to resolve supply
[ 0.134041] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.134048] vcc_sd: unable to resolve supply
[ 0.134571] act8865 0-005a: Looking up inl1-supply from device tree
[ 0.134580] VDD10_LCD: supplied by VCC_IO
[ 0.134587] VCC_IO: could not add device link regulator.13: -ENOENT
[ 0.136584] VDD10_LCD: 1000 mV, enabled
[ 0.137150] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.137178] vcc_flash: unable to resolve supply
[ 0.137184] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.137191] vcc_sd: unable to resolve supply
[ 0.137717] act8865 0-005a: Looking up inl1-supply from device tree
[ 0.137726] VCCA_CODEC: supplied by VCC_IO
[ 0.137730] VCC_IO: could not add device link regulator.14: -ENOENT
[ 0.139746] VCCA_CODEC: 3300 mV, enabled
[ 0.140322] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.140331] vcc_flash: unable to resolve supply
[ 0.140335] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.140342] vcc_sd: unable to resolve supply
[ 0.140870] act8865 0-005a: Looking up inl2-supply from device tree
[ 0.140877] VCCA_TP: supplied by vcc_sys
[ 0.140881] vcc_sys: could not add device link regulator.15: -ENOENT
[ 0.142393] VCCA_TP: 3300 mV, enabled
[ 0.142960] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.142968] vcc_flash: unable to resolve supply
[ 0.142972] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.142979] vcc_sd: unable to resolve supply
[ 0.143503] act8865 0-005a: Looking up inl2-supply from device tree
[ 0.143510] VCCIO_PMU: supplied by vcc_sys
[ 0.143514] vcc_sys: could not add device link regulator.16: -ENOENT
[ 0.145031] VCCIO_PMU: 3300 mV, enabled
[ 0.145606] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.145615] vcc_flash: unable to resolve supply
[ 0.145620] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.145627] vcc_sd: unable to resolve supply
[ 0.146151] act8865 0-005a: Looking up inl3-supply from device tree
[ 0.146177] VDD_10: supplied by VCC_20
[ 0.146182] VCC_20: could not add device link regulator.17: -ENOENT
[ 0.148187] VDD_10: 1000 mV, enabled
[ 0.148763] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.148771] vcc_flash: unable to resolve supply
[ 0.148776] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.148782] vcc_sd: unable to resolve supply
[ 0.149310] act8865 0-005a: Looking up inl3-supply from device tree
[ 0.149319] VCC_18: supplied by VCC_20
[ 0.149323] VCC_20: could not add device link regulator.18: -ENOENT
[ 0.151336] VCC_18: 1800 mV, enabled
[ 0.151905] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.151913] vcc_flash: unable to resolve supply
[ 0.151918] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.151925] vcc_sd: unable to resolve supply
[ 0.152453] act8865 0-005a: Looking up inl3-supply from device tree
[ 0.152462] VCC18_LCD: supplied by VCC_20
[ 0.152466] VCC_20: could not add device link regulator.19: -ENOENT
[ 0.154468] VCC18_LCD: 1800 mV, enabled
[ 0.155042] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.155051] vcc_flash: unable to resolve supply
[ 0.155055] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.155062] vcc_sd: unable to resolve supply
[ 0.156396] fan53555-regulator 0-0040: FAN53555 Option[8] Rev[1] Detected!
[ 0.157886] fan53555-regulator 0-0040: Looking up vin-supply from device tree
[ 0.157894] vdd_cpu: supplied by vcc_sys
[ 0.157900] vcc_sys: could not add device link regulator.20: -ENOENT
[ 0.161305] vdd_cpu: 850 <–> 1500 mV at 1350 mV, enabled
[ 0.161897] reg-fixed-voltage flash-regulator: Looking up vin-supply from device tree
[ 0.161907] vcc_flash: supplied by VCC_IO
[ 0.162434] reg-fixed-voltage sdmmc-regulator: Looking up vin-supply from device tree
[ 0.162443] vcc_sd: supplied by VCC_IO
[ 0.164314] fan53555-regulator 0-0041: FAN53555 Option[8] Rev[1] Detected!
[ 0.164342] random: fast init done
[ 0.165803] fan53555-regulator 0-0041: Looking up vin-supply from device tree
[ 0.165810] vdd_gpu: supplied by vcc_sys
[ 0.165815] vcc_sys: could not add device link regulator.21: -ENOENT
[ 0.169212] vdd_gpu: 850 <–> 1350 mV at 950 mV, enabled
[ 0.172227] rockchip-vop ff930000.vop: Adding to iommu group 0
[ 0.172413] rockchip-vop ff940000.vop: Adding to iommu group 1
[ 0.173039] panel-urt-umo-p076md-t ff960000.mipi.0: Looking up power-supply from device tree