ZBT-1326 OpenWRT stable 21.02 results in no Wifi

Dear,

I've installed the latest (stable) version of OpenWRT 21.02 for ZBT-1326
There is no wifi signal available neither in the menu of luci.
From the command line I've exported the dmesg

Nice to know is with installing "openwrt-ramips-mt7621-zbtlink_zbt-we1326-squashfs-sysupgrade" there is a wifi signal.

Till now for this device the "openwrt-18.06.6-ramips-mt7621-zbt-we1326-squashfs-sysupgrade" was the latest stable version where wifi worked proper on.

Did or do I something wrong, would love to use the newer versions of OpenWRT on this router

[    0.000000] Linux version 5.4.143 (builder@buildhost) (gcc version 8.4.0 (OpenWrt GCC 8.4.0 r16279-5cc0535800)) #0 SMP Tue Aug 31 22:20:08 2021
[    0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
[    0.000000] printk: bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 0001992f (MIPS 1004Kc)
[    0.000000] MIPS: machine is Zbtlink ZBT-WE1326
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] VPE topology {2,2} total 4
[    0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[    0.000000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[    0.000000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x000000000fffffff]
[    0.000000]   HighMem  [mem 0x0000000010000000-0x0000000023ffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000001bffffff]
[    0.000000]   node   0: [mem 0x0000000020000000-0x0000000023ffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000023ffffff]
[    0.000000] On node 0 totalpages: 131072
[    0.000000]   Normal zone: 576 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 65536 pages, LIFO batch:15
[    0.000000]   HighMem zone: 65536 pages, LIFO batch:15
[    0.000000] percpu: Embedded 14 pages/cpu s26768 r8192 d22384 u57344
[    0.000000] pcpu-alloc: s26768 r8192 d22384 u57344 alloc=14*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 130496
[    0.000000] Kernel command line: console=ttyS0,115200 rootfstype=squashfs,jffs2
[    0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[    0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[    0.000000] Writing ErrCtl register=00050290
[    0.000000] Readback ErrCtl register=00050290
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 507624K/524288K available (6087K kernel code, 204K rwdata, 748K rodata, 3700K init, 238K bss, 16664K reserved, 0K cma-reserved, 262144K highmem)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
[    0.000000] NR_IRQS: 256
[    0.000000] random: get_random_bytes called from 0x806e3a3c with crng_init=0
[    0.000000] CPU Clock: 880MHz
[    0.000000] clocksource: GIC: mask: 0xffffffffffffffff max_cycles: 0xcaf478abb4, max_idle_ns: 440795247997 ns
[    0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 4343773742 ns
[    0.000009] sched_clock: 32 bits at 440MHz, resolution 2ns, wraps every 4880645118ns
[    0.007840] Calibrating delay loop... 583.68 BogoMIPS (lpj=1167360)
[    0.042035] pid_max: default: 32768 minimum: 301
[    0.046827] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.054055] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.064831] rcu: Hierarchical SRCU implementation.
[    0.070373] smp: Bringing up secondary CPUs ...
[    5.927179] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[    5.927191] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[    5.927205] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[    5.927319] CPU1 revision is: 0001992f (MIPS 1004Kc)
[    0.103184] Synchronize counters for CPU 1: done.
[    5.995034] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[    5.995042] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[    5.995050] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[    5.995114] CPU2 revision is: 0001992f (MIPS 1004Kc)
[    0.167996] Synchronize counters for CPU 2: done.
[    6.049969] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[    6.049976] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[    6.049985] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[    6.050052] CPU3 revision is: 0001992f (MIPS 1004Kc)
[    0.225858] Synchronize counters for CPU 3: done.
[    0.255742] smp: Brought up 1 node, 4 CPUs
[    0.264223] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.273904] futex hash table entries: 1024 (order: 3, 32768 bytes, linear)
[    0.280943] pinctrl core: initialized pinctrl subsystem
[    0.288162] NET: Registered protocol family 16
[    0.300893] FPU Affinity set after 4688 emulations
[    0.318891] workqueue: max_active 576 requested for napi_workq is out of range, clamping between 1 and 512
[    0.330480] clocksource: Switched to clocksource GIC
[    0.337267] thermal_sys: Registered thermal governor 'step_wise'
[    0.337814] NET: Registered protocol family 2
[    0.348265] IP idents hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    0.356397] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[    0.364786] TCP established hash table entries: 2048 (order: 1, 8192 bytes, linear)
[    0.372397] TCP bind hash table entries: 2048 (order: 2, 16384 bytes, linear)
[    0.379486] TCP: Hash tables configured (established 2048 bind 2048)
[    0.385929] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.392417] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.399635] NET: Registered protocol family 1
[    0.403966] PCI: CLS 0 bytes, default 32
[    3.534451] 4 CPUs re-calibrate udelay(lpj = 1167360)
[    3.541415] workingset: timestamp_bits=14 max_order=17 bucket_order=3
[    3.556316] random: fast init done
[    3.564076] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    3.569853] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[    3.581224] bounce: pool size: 64 pages
[    3.585119] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[    3.594531] mt7621_gpio 1e000600.gpio: registering 32 gpios
[    3.600467] mt7621_gpio 1e000600.gpio: registering 32 gpios
[    3.606325] mt7621_gpio 1e000600.gpio: registering 32 gpios
[    3.612674] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[    3.622416] printk: console [ttyS0] disabled
[    3.626780] 1e000c00.uartlite: ttyS0 at MMIO 0x1e000c00 (irq = 19, base_baud = 3125000) is a 16550A
[    3.635769] printk: console [ttyS0] enabled
[    3.644046] printk: bootconsole [early0] disabled
[    3.656729] spi-mt7621 1e000b00.spi: sys_freq: 220000000
[    3.672680] spi-nor spi0.0: w25q128 (16384 Kbytes)
[    3.677542] 4 fixed-partitions partitions found on MTD device spi0.0
[    3.683881] Creating 4 MTD partitions on "spi0.0":
[    3.688673] 0x000000000000-0x000000030000 : "u-boot"
[    3.695180] 0x000000030000-0x000000040000 : "u-boot-env"
[    3.702037] 0x000000040000-0x000000050000 : "factory"
[    3.708488] 0x000000050000-0x000001000000 : "firmware"
[    3.721780] libphy: Fixed MDIO Bus: probed
[    3.752901] libphy: mdio: probed
[    3.756369] mt7530 mdio-bus:1f: MT7530 adapts as multi-chip module
[    3.766120] mtk_soc_eth 1e100000.ethernet eth0: mediatek frame engine at 0xbe100000, irq 22
[    3.776765] mt7621-pci 1e140000.pcie: Parsing DT failed
[    3.785145] NET: Registered protocol family 10
[    3.791276] Segment Routing with IPv6
[    3.795067] NET: Registered protocol family 17
[    3.799582] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[    3.812763] 8021q: 802.1Q VLAN Support v1.8
[    3.819240] mt7530 mdio-bus:1f: MT7530 adapts as multi-chip module
[    3.897057] libphy: dsa slave smi: probed
[    3.901599] mt7530 mdio-bus:1f lan1 (uninitialized): PHY [dsa-0.0:00] driver [Generic PHY]
[    3.911598] mt7530 mdio-bus:1f lan2 (uninitialized): PHY [dsa-0.0:01] driver [Generic PHY]
[    3.921495] mt7530 mdio-bus:1f lan3 (uninitialized): PHY [dsa-0.0:02] driver [Generic PHY]
[    3.931484] mt7530 mdio-bus:1f lan4 (uninitialized): PHY [dsa-0.0:03] driver [Generic PHY]
[    3.941519] mt7530 mdio-bus:1f wan (uninitialized): PHY [dsa-0.0:04] driver [Generic PHY]
[    3.951353] mt7530 mdio-bus:1f: configuring for fixed/rgmii link mode
[    3.962586] DSA: tree 0 setup
[    3.965908] rt2880-pinmux pinctrl: pcie is already enabled
[    3.971567] mt7621-pci-phy 1e149000.pcie-phy: PHY for 0xbe149000 (dual port = 1)
[    3.979169] mt7621-pci-phy 1e14a000.pcie-phy: PHY for 0xbe14a000 (dual port = 0)
[    4.086577] mt7621-pci-phy 1e149000.pcie-phy: Xtal is 40MHz
[    4.092154] mt7621-pci-phy 1e14a000.pcie-phy: Xtal is 40MHz
[    4.197658] mt7621-pci 1e140000.pcie: pcie0 no card, disable it (RST & CLK)
[    4.204609] mt7621-pci 1e140000.pcie: PCIE1 enabled
[    4.209476] mt7621-pci 1e140000.pcie: PCIE2 enabled
[    4.214351] mt7621-pci 1e140000.pcie: PCI coherence region base: 0x60000000, mask/settings: 0xf0000002
[    4.223812] mt7621-pci 1e140000.pcie: PCI host bridge to bus 0000:00
[    4.230167] pci_bus 0000:00: root bus resource [io  0x1e160000-0x1e16ffff]
[    4.237030] pci_bus 0000:00: root bus resource [mem 0x60000000-0x6fffffff]
[    4.243894] pci_bus 0000:00: root bus resource [bus 00-ff]
[    4.249411] pci 0000:00:00.0: [0e8d:0801] type 01 class 0x060400
[    4.255444] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x7fffffff]
[    4.261703] pci 0000:00:00.0: reg 0x14: [mem 0x60300000-0x6030ffff]
[    4.268032] pci 0000:00:00.0: supports D1
[    4.272037] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[    4.278165] pci 0000:00:01.0: [0e8d:0801] type 01 class 0x060400
[    4.284213] pci 0000:00:01.0: reg 0x10: [mem 0x00000000-0x7fffffff]
[    4.290475] pci 0000:00:01.0: reg 0x14: [mem 0x60310000-0x6031ffff]
[    4.296787] pci 0000:00:01.0: supports D1
[    4.300792] pci 0000:00:01.0: PME# supported from D0 D1 D3hot
[    4.307988] pci 0000:01:00.0: [14c3:7662] type 00 class 0x028000
[    4.314054] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x000fffff 64bit]
[    4.320868] pci 0000:01:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    4.327660] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold
[    4.335059] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
[    4.340289] pci 0000:00:00.0:   bridge window [io  0x0000-0x0fff]
[    4.346369] pci 0000:00:00.0:   bridge window [mem 0x60000000-0x600fffff]
[    4.353146] pci 0000:00:00.0:   bridge window [mem 0x60100000-0x601fffff pref]
[    4.360359] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
[    4.367206] pci 0000:02:00.0: [14c3:7603] type 00 class 0x028000
[    4.373253] pci 0000:02:00.0: reg 0x10: [mem 0x00000000-0x000fffff]
[    4.379649] pci 0000:02:00.0: PME# supported from D0 D3hot D3cold
[    4.387035] pci 0000:00:01.0: PCI bridge to [bus 02-ff]
[    4.392263] pci 0000:00:01.0:   bridge window [io  0x0000-0x0fff]
[    4.398344] pci 0000:00:01.0:   bridge window [mem 0x60200000-0x602fffff]
[    4.405133] pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 02
[    4.411794] pci 0000:00:00.0: BAR 0: no space for [mem size 0x80000000]
[    4.418392] pci 0000:00:00.0: BAR 0: failed to assign [mem size 0x80000000]
[    4.425341] pci 0000:00:01.0: BAR 0: no space for [mem size 0x80000000]
[    4.431941] pci 0000:00:01.0: BAR 0: failed to assign [mem size 0x80000000]
[    4.438891] pci 0000:00:00.0: BAR 8: assigned [mem 0x60000000-0x600fffff]
[    4.445667] pci 0000:00:00.0: BAR 9: assigned [mem 0x60100000-0x601fffff pref]
[    4.452876] pci 0000:00:01.0: BAR 8: assigned [mem 0x60200000-0x602fffff]
[    4.459654] pci 0000:00:00.0: BAR 1: assigned [mem 0x60300000-0x6030ffff]
[    4.466446] pci 0000:00:01.0: BAR 1: assigned [mem 0x60310000-0x6031ffff]
[    4.473223] pci 0000:00:00.0: BAR 7: assigned [io  0x1e160000-0x1e160fff]
[    4.480000] pci 0000:00:01.0: BAR 7: assigned [io  0x1e161000-0x1e161fff]
[    4.486787] pci 0000:01:00.0: BAR 0: assigned [mem 0x60000000-0x600fffff 64bit]
[    4.494090] pci 0000:01:00.0: BAR 6: assigned [mem 0x60100000-0x6010ffff pref]
[    4.501299] pci 0000:00:00.0: PCI bridge to [bus 01]
[    4.506256] pci 0000:00:00.0:   bridge window [io  0x1e160000-0x1e160fff]
[    4.513033] pci 0000:00:00.0:   bridge window [mem 0x60000000-0x600fffff]
[    4.519809] pci 0000:00:00.0:   bridge window [mem 0x60100000-0x601fffff pref]
[    4.527024] pci 0000:02:00.0: BAR 0: assigned [mem 0x60200000-0x602fffff]
[    4.533798] pci 0000:00:01.0: PCI bridge to [bus 02]
[    4.538764] pci 0000:00:01.0:   bridge window [io  0x1e161000-0x1e161fff]
[    4.545536] pci 0000:00:01.0:   bridge window [mem 0x60200000-0x602fffff]
[    4.552894] mt7530 mdio-bus:1f: Link is Up - 1Gbps/Full - flow control off
[    4.553316] hctosys: unable to open rtc device (rtc0)
[    4.580619] Freeing unused kernel memory: 3700K
[    4.585176] This architecture does not have kernel memory protection.
[    4.591600] Run /init as init process
[    5.029439] init: Console is alive
[    5.033450] init: - watchdog -
[    5.047148] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[    5.058040] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[    5.074841] init: - preinit -
[    5.219184] mtk_soc_eth 1e100000.ethernet eth0: configuring for fixed/rgmii link mode
[    5.227606] mtk_soc_eth 1e100000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[    5.236094] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[    5.303654] random: jshn: uninitialized urandom read (4 bytes read)
[    5.369890] random: jshn: uninitialized urandom read (4 bytes read)
[    5.447990] random: jshn: uninitialized urandom read (4 bytes read)
[    5.682221] mt7530 mdio-bus:1f lan1: configuring for phy/gmii link mode
[    5.689357] 8021q: adding VLAN 0 to HW filter on device lan1
[    7.746997] mt7530 mdio-bus:1f lan1: Link is Up - 100Mbps/Full - flow control off
[    7.754536] IPv6: ADDRCONF(NETDEV_CHANGE): lan1: link becomes ready
[    9.835313] mt7530 mdio-bus:1f lan1: Link is Down
[    9.850013] procd: - early -
[    9.853065] procd: - watchdog -
[   10.402638] procd: - watchdog -
[   10.406241] procd: - ubus -
[   10.416591] urandom_read: 6 callbacks suppressed
[   10.416605] random: ubusd: uninitialized urandom read (4 bytes read)
[   10.462170] procd: - init -
[   10.805355] kmodloader: loading kernel modules from /etc/modules.d/*
[   10.837267] xt_time: kernel timezone is -0000
[   10.855413] PPP generic driver version 2.4.2
[   10.861285] NET: Registered protocol family 24
[   10.876126] kmodloader: done loading kernel modules from /etc/modules.d/*
[   10.943657] urngd: v1.0.2 started.
[   11.078206] random: crng init done
[   37.474036] mtk_soc_eth 1e100000.ethernet eth0: Link is Down
[   37.489672] mtk_soc_eth 1e100000.ethernet eth0: configuring for fixed/rgmii link mode
[   37.498038] mtk_soc_eth 1e100000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[   37.505225] mt7530 mdio-bus:1f lan1: configuring for phy/gmii link mode
[   37.513812] 8021q: adding VLAN 0 to HW filter on device lan1
[   37.522821] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   37.530194] br-lan: port 1(lan1) entered blocking state
[   37.535550] br-lan: port 1(lan1) entered disabled state
[   37.542079] device lan1 entered promiscuous mode
[   37.546834] device eth0 entered promiscuous mode
[   37.580729] mt7530 mdio-bus:1f lan2: configuring for phy/gmii link mode
[   37.588088] 8021q: adding VLAN 0 to HW filter on device lan2
[   37.597443] br-lan: port 2(lan2) entered blocking state
[   37.602937] br-lan: port 2(lan2) entered disabled state
[   37.609769] device lan2 entered promiscuous mode
[   37.626291] mt7530 mdio-bus:1f lan3: configuring for phy/gmii link mode
[   37.634130] 8021q: adding VLAN 0 to HW filter on device lan3
[   37.645669] br-lan: port 3(lan3) entered blocking state
[   37.651048] br-lan: port 3(lan3) entered disabled state
[   37.658726] device lan3 entered promiscuous mode
[   37.677927] mt7530 mdio-bus:1f lan4: configuring for phy/gmii link mode
[   37.685375] 8021q: adding VLAN 0 to HW filter on device lan4
[   37.694676] br-lan: port 4(lan4) entered blocking state
[   37.700064] br-lan: port 4(lan4) entered disabled state
[   37.707178] device lan4 entered promiscuous mode
[   37.731274] mt7530 mdio-bus:1f wan: configuring for phy/gmii link mode
[   37.738670] 8021q: adding VLAN 0 to HW filter on device wan
[   39.555122] mt7530 mdio-bus:1f lan1: Link is Up - 100Mbps/Full - flow control off
[   39.562703] br-lan: port 1(lan1) entered blocking state
[   39.567981] br-lan: port 1(lan1) entered forwarding state
[   39.574861] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
[   39.651048] mt7530 mdio-bus:1f lan2: Link is Up - 100Mbps/Full - flow control off
[   39.658675] br-lan: port 2(lan2) entered blocking state
[   39.664084] br-lan: port 2(lan2) entered forwarding state
[   39.747131] mt7530 mdio-bus:1f lan4: Link is Up - 100Mbps/Full - flow control rx/tx
[   39.754941] br-lan: port 4(lan4) entered blocking state
[   39.760270] br-lan: port 4(lan4) entered forwarding state
[   40.802979] mt7530 mdio-bus:1f wan: Link is Up - 1Gbps/Full - flow control rx/tx
[   40.810471] IPv6: ADDRCONF(NETDEV_CHANGE): wan: link becomes ready
[   41.730985] mt7530 mdio-bus:1f lan3: Link is Up - 1Gbps/Full - flow control rx/tx
[   41.738547] br-lan: port 3(lan3) entered blocking state
[   41.743802] br-lan: port 3(lan3) entered forwarding state
[   57.090773] mt7530 mdio-bus:1f lan3: Link is Down
[   57.095949] br-lan: port 3(lan3) entered disabled state
[   60.162837] mt7530 mdio-bus:1f lan3: Link is Up - 1Gbps/Full - flow control rx/tx
[   60.170439] br-lan: port 3(lan3) entered blocking state
[   60.175668] br-lan: port 3(lan3) entered forwarding state