[BPI-R4] any plans for jumbo frame support?

Banana Pi Router design BPI-R4(MT7988)
1

As a high-performance (10g) routing device, it seems normal the bpi-r4 would support at least 4k ethernet frames. Unfortunately, current settings seem disappointing:

root@OpenWrt:~# ip -d link list | grep mtu
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 promiscuity 0 allmulti 0 minmtu 0 maxmtu 0 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 tso_max_size 524280 tso_max_segs 65535 gro_max_size 65536
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1504 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 76:da:d6:19:d3:bf brd ff:ff:ff:ff:ff:ff promiscuity 5 allmulti 4 minmtu 68 maxmtu 2026 numtxqueues 16 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 tso_max_size 65536 tso_max_segs 65535 gro_max_size 65536 parentbus platform parentdev 15100000.ethernet
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br-lan state UP mode DEFAULT group default qlen 1000
    link/ether 9e:8a:e4:c4:60:0b brd ff:ff:ff:ff:ff:ff promiscuity 1 allmulti 1 minmtu 68 maxmtu 2026
4: eth2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master br-lan state DOWN mode DEFAULT group default qlen 1000                                link/ether c2:20:34:c4:c2:0b brd ff:ff:ff:ff:ff:ff promiscuity 1 allmulti 1 minmtu 68 maxmtu 2026                                                   
5: wan@eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue master br-lan state LOWERLAYERDOWN mode DEFAULT group default qlen 1000             link/ether 76:da:d6:19:d3:bf brd ff:ff:ff:ff:ff:ff promiscuity 1 allmulti 1 minmtu 68 maxmtu 15338
6: lan1@eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue master br-lan state LOWERLAYERDOWN mode DEFAULT group default qlen 1000
    link/ether 76:da:d6:19:d3:bf brd ff:ff:ff:ff:ff:ff promiscuity 1 allmulti 1 minmtu 68 maxmtu 15338
7: lan2@eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue master br-lan state LOWERLAYERDOWN mode DEFAULT group default qlen 1000            link/ether 76:da:d6:19:d3:bf brd ff:ff:ff:ff:ff:ff promiscuity 1 allmulti 1 minmtu 68 maxmtu 15338
8: lan3@eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue master br-lan state LOWERLAYERDOWN mode DEFAULT group default qlen 1000
    link/ether 76:da:d6:19:d3:bf brd ff:ff:ff:ff:ff:ff promiscuity 1 allmulti 1 minmtu 68 maxmtu 15338                                                  
9: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000                                                          link/ether 88:c9:b3:b0:b9:8d brd ff:ff:ff:ff:ff:ff promiscuity 0 allmulti 0 minmtu 68 maxmtu 9194 numtxqueues 1 numrxqueues 1 gso_max_size 64000 gso_max_segs 64 tso_max_size 64000 tso_max_segs 64 gro_max_size 65536 parentbus pci parentdev 0001:03:00.0                                                 
10: eth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 88:c9:b3:b0:b9:8e brd ff:ff:ff:ff:ff:ff promiscuity 0 allmulti 0 minmtu 68 maxmtu 9194 numtxqueues 1 numrxqueues 1 gso_max_size 64000 gso_max_segs 64 tso_max_size 64000 tso_max_segs 64 gro_max_size 65536 parentbus pci parentdev 0001:04:00.0
11: br-lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether 76:da:d6:19:d3:bf brd ff:ff:ff:ff:ff:ff promiscuity 0 allmulti 0 minmtu 68 maxmtu 65535

Eth3 + 4 are pci rtl8125 devices, so not a part of the default config, but the maxmtu of the normal devices seems disappointing … Is this a feature that can be added to the driver later on? Or is it final?

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