MT7613BE: "mt7663_n9_v3.bin" vs "mt7663pr2h_rebb.bin" firmware?

[dsouza]

I'm running a master build on Archer C6 v3.2 (mt7631).

The 5Ghz Wi-Fi chipset of this device is an MT7613BEN.

The following message is currently displayed on dmesg:

(...)
[   13.618079] mt7615e 0000:02:00.0: mediatek/mt7663pr2h.bin not found, switching to mediatek/mt7663pr2h_rebb.bin
[   13.758271] mt7615e 0000:02:00.0: HW/SW Version: 0x65322d31, Build Time: 19091404338b809
[   13.758271] 
[   14.013127] mt7615e 0000:02:00.0: N9 Firmware Version: 7663mp1827, Build Time: 20190914043434
(...)

For testing pourposes, I've downloaed from Linux Kernel Firmware GIT the following files:

• mt7663pr2h.bin
• mt7663_n9_v3.bin

And copied these to files to the device directory /lib/firmware/mediatek/. After a reboot, the 5Ghz radio seems to be working fine, and the following messages are now displayed in dmesg:

(...)
[   11.890146] mt7615e 0000:02:00.0: HW/SW Version: 0x65326363, Build Time: 2006030247debug
[   11.890146] 
[   12.117059] mt7615e 0000:02:00.0: N9 Firmware Version: 3.1.1, Build Time: 20200604161656
(...)

It seems a newer firmware than the one included in the standar OpenWRT build.

Anyone could provide some insight if there is any advantage in using mt7663_n9_v3.bin firmware instead of mt7663pr2h_rebb.bin firmware with the MT7613BEN radio?

Thanks!

[nbd]

The v3 firmware is the same kind that's being packaged as kmod-mt7663-firmware-sta. It's optimized for low-power mobile designs and is unsuitable for use in normal AP mode devices.
Please use mt7663pr2h_rebb.bin firmware.