[PATCH] ath10k: support bus and device specific API 1 BDF selection

Kalle Valo kvalo at kernel.org
Tue Dec 7 10:09:32 PST 2021

Kalle Valo <kvalo at kernel.org> writes:

> Robert Marko <robimarko at gmail.com> wrote:
>> Some ath10k IPQ40xx devices like the MikroTik hAP ac2 and ac3 require the
>> BDF-s to be extracted from the device storage instead of shipping packaged
>> API 2 BDF-s.
>> This is required as MikroTik has started shipping boards that require BDF-s
>> to be updated, as otherwise their WLAN performance really suffers.
>> This is however impossible as the devices that require this are release
>> under the same revision and its not possible to differentiate them from
>> devices using the older BDF-s.
>> In OpenWrt we are extracting the calibration data during runtime and we are
>> able to extract the BDF-s in the same manner, however we cannot package the
>> BDF-s to API 2 format on the fly and can only use API 1 to provide BDF-s on
>> the fly.
>> This is an issue as the ath10k driver explicitly looks only for the
>> board.bin file and not for something like board-bus-device.bin like it does
>> for pre-cal data.
>> Due to this we have no way of providing correct BDF-s on the fly, so lets
>> extend the ath10k driver to first look for BDF-s in the
>> board-bus-device.bin format, for example: board-ahb-a800000.wifi.bin
>> If that fails, look for the default board file name as defined previously.
>> Signed-off-by: Robert Marko <robimarko at gmail.com>
> Can someone review this, please? I understand the need for this, but the board
> handling is getting quite complex in ath10k so I'm hesitant.
> What about QCA6390 and other devices. Will they still work?

I meant QCA6174, of course. I have been working too much on ath11k.



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