Date:   Wed, 13 Feb 2019 08:05:13 +0100 (CET)
From:   Stefan Wahren <stefan.wahren@i2se.com>
To:     Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Cc:     Stanislaw Gruszka <sgruszka@redhat.com>,
        Felix Fietkau <nbd@nbd.name>,
        Doug Anderson <dianders@chromium.org>,
        Minas Harutyunyan <hminas@synopsys.com>,
        linux-wireless <linux-wireless@vger.kernel.org>,
        linux-usb@vger.kernel.org
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Subject: Re: [BUG] mt76x0u: Probing issues on Raspberry Pi 3 B+
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Hi,

> Lorenzo Bianconi <lorenzo.bianconi@redhat.com> hat am 11. Februar 2019 um 16:57 geschrieben:
> 
> 
> > 
> > Compiling the mainline kernel with arm/multi_v7_defconfig it works.
> > Using the same kernel but with arm64/defconfig doesn't work. But i don't
> > think this is a 32/64 bit issue. The arm64 defconfig is much more
> > complex (e.g. enables more IOMMU stuff).
> 
> thx for the clarification :)
> 

i was busy to enable the mt76xx wifi driver in my build system. Usually i handle this via scripts/config but i didn't manage to enable the driver. Finally i gave up and enabled it via defconfig patch.

Here are my test results for Raspberry Pi 3 B+ (without any additional patches):

multi_v7_defconfig 5.0.0-rc6 -> firmware timeout
multi_v7_defconfig next-2019-02-12 -> firmware timeout
arm64_defconfig 5.0.0-rc6 -> vendor request 07: -110 (timeout)
arm64_defconfig next-2019-02-12 -> vendor request 07: -110 (timeout)

Shame on me for the wrong result before (assume to not properly cleanup the kernel modules on sd card). So there is no config option in arm64_defconfig which breaks mt76xx.

I will try the recent patches later.

Thanks
Stefan