linux-kernel - Re: [GIT PULL 1/2] bcm2835-dt-fixes-2017-10-06

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Date:   Wed, 22 Nov 2017 09:07:45 +0100
From:   Loic Poulain <loic.poulain@...il.com>
To:     Peter Robinson <pbrobinson@...il.com>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Matt Hart <matt@...tface.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Eric Anholt <eric@...olt.net>
Subject: Re: [GIT PULL 1/2] bcm2835-dt-fixes-2017-10-06

Hi Peter,

> So it seems it's actually working fine albeit the strange mac addr, no
> idea what I was trying before, although there's an error about loading
> firmware:
>
> [   31.035291] Bluetooth: hci0: BCM: chip id 94
> [   31.035801] Bluetooth: hci0: BCM: features 0x2e
> [   31.037483] Bluetooth: hci0: BCM43430A1
> [   31.037498] Bluetooth: hci0: BCM43430A1 (001.002.009) build 0000
> [   31.037694] bluetooth hci0: Direct firmware load for
> brcm/BCM43430A1.hcd failed with error -2
> [   31.037704] Bluetooth: hci0: BCM: Patch brcm/BCM43430A1.hcd not found

Ok, think that's why you have this kind of 'default' address, you should be able
to provision a valid address with btmgmt tool. The chip can work
without applying
patch file, original firmware is then executed, which is potentially
more or less buggy.


> By adding a firmware [1] to the location it actually now stops
> working, although shows up with a hciconfig, and had the following
> errors.
>
> [   26.078038] Bluetooth: hci0: BCM: chip id 94
> [   26.096797] Bluetooth: hci0: BCM: features 0x2e
> [   28.130753] Bluetooth: hci0 command 0x0c14 tx timeout
> [   36.322725] Bluetooth: hci0: BCM: Reading local name failed (-110)

Really weird, because these steps are prior firmware loading, moreover on HCI
command timeout, the HCI core is supposed to retry sending of the command,
here nothing happened between [28.13] and [36.32]....

Could you please try to load hci_uart.ko manually after boot to see if it could
be related to some init timings/concurrency.


Regards,
Loic