linux-kernel - Re: [PATCH 0/9] MIPS: CI20: Add WiFi / Bluetooth support

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Date:   Thu, 15 Jun 2023 10:45:34 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     list@...ndingux.net, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Conor Dooley <conor+dt@...nel.org>, linux-mips@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Subject: Re: [PATCH 0/9] MIPS: CI20: Add WiFi / Bluetooth support

Hi Paul,

> Am 15.06.2023 um 10:39 schrieb Paul Cercueil <paul@...pouillou.net>:
> 
> Hi Nikolaus,
> 
> Le 15 juin 2023 09:00, "H. Nikolaus Schaller" <hns@...delico.com> a écrit :
>> 
>> Hi Paul, 
>> I was in holidays and could not review this series earlier. 
>> 
>> 
>>> Am 04.06.2023 um 16:56 schrieb Paul Cercueil <paul@...pouillou.net>: 
>>> 
>>> Hi, 
>>> 
>>> Here's a set of patches to add support for the WiFi / Bluetooth chip on 
>>> the CI20. 
>>> 
>>> WiFi works pretty well, provided it is used with the latest firmware 
>>> provided by linux-firmware. Bluetooth does not work very well here, as 
>>> I cannot get my wireless keyboard to pair; but it does detect it, and it 
>>> does see they key presses when I type the pairing code. 
>>> 
>>> I only tested with a somewhat recent (~2022) Buildroot-based userspace. 
>>> I enabled WEXT compatibility because the CI20 is typically used with a 
>>> very old userspace, but I did not try to use it with old tools like 
>>> ifconfig/iwconfig. 
>> 
>> ^^^ great since not everyone is using memory hungry latest user-space and 
>> ifconfig/iwconfig is also available on some other OS so users like me 
>> can share scripts. 
>> 
>> 
>> But I had quite some issues with this series. 
>> 
>> 1. I could not boot my CI20 V2a board after applying the full series to v6.4-rc6 
>> 2. bisecting failed because vcc_33v is used in a patch preceding its definition 
>>    leading to DTC compile abort 
>> 3. after fixing I could bisect that "MIPS: DTS: CI20: Fix ACT8600 regulator node names" 
>>    is the first bad commit - although I don't see immediately why 
>> 
>> So this series seems to be severely broken and I could not even come to 
>> a test of WiFi and/or Bluetooth which the series claims to support. 
> 
> Well, that's strange. I can assure you it boots and works here.
> 
> Maybe it is a board difference; I have a non-square green board - so the earlier version.

Ok, my V2a is the bordeaux one. That may indeed make a difference.

> 
> Since this patch will actually make the various ACT8600 regulators work at their specified voltage, maybe the voltage on one of the updated regulators is wrong?
> 
> Maybe change the regulators one by one back to their old name, until you find the one that is problematic? That may give us more info.

That is what I also have though about but have not yet done.
Will try as soon as I find a time slot.

> 
>> Comments to some individual patches follow. 
> 
> Sorry about the vcc_33v. Honest mistake.
> 
> Thomas: are you able to drop this series from mips-next, or should I/we send fixup patches instead?

Well, mistakes happen.

Best regards,
Nikolaus

> 
> Cheers,
> -Paul
> 
>> Best regards and looking forward to a v2 for testing, 
>> Nikolaus 
>> 
>> 
>>> 
>>> Cheers, 
>>> -Paul 
>>> 
>>> Paul Cercueil (9): 
>>>   MIPS: DTS: CI20: Fix regulators 
>>>   MIPS: DTS: CI20: Fix ACT8600 regulator node names 
>>>   MIPS: DTS: CI20: Add parent supplies to ACT8600 regulators 
>> 
>> ^^^ should IMHO be a separate series since it is not directly related to WiFi / Bluetooth 
>> 
>>>   MIPS: DTS: CI20: Do not force-enable CIM and WiFi regulators 
>>>   MIPS: DTS: CI20: Misc. cleanups 
>> 
>> ^^^ these two do not compile 
>> The Misc. cleanups do not belong to this topic. 
>> 
>>>   MIPS: DTS: CI20: Parent MSCMUX clock to MPLL 
>> 
>> ^^^ this is only loosely related to Wifi / Bluetooth 
>> 
>>>   MIPS: DTS: CI20: Enable support for WiFi / Bluetooth 
>>>   MIPS: configs: CI20: Regenerate defconfig 
>>>   MIPS: configs: CI20: Enable WiFi / Bluetooth 
>>> 
>>> arch/mips/boot/dts/ingenic/ci20.dts | 148 +++++++++++++++++++--------- 
>>> arch/mips/configs/ci20_defconfig    |  47 ++++++--- 
>>> 2 files changed, 133 insertions(+), 62 deletions(-) 
>>> 
>>> -- 
>>> 2.39.2 
>>> 
>>