linux-kernel - Re: [PATCH] arm64: tegra: Enable IOMMU for host1x on Tegra132

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Message-ID: <fa2f0e13-1576-7985-5702-80cba3ecb17f@ansari.sh>
Date:   Wed, 16 Aug 2023 21:09:49 +0100
From:   Rayyan Ansari <rayyan@...ari.sh>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     linux-tegra@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jonathan Hunter <jonathanh@...dia.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: tegra: Enable IOMMU for host1x on Tegra132

On 16/08/2023 20:56, Rayyan Ansari wrote:
> On 16/08/2023 17:24, Thierry Reding wrote:
>> On Thu, Aug 10, 2023 at 10:45:41PM +0100, Rayyan Ansari wrote:
>>> Add the iommu property to the host1x node to register it with its
>>> swgroup.
>>>
>>> Signed-off-by: Rayyan Ansari <rayyan@...ari.sh>
>>> ---
>>>   arch/arm64/boot/dts/nvidia/tegra132.dtsi | 2 ++
>>>   1 file changed, 2 insertions(+)
>>
>> Do you happen to have a Tegra132 device that you can test upstream Linux
>> on? Just asking out of curiosity because these devices are becoming very
>> rare these days and it'd be good to know if people are still using these
>> and that recent Linux kernels are still running on them.
> 
> I do - I have the Nexus 9. At some point I was trying to mainline it, 
> but I stopped as I couldn't manage to get USB working - I only got 
> simplefb working. If it would be useful I could see if my old patches 
> work now and submit them.

I looked through my old notes and I was able to get USB host mode (ie 
USB OTG) working but not USB device mode.

> 
>>
>> Thierry
> 

-- 
Rayyan Ansari
https://ansari.sh