linux-kernel - Re: [PATCH 0/8] Enable EUD on Qualcomm sm8450 SoC

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Message-ID: <95e16e32-1f40-48a0-9c19-4a58e7d8b780@linaro.org>
Date: Thu, 1 Aug 2024 13:00:09 +0200
From: Caleb Connolly <caleb.connolly@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>,
 Elson Roy Serrao <quic_eserrao@...cinc.com>, andersson@...nel.org,
 konrad.dybcio@...aro.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, gregkh@...uxfoundation.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 0/8] Enable EUD on Qualcomm sm8450 SoC



On 01/08/2024 09:55, Krzysztof Kozlowski wrote:
> On 31/07/2024 13:13, Caleb Connolly wrote:
>> Hi,
>>
>> On 31/07/2024 00:24, Elson Roy Serrao wrote:
>>> The Embedded USB Debugger (EUD) is a mini High-Speed USB on-chip hub to
>>> support the USB-based debug and trace capabilities on Qualcomm devices.
>>> The current implementation lacks in below aspects that are needed for
>>> proper EUD functionality.
>>>
>>> 1.) HS-Phy control: EUD being a HS hub needs HS-Phy support for it's
>>>       operation. Hence EUD module should enable/disable HS-phy
>>>       accordingly.
>>> 	
>>> 2.) Proper routing of USB role switch notifications: EUD hub is physically
>>>       present in between the USB connector and the USB controller. So the
>>>       usb role switch notifications originating from the connector should
>>>       route through EUD. EUD also relies on role switch notifications to
>>>       communicate with the USB, regarding EUD attach/detach events.
>>>
>>> This series aims at implementing the above aspects to enable EUD on
>>> Qualcomm sm8450 SoC.
>>
>> Are there any plans to make this feature available for folks outside of
>> Qualcomm / an NDA?
>>
>> There is an openOCD fork on CodeLinaro but it still requires some
>> proprietary library which is only available to folks with a quicinc
>> email as I understand it.
> 
> Are you saying that there is no fully open and available user-space
> which is necessary to use EUD?

Yes, exactly. Tools must be obtained via the Qualcomm Package Manager 
which are not available by default after making an account and signing 
and NDA.

Kind regards,
> 
> Best regards,
> Krzysztof
> 

-- 
// Caleb (they/them)