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

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Message-ID: <1fcace72-a886-49bc-a30a-fde5a1de7a25@kernel.org>
Date: Thu, 1 Aug 2024 09:55:31 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Caleb Connolly <caleb.connolly@...aro.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 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?

Best regards,
Krzysztof