linux-kernel - Re: [PATCH v2, 1/3] dt-bindings: usb: dwc3: Add snps,p2p3tranok quirk

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Message-ID: <9c665afe-16d7-469e-ac3e-d0d7388a31b7@kernel.org>
Date: Tue, 4 Jun 2024 08:33:19 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: joswang <joswang1221@...il.com>, Thinh.Nguyen@...opsys.com,
 robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org
Cc: gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
 linux-kernel@...r.kernel.org, balbi@...nel.org, devicetree@...r.kernel.org,
 joswang <joswang@...ovo.com>
Subject: Re: [PATCH v2, 1/3] dt-bindings: usb: dwc3: Add snps,p2p3tranok quirk

On 03/06/2024 15:00, joswang wrote:
> From: joswang <joswang@...ovo.com>

Is this your full name or known identity you want to use for all kernel
contributions? Looks like login...

> 
> There is an issue with the DWC31 2.00a and earlier versions
> where the controller link power state transition from
> P3/P3CPM/P4 to P2 may take longer than expected, ultimately
> resulting in the hibernation D3 entering time exceeding the
> expected 10ms.
> 
> Add a new 'snps,p2p3tranok-quirk' DT quirk to dwc3 core
> for enable the controller transitions directly from phy
> power state P2 to P3 or from state P3 to P2.
> 
> Note that this can only be set if the USB3 PHY supports
> direct p3 to p2 or p2 to p3 conversion.
> 
> Signed-off-by: joswang <joswang@...ovo.com>
> ---
>  Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> index 1cd0ca90127d..721927495887 100644
> --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> @@ -242,6 +242,13 @@ properties:
>        When set, all HighSpeed bus instances in park mode are disabled.
>      type: boolean
>  
> +  snps,p2p3tranok-quirk:

Why this cannot be deduced from compatible? Which upstream SoCs are
affected?



Best regards,
Krzysztof