linux-kernel - Re: [PATCH v1] arm64: dts: ti: k3-am62-main: disable usb lpm

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Message-ID: <20240212125402.GA5043@francesco-nb>
Date: Mon, 12 Feb 2024 13:54:02 +0100
From: Francesco Dolcini <francesco@...cini.it>
To: Roger Quadros <rogerq@...nel.org>
Cc: Andrejs Cainikovs <andrejs.cainikovs@...il.com>,
	Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
	Tero Kristo <kristo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Aswath Govindraju <a-govindraju@...com>,
	Sjoerd Simons <sjoerd@...labora.com>,
	Andrejs Cainikovs <andrejs.cainikovs@...adex.com>,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, "Bin Liu [EP]" <b-liu@...com>,
	"Gunasekaran, Ravi" <r-gunasekaran@...com>
Subject: Re: [PATCH v1] arm64: dts: ti: k3-am62-main: disable usb lpm

Hello Roger,

On Mon, Feb 12, 2024 at 02:13:56PM +0200, Roger Quadros wrote:
> On 09/02/2024 15:02, Andrejs Cainikovs wrote:
> > diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
> > index 464b7565d085..c49fbce5cb70 100644
> > --- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
> > +++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
> > @@ -663,6 +665,8 @@ usb1: usb@...00000 {
> >  			interrupt-names = "host", "peripheral";
> >  			maximum-speed = "high-speed";
> >  			dr_mode = "otg";
> > +			snps,usb2-gadget-lpm-disable;
> > +			snps,usb2-lpm-disable;
> 
> Instead of this could you please check if this series fixes the issue for you?
> https://lore.kernel.org/all/20240205141221.56076-1-rogerq@kernel.org/

Isn't this change correct despite whatever the test results on that
change are going to be? The manual is pretty adamant on LPM not being
supported by the AM62 SoC.

Francesco