From: Roger Quadros <rogerq@kernel.org>
To: Andrejs Cainikovs <andrejs.cainikovs@gmail.com>,
Nishanth Menon <nm@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>,
Tero Kristo <kristo@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Aswath Govindraju <a-govindraju@ti.com>,
Sjoerd Simons <sjoerd@collabora.com>
Cc: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1] arm64: dts: ti: k3-am62-main: disable usb lpm
Date: Wed, 14 Feb 2024 11:25:24 +0200 [thread overview]
Message-ID: <8fc9bac2-d0ce-4c24-b88b-fab1f65dcf37@kernel.org> (raw)
In-Reply-To: <20240209130213.38908-1-andrejs.cainikovs@gmail.com>
On 09/02/2024 15:02, Andrejs Cainikovs wrote:
> From: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
>
> AM62 USB works with some devices, while failing to operate with others.
>
> [ 560.189822] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller
> [ 560.195631] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned bus number 2
> [ 574.388509] xhci-hcd xhci-hcd.4.auto: can't setup: -110
> [ 574.393814] xhci-hcd xhci-hcd.4.auto: USB bus 2 deregistered
> [ 574.399544] xhci-hcd: probe of xhci-hcd.4.auto failed with error -110
>
> This seems to be related to LPM (Link Power Management), and disabling it
> turns USB into reliable working state.
>
> As per AM62 reference manual:
>
>> 4.8.2.1 USB2SS Unsupported Features
>>
>> The following features are not supported on this family of devices:
>> ...
>> - USB 2.0 ECN: Link Power Management (LPM)
>> ...
>
> Fixes: 2240f96cf3cd ("arm64: dts: ti: k3-am62-main: Add support for USB")
> Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
next prev parent reply other threads:[~2024-02-14 9:25 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-09 13:02 [PATCH v1] arm64: dts: ti: k3-am62-main: disable usb lpm Andrejs Cainikovs
2024-02-12 12:13 ` Roger Quadros
2024-02-12 12:54 ` Francesco Dolcini
2024-02-13 11:34 ` Roger Quadros
2024-02-14 9:46 ` Andrejs Cainikovs
2024-02-13 11:43 ` Francesco Dolcini
2024-02-14 9:25 ` Roger Quadros [this message]
2024-02-15 9:45 ` Vignesh Raghavendra
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