Re: [PATCH v1 0/6] arm64: dts: verdin-imx8mp: usb dual-role switching et. al.

From: Shawn Guo <shawnguo@kernel.org>
To: Marcel Ziswiler <marcel@ziswiler.com>
Cc: linux-arm-kernel@lists.infradead.org,
	Peter Chen <peter.chen@kernel.org>,
	Marcel Ziswiler <marcel.ziswiler@toradex.com>,
	Fabio Estevam <festevam@gmail.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Max Krummenacher <max.krummenacher@toradex.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Philippe Schenker <philippe.schenker@toradex.com>,
	Rob Herring <robh+dt@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 0/6] arm64: dts: verdin-imx8mp: usb dual-role switching et. al.
Date: Fri, 11 Nov 2022 13:48:56 +0800	[thread overview]
Message-ID: <20221111054856.GE2649582@dragon> (raw)
In-Reply-To: <20221102131203.35648-1-marcel@ziswiler.com>

On Wed, Nov 02, 2022 at 02:11:57PM +0100, Marcel Ziswiler wrote:
> From: Marcel Ziswiler <marcel.ziswiler@toradex.com>
> 
> 
> This series is an assortment of USB dual-role specific commits as
> follows:
> 
> Improvement of pinctrl for vbus-supplies:
> As we are using two fixed regulators for Verdin USB_1_EN (SODIMM 155)
> and Verdin USB_2_EN (SODIMM 185), those should be muxed as GPIOs rather
> than OTG_PWR.
> 
> Removal of USB_2 over-current detection disabling:
> The disable-over-current property is only applicable for the
> ci-hdrc-usb2 and dwc2 drivers while the i.MX 8M Plus integrates dwc3
> IP. Therefore remove this property which does not really serve any
> purpose here.
> 
> Addition of USB_1 over-current detection:
> Add Verdin USB_1 over-current detection functionality via Verdin
> USB_1_OC# (SODIMM 157) being active-low and removing its previous
> gpio_hog3 mapping.
> 
> Disabling of USB port power controls:
> Disable port power control on Verdin USB_1/2 as we use regular
> fixed-regulators with Verdin USB_1/2_EN as enable GPIOs.
> 
> Addition of GPIO USB-B connector:
> Add GPIO USB-B connector (gpio-usb-b-connector) functionality using
> Verdin USB_1_ID.
> 
> Marking USB_2 as permanently attached:
> As both Dahlia and the Verdin Development Board have on-carrier
> permanently attached USB hubs mark Verdin USB_2 as such.
> 
> Note:
> Currently, I am still seeing a rare race condition of sorts when booting
> the system with Verdin USB_1 as a host port with a USB memory stick
> plugged in. This exact patch series applied on top of NXP's latest
> downstream 5.15.52_2.1.0 release (together with backporting a few more
> dwc3-specific patches) actually makes this same use case work very
> reliably. However, NXP also keeps further downstream-only patches which
> I plan to further investigate and hopefully upstream a proper fix for
> soon.

Thanks for the noting!

> 
> 
> Marcel Ziswiler (6):
>   arm64: dts: verdin-imx8mp: improve pinctrl for vbus-supplies
>   arm64: dts: verdin-imx8mp: remove usb_2 over-current detection
>     disabling
>   arm64: dts: verdin-imx8mp: add usb_1 over-current detection
>   arm64: dts: verdin-imx8mp: disable usb port power control
>   arm64: dts: verdin-imx8mp: add gpio usb-b connector
>   arm64: dts: verdin-imx8mp: dahlia: mark usb_2 permanently attached

Applied all, thanks!

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