linux-kernel - Re: [PATCH] usb: dwc3: disable USB core PHY management

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Message-ID: <Ywfv9bNVx2l1n//z@google.com>
Date:   Thu, 25 Aug 2022 14:56:05 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: dwc3: disable USB core PHY management

On Thu, Aug 25, 2022 at 03:18:36PM +0200, Johan Hovold wrote:
> The dwc3 driver manages its PHYs itself so the USB core PHY management
> needs to be disabled.
> 
> Use the struct xhci_plat_priv hack added by commits 46034a999c07 ("usb:
> host: xhci-plat: add platform data support") and f768e718911e ("usb:
> host: xhci-plat: add priv quirk for skip PHY initialization") to
> propagate the setting for now.
> 
> Fixes: 4e88d4c08301 ("usb: add a flag to skip PHY initialization to struct usb_hcd")
> Fixes: 178a0bce05cb ("usb: core: hcd: integrate the PHY wrapper into the HCD core")
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
Tested-by: Matthias Kaehlcke <mka@...omium.org>

(tested on sc7x80 with '[gcc_]usb30_prim_gdsc' set to ALWAYS_ON)