Re: [PATCH 0/4] musb fixes for v4.9-rc cycle

[Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>]

Hi Tony,

On Wednesday 07 Dec 2016 21:51:23 Tony Lindgren wrote:
> * Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org> [161123 08:44]:
> > On Wednesday 23 Nov 2016 18:40:09 Tomi Valkeinen wrote:
> >> On 23/11/16 18:34, Tony Lindgren wrote:
> >>> OK. And what changes to your current .config make the
> >>> musb_bus_suspend() issues show up?
> >>> 
> >>> If it happens with USB-B cable from host to musb with musb set to host
> >>> only mode I'm not suprised there are errors :)
> >> 
> >> I have no USB cables connected. I have attached my config. If
> >> CONFIG_USB_MUSB_HDRC is disabled, the musb error goes away.
> > 
> > For what it's worth, that's exactly the same problem I experienced. See
> > https://www.spinics.net/lists/linux-usb/msg149172.html for an analysis.
> 
> The problem is that with the built-in musb configuration we're trying to
> set USB-B cable to host mode with ID pin not grounded. That's not going
> to work on most hardware unless the PHY can configure the ID pin.
> 
> Here's how to fix the .config for built-in musb:
> 
> 1. Change to have CONFIG_USB_GADGET=y
>
> 2. Then change CONFIG_USB_MUSB_DUAL_ROLE=y instead of CONFIG_USB_MUSB_HOST
>
> We should probably get rid of CONFIG_USB_MUSB_HOST to avoid this.

The reason I went for host mode is that I had to disable CONFIG_USB_GADGET as 
compiling it as a module prevents selecting CONFIG_NOP_USB_XCEIV=y, which is a 
dependency for CONFIG_USB_EHCI_HCD_OMAP=m.

config NOP_USB_XCEIV
        tristate "NOP USB Transceiver Driver"
        depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, NOP can't be 
built-in
        select USB_PHY

-- 
Regards,

Laurent Pinchart

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