linux-kernel - Re: [PATCH 0/5] usb: dwc3: xhci: Add quirk for defective Port Enable/disable

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Message-ID: <87egb8exy7.fsf@intel.com>
Date:	Fri, 18 Mar 2016 15:07:44 +0200
From:	Felipe Balbi <balbi@...nel.org>
To:	Roger Quadros <rogerq@...com>, mathias.nyman@...ux.intel.com
Cc:	nsekhar@...com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, Roger Quadros <rogerq@...com>
Subject: Re: [PATCH 0/5] usb: dwc3: xhci: Add quirk for defective Port Enable/disable


Mathias,

Roger Quadros <rogerq@...com> writes:
> Some devices from Texas Instruments suffer from
> a silicon bug where XHCI Port Enabled/Disabled bit
> should not be used to silence an erroneous device.
>     
> The bug is so that if port is disabled with PED
> bit, an IRQ for device removal (or attachment)
> will never fire.
>     
> Just for the sake of completeness, the actual
> problem lies with SNPS DWC3 USB IP and this affects
> all known versions up to 3.00a
>
> We add a BROKEN_PE quirk in xhci.h to deal with this issue
> and add a corresponding bit in xhci platform_data.
>
> I've only updated Felipe's e-mail id in the patches
> and re-based them to v4.5 + balbi/next.
>
> --
> cheers,
> -roger
>
> Felipe Balbi (5):
>   usb: xhci: add quirk flag for broken PED bits
>   usb: dwc3: core: define macros for newest revisions
>   usb: host: xhci: add broken pe quirk flag to pdata
>   usb: host: xhci-plat: enable BROKEN_PE quirk if platform requested
>   usb: dwc3: host: pass BROKEN_PE flag for known broken revisions

this series has changes on both dwc3 and xhci. Let me know how you wanna
handle these.

-- 
balbi

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