linux-kernel - RE: [PATCH v3] PCI: cadence: Retrain Link to work around Gen2 training defect.

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Date:   Tue, 1 Dec 2020 15:15:41 +0000
From:   Athani Nadeem Ladkhan <nadeem@...ence.com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh@...nel.org>
CC:     "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Tom Joseph <tjoseph@...ence.com>,
        Swapnil Kashinath Jakhade <sjakhade@...ence.com>,
        Milind Parab <mparab@...ence.com>
Subject: RE: [PATCH v3] PCI: cadence: Retrain Link to work around Gen2
 training defect.

Hi Kishon,

> -----Original Message-----
> From: Kishon Vijay Abraham I <kishon@...com>
> Sent: Thursday, November 26, 2020 7:28 PM
> To: Rob Herring <robh@...nel.org>
> Cc: Athani Nadeem Ladkhan <nadeem@...ence.com>;
> lorenzo.pieralisi@....com; bhelgaas@...gle.com; linux-
> pci@...r.kernel.org; linux-kernel@...r.kernel.org; Tom Joseph
> <tjoseph@...ence.com>; Swapnil Kashinath Jakhade
> <sjakhade@...ence.com>; Milind Parab <mparab@...ence.com>
> Subject: Re: [PATCH v3] PCI: cadence: Retrain Link to work around Gen2
> training defect.
> 
> EXTERNAL MAIL
> 
> 
> Hi Tom, Nadeem,
> 
> On 27/10/20 12:50 am, Rob Herring wrote:
> > On Fri, Oct 23, 2020 at 1:57 AM Kishon Vijay Abraham I <kishon@...com>
> wrote:
> >>
> >> Hi Nadeem,
> >>
> >> On 19/10/20 10:48 pm, Athani Nadeem Ladkhan wrote:
> >>> Hi Kishon,
> >>>
> >>>> -----Original Message-----
> >>>> From: Kishon Vijay Abraham I <kishon@...com>
> >>>> Sent: Monday, October 19, 2020 10:59 AM
> >>>> To: Athani Nadeem Ladkhan <nadeem@...ence.com>;
> >>>> lorenzo.pieralisi@....com; robh@...nel.org; bhelgaas@...gle.com;
> >>>> linux- pci@...r.kernel.org; linux-kernel@...r.kernel.org; Tom
> >>>> Joseph <tjoseph@...ence.com>
> >>>> Cc: Swapnil Kashinath Jakhade <sjakhade@...ence.com>; Milind Parab
> >>>> <mparab@...ence.com>
> >>>> Subject: Re: [PATCH v3] PCI: cadence: Retrain Link to work around
> >>>> Gen2 training defect.
> >>>>
> >>>> EXTERNAL MAIL
> >>>>
> >>>>
> >>>> Hi Nadeem,
> >>>>
> >>>> On 30/09/20 11:51 pm, Nadeem Athani wrote:
> >>>>> Cadence controller will not initiate autonomous speed change if
> >>>>> strapped as Gen2. The Retrain Link bit is set as quirk to enable
> >>>>> this speed
> >>>> change.
> >>>>>
> >>>>> Signed-off-by: Nadeem Athani <nadeem@...ence.com>
> 
> Do you have a follow-up patch fixing the review comments?
We planned to fix this in coming 3 weeks.
> 
> Thanks
> Kishon