linux-kernel - RE: [PATCH v2 0/7] Add the iMX8MP PCIe support

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Message-ID: <AS8PR04MB867606A1E2E45A0C0A1525A48CEA9@AS8PR04MB8676.eurprd04.prod.outlook.com>
Date:   Mon, 11 Apr 2022 03:32:34 +0000
From:   Hongxing Zhu <hongxing.zhu@....com>
To:     Lucas Stach <l.stach@...gutronix.de>,
        "tharvey@...eworks.com" <tharvey@...eworks.com>,
        Alexander Stein <alexander.stein@...tq-group.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Vinod Koul <vkoul@...nel.org>,
        "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
        Device Tree Mailing List <devicetree@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH v2 0/7] Add the iMX8MP PCIe support

> -----Original Message-----
> From: Lucas Stach <l.stach@...gutronix.de>
> Sent: 2022年4月8日 16:13
> To: Hongxing Zhu <hongxing.zhu@....com>; tharvey@...eworks.com;
> Alexander Stein <alexander.stein@...tq-group.com>
> Cc: Philipp Zabel <p.zabel@...gutronix.de>; bhelgaas@...gle.com; Lorenzo
> Pieralisi <lorenzo.pieralisi@....com>; Rob Herring <robh@...nel.org>; Shawn
> Guo <shawnguo@...nel.org>; Vinod Koul <vkoul@...nel.org>;
> linux-phy@...ts.infradead.org; Device Tree Mailing List
> <devicetree@...r.kernel.org>; linux-pci@...r.kernel.org; Linux ARM Mailing
> List <linux-arm-kernel@...ts.infradead.org>; open list
> <linux-kernel@...r.kernel.org>; Sascha Hauer <kernel@...gutronix.de>;
> dl-linux-imx <linux-imx@....com>
> Subject: Re: [PATCH v2 0/7] Add the iMX8MP PCIe support
> 
> Am Freitag, dem 08.04.2022 um 03:14 +0000 schrieb Hongxing Zhu:
> > >
> [...]
> > > Richard,
> > >
> > > Thanks for working on this!
> > >
> > > Do you plan on submitting another version soon? I've tried to test
> > > this with an imx8mp board I'm bringing up and while the host
> > > controller enumerates I fail to get a link to a device. It's very
> > > likely I am missing something as this series depends on the IMX8MP blk-ctrl
> and gpc series which I also can't cleanly apply.
> > > Lucas just submitted a 'consolidated i.MX8MP HSIO/MEDIA/HDMI
> > > blk-ctrl series' [1] yet I can't find a repo/branch that applies to either.
> > >
> > > Perhaps you have a git repo somewhere I can look at while we wait
> > > for imx8mp blk-ctl/gpc to settle and you to submit a v3?
> > Hi Tim:
> > Thanks for your kindly help to do the tests.
> > I had listed the dependencies in the cover-letter log.
> > Alexander and I used to test this series commits based on the V5.17 kernel.
> >
> > Lucas had provided some review comments and suggestions about the PLL
> > bits
> >  manipulations of HSIOMIX in i.MX8MP PCIe PHY driver #3 of this series.
> > And he suggested to let the HSIOMIX blk-ctrl make this PLL as a real
> > clock,
> >  and used by i.MX8MP PCIe PHY driver later.
> >
> > Although I have some confusions, it's better let's wating for the
> > blk-ctrl settle down and get clear discussion with Lucas later.
> > How do you think about that?
> 
> Just to let you know my plans: I was quite busy with getting the i.MX8MP
> HDMI part to work. Now that this is at least in a state where it can collect
> some feedback from upstream I have some time to circle back to this topic. I
> can't commit to do it immediately, but I'll get around to looking at the PCIe
> series a bit more in-depth and apply my HSIO PLL suggestion to the blk-ctrl
> driver during the next week.

Hi Lucas:
Thanks for your helpful reply.
I know that you're busy with the blk-ctrl settle down now, and had explained to
Tim.

Best Regards
Richard Zhu

> 
> Regards,
> Lucas