linux-kernel - RE: [PATCH V8 0/4] soc: imx: add i.MX BLK-CTL support

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Date:   Fri, 2 Jul 2021 03:24:40 +0000
From:   Peng Fan <peng.fan@....com>
To:     Frieder Schrempf <frieder.schrempf@...tron.de>,
        Marek Vasut <marex@...x.de>, Adam Ford <aford173@...il.com>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>
CC:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Lucas Stach <l.stach@...gutronix.de>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Guido Günther <agx@...xcpu.org>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        devicetree <devicetree@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jacky Bai <ping.bai@....com>, Abel Vesa <abel.vesa@....com>,
        Jagan Teki <jagan@...rulasolutions.com>
Subject: RE: [PATCH V8 0/4] soc: imx: add i.MX BLK-CTL support

All,

> Subject: Re: [PATCH V8 0/4] soc: imx: add i.MX BLK-CTL support
> 
> On 30.06.21 19:20, Frieder Schrempf wrote:
> > On 30.06.21 18:28, Marek Vasut wrote:
> >> On 6/30/21 4:46 PM, Frieder Schrempf wrote:
> >>> On 30.06.21 14:09, Adam Ford wrote:
> >>>> On Wed, Jun 30, 2021 at 4:34 AM Peng Fan (OSS)
> <peng.fan@....nxp.com> wrote:
> >>>>>
> >>>>>> Subject: Re: [PATCH V8 0/4] soc: imx: add i.MX BLK-CTL support
> >>>>>>
> >>>>>> On Tue, Jun 29, 2021 at 1:56 AM Peng Fan (OSS)
> >>>>>> <peng.fan@....nxp.com>
> >>>>>> wrote:
> >>>>>>>
> >>>>>>> From: Peng Fan <peng.fan@....com>
> >>>>>>>
> >>>>>>> V8:
> >>>>>>> Revert one change in v7, force goto disable_clk for handshake
> >>>>>>> when power on in patch 3 One minor update to use if{} else {},
> >>>>>>> not if{}; if{}; in patch 3 Typo Hankshake->Handshake
> >>>>>>>
> >>>>>> I am using ATF, branch lf_v2.4, from the NXP code aurora repo
> >>>>>> with U-Boot
> >>>>>> v2021.07-rc5
> >>>>>>
> >>>>>> I applied this patch against linux-next, I applied the pgc
> >>>>>> patches [1], and the suggested power-domains to the otg1 and otg2
> nodes.
> >>>>>> I am able to boot the device and use USB, but with this applied,
> >>>>>> I cannot wake from sleep.  If I revert this, the system wakes from
> sleep again.
> >>>>>
> >>>>> I just tried linux-next without this patch on iMX8MM EVK,
> >>>>> suspend/resume not work. Per my last test, it works before. Not sure
> what changed in kernel.
> >>>>>
> >>>>> Which kernel are you using, any commit or git repo? I could try on
> >>>>> imx8mm evk and debug the issue you see.
> >>>>
> >>>> I used kernel-next,
> >>>> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> >>>> commit 889bab4c367a0ef58208fd80fafa74bb6e2dca26 (tag:
> >>>> next-20210621)
> >>>>
> >>>> I then applied the GPCv2 patch that Marek sent.  You were CC'd on
> >>>> the e-mail from Marek, but I can forward the patch to you if you
> >>>> can't find it.
> >>>> I tested his patch and I was able to suspend-to-RAM and resume.
> >>>> Once I was comfortable that it worked, I then applied your patch
> >>>> series for the blk-ctl.
> >>>> With the blk-ctl series applied, the suspend-resume stopped working.
> >>>
> >>> Same here. I tested with linux-next-20210629 and as soon as I add the
> BLK-CTL driver and devicetree nodes, the resume after suspend causes a
> lockup each time.
> >>
> >> btw do you have etnaviv enabled ?
> >
> > yes, but I can try without and see if it's related.
> 
> It looks like the issue is not GPU-related. It appears once I add the
> pgc_dispmix, pgc_mipi and dispmix_blk_ctl nodes to the dt (even without any
> users, so lcdif and dsim are disabled). Once I remove the three nodes the
> issue is gone.


I have an updated code here:
https://github.com/MrVan/linux/tree/linux-next-master-628-blk-ctl-test

Only have blk-ctl,gpc,pd update. Please help test with applying your
local patches with some peripherals enabled.

I tested the upper code with suspend/resume with uart wakeup,
it not hang anymore.

Thanks,
Peng.