linux-kernel - Re: [PATCH v4 0/6] media/sun6i: Allwinner A64 CSI support

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Date:   Wed, 19 Dec 2018 16:11:50 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-media <linux-media@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        linux-amarula@...rulasolutions.com,
        Michael Trimarchi <michael@...rulasolutions.com>
Subject: Re: [PATCH v4 0/6] media/sun6i: Allwinner A64 CSI support

On Wed, Dec 19, 2018 at 3:55 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
>
> On Tue, Dec 18, 2018 at 08:58:22PM +0530, Jagan Teki wrote:
> > On Tue, Dec 18, 2018 at 8:51 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
> > >
> > > On Tue, Dec 18, 2018 at 05:03:14PM +0530, Jagan Teki wrote:
> > > > This series support CSI on Allwinner A64.
> > > >
> > > > Tested 640x480, 320x240, 720p, 1080p resolutions UYVY8_2X8 format.
> > > >
> > > > Changes for v4:
> > > > - update the compatible string order
> > > > - add proper commit message
> > > > - included BPI-M64 patch
> > > > - skipped amarula-a64 patch
> > > > Changes for v3:
> > > > - update dt-bindings for A64
> > > > - set mod clock via csi driver
> > > > - remove assign clocks from dtsi
> > > > - remove i2c-gpio opendrian
> > > > - fix avdd and dovdd supplies
> > > > - remove vcc-csi pin group supply
> > > >
> > > > Note: This series created on top of H3 changes [1]
> > > >
> > > > [1] https://patchwork.kernel.org/cover/10705905/
> > >
> > > You had memory corruption before, how was this fixed?
> >
> > Memory corruption observed with default 600MHz on 1080p. It worked
> > fine on BPI-M64 (with 300MHz)
>
> I don't get it. In the previous version of those patches, you were
> mentionning you were still having this issue, even though you had the
> clock running at 300MHz, and then you tried to convince us to merge
> the patches nonetheless.
>
> Why would you say that then if that issue was fixed?

Previous version has A64-Relic board, which has some xclk issue on
sensor side wrt 1080p. I have tried 300MHz on the same hardware, it's
failing to capture on 30fps and so I tried 600MHz(which is default) on
the same configuration but it encounter memory corruption.

So, for checking whether there is an issue with hardware on A64-Relic
I moved with BPI-M64 dev board. which is working 1080p with 300MHz, ie
reason I have not included A64-Relic on this version and included
BPI-M64. We processed A64-Relic to hardware team to figure out the
clock and once ie fixed I'm planning to send DTS patch for that.

This is overall summary, hope you understand.