From: Yong <yong.deng@magewell.com>
To: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, Chen-Yu Tsai <wens@csie.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"David S. Miller" <davem@davemloft.net>,
Hans Verkuil <hverkuil@xs4all.nl>, Arnd Bergmann <arnd@arndb.de>,
Hugues Fruchet <hugues.fruchet@st.com>,
Yannick Fertre <yannick.fertre@st.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Benoit Parrot <bparrot@ti.com>,
Benjamin Gaignard <benjamin.gaignard@linaro.org>,
Jean-Christophe Trotin <jean-christophe.trotin@st.com>,
Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>,
Minghsiu Tsai <minghsiu.tsai@mediatek.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
Robert Jarzmik <robert.jarzmik@free.fr>,
linux-media@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com
Subject: Re: [PATCH v2 1/3] media: V3s: Add support for Allwinner CSI.
Date: Mon, 4 Dec 2017 17:45:11 +0800 [thread overview]
Message-ID: <20171204174511.a5be3b521e9a7c7004d32d0d@magewell.com> (raw)
In-Reply-To: <20171125160233.skefdpkjy4peh7et@flea.lan>
Hi Maxime,
I just noticed that you are using the second iteration?
Have you received my third iteration?
On Sat, 25 Nov 2017 17:02:33 +0100
Maxime Ripard <maxime.ripard@free-electrons.com> wrote:
> On Thu, Nov 23, 2017 at 09:14:44AM +0800, Yong wrote:
> > > On Wed, Nov 22, 2017 at 09:33:06AM +0800, Yong wrote:
> > > > > On Thu, Jul 27, 2017 at 01:01:35PM +0800, Yong Deng wrote:
> > > > > > Allwinner V3s SoC have two CSI module. CSI0 is used for MIPI interface
> > > > > > and CSI1 is used for parallel interface. This is not documented in
> > > > > > datasheet but by testing and guess.
> > > > > >
> > > > > > This patch implement a v4l2 framework driver for it.
> > > > > >
> > > > > > Currently, the driver only support the parallel interface. MIPI-CSI2,
> > > > > > ISP's support are not included in this patch.
> > > > > >
> > > > > > Signed-off-by: Yong Deng <yong.deng@magewell.com>
> > > > >
> > > > > Thanks again for this driver.
> > > > >
> > > > > It seems like at least this iteration is behaving in a weird way with
> > > > > DMA transfers for at least YU12 and NV12 (and I would assume YV12).
> > > > >
> > > > > Starting a transfer of multiple frames in either of these formats,
> > > > > using either ffmpeg (ffmpeg -f v4l2 -video_size 640x480 -framerate 30
> > > > > -i /dev/video0 output.mkv) or yavta (yavta -c80 -p -F --skip 0 -f NV12
> > > > > -s 640x480 $(media-c tl -e 'sun6i-csi')) will end up in a panic.
> > > > >
> > > > > The panic seems to be generated with random data going into parts of
> > > > > the kernel memory, the pattern being in my case something like
> > > > > 0x8287868a which is very odd (always around 0x88)
> > > > >
> > > > > It turns out that when you cover the sensor, the values change to
> > > > > around 0x28, so it really seems like it's pixels that have been copied
> > > > > there.
> > > > >
> > > > > I've looked quickly at the DMA setup, and it seems reasonable to
> > > > > me. Do you have the same issue on your side? Have you been able to
> > > > > test those formats using your hardware?
> > > >
> > > > I had tested the following formats with BT1120 input:
> > > > V4L2_PIX_FMT_NV12 -> NV12
> > > > V4L2_PIX_FMT_NV21 -> NV21
> > > > V4L2_PIX_FMT_NV16 -> NV16
> > > > V4L2_PIX_FMT_NV61 -> NV61
> > > > V4L2_PIX_FMT_YUV420 -> YU12
> > > > V4L2_PIX_FMT_YVU420 -> YV12
> > > > V4L2_PIX_FMT_YUV422P -> 422P
> > > > And they all work fine.
> > >
> > > Ok, that's good to know.
> > >
> > > > > Given that they all are planar formats and YUYV and the likes work
> > > > > just fine, maybe we can leave them aside for now?
> > > >
> > > > V4L2_PIX_FMT_YUV422P and V4L2_PIX_FMT_YUYV is OK, and V4L2_PIX_FMT_NV12
> > > > is bad? It's really weird.
> > > >
> > > > What's your input bus code format, type and width?
> > >
> > > The sensor is an ov5640, so the MBUS code for the bus is
> > > MEDIA_BUS_FMT_YUYV8_2X8.
> >
> > Did you test on V3s?
>
> No, this is on an H3, but that would be the first difference so far.
>
> > I haven't tested it with MEDIA_BUS_FMT_YUYV8_2X8.
>
> Ok, it's good to know that at least it works on your end, it's useful
> for us to debug things :)
>
> > The Allwinner CSI's DMA is definitely weird. Ondřej Jirman thought
> > that CSI has an internal queue (Ondřej's commit has explained in detail).
> > I think CSI just pick up the buffer address before the frame done
> > interrupt triggered.
> > The patch in attachment can deal with this. You can see if it is
> > useful to solve your problem.
>
> I'll test that on monday, thanks!
>
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com
Thanks,
Yong
next prev parent reply other threads:[~2017-12-04 9:45 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-27 5:01 [PATCH v2 0/3] Initial Allwinner V3s CSI Support Yong Deng
2017-07-27 5:01 ` [PATCH v2 1/3] media: V3s: Add support for Allwinner CSI Yong Deng
2017-07-27 12:16 ` Baruch Siach
2017-07-27 12:25 ` Maxime Ripard
2017-07-31 0:47 ` Yong
2017-07-28 16:02 ` Maxime Ripard
2017-07-30 6:08 ` Baruch Siach
2017-07-31 1:48 ` Yong
2017-07-31 5:13 ` Baruch Siach
2017-08-21 20:21 ` Maxime Ripard
2017-08-23 2:41 ` Yong
2017-08-23 19:24 ` Maxime Ripard
2017-08-24 1:43 ` Yong
2017-07-31 3:16 ` Yong
2017-08-22 17:43 ` Maxime Ripard
2017-08-23 2:32 ` Yong
2017-08-25 13:41 ` Maxime Ripard
2017-08-28 7:00 ` Yong
2017-08-21 14:37 ` Hans Verkuil
2017-08-22 3:01 ` Yong
2017-08-22 6:43 ` Hans Verkuil
2017-08-22 7:51 ` Yong
2017-08-22 20:17 ` Maxime Ripard
2017-08-22 20:52 ` Laurent Pinchart
2017-08-23 6:52 ` Hans Verkuil
2017-08-23 7:43 ` Laurent Pinchart
2017-08-23 11:13 ` icenowy
2017-09-21 13:45 ` [linux-sunxi] " Ondřej Jirman
2017-09-22 8:44 ` Mylene JOSSERAND
2017-09-22 9:08 ` Yong
2017-11-21 15:48 ` Maxime Ripard
2017-11-22 1:33 ` Yong
2017-11-22 9:45 ` Maxime Ripard
2017-11-23 1:14 ` Yong
2017-11-25 16:02 ` Maxime Ripard
2017-12-04 9:45 ` Yong [this message]
2017-12-15 10:50 ` Maxime Ripard
2017-12-15 11:01 ` Yong
2017-12-15 22:14 ` Maxime Ripard
2017-07-27 5:01 ` [PATCH v2 2/3] dt-bindings: media: Add Allwinner V3s Camera Sensor Interface (CSI) Yong Deng
2017-07-28 16:03 ` Maxime Ripard
2017-07-31 0:50 ` Yong
2017-08-03 19:14 ` Rob Herring
2017-08-07 1:00 ` Yong
2017-12-19 11:53 ` Sakari Ailus
2017-12-21 2:49 ` Yong
2017-12-27 21:47 ` Sakari Ailus
2017-12-28 1:04 ` Yong
2017-07-27 5:01 ` [PATCH v2 3/3] media: MAINTAINERS: add entries for Allwinner V3s CSI Yong Deng
2017-12-19 11:48 ` Sakari Ailus
2017-12-21 2:40 ` Yong
-- strict thread matches above, loose matches on Subject: below --
2017-07-27 3:51 [PATCH v2 0/3] Initial Allwinner V3s CSI Support Yong Deng
2017-07-27 3:51 ` [PATCH v2 1/3] media: V3s: Add support for Allwinner CSI Yong Deng
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