linux-kernel - Re: [PATCH 0/5] media: Allwinner A10 CSI support

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Date:   Tue, 13 Nov 2018 13:30:49 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        linux-media@...r.kernel.org, Andrzej Hajda <a.hajda@...sung.com>,
        Chen-Yu Tsai <wens@...e.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Subject: Re: [PATCH 0/5] media: Allwinner A10 CSI support

On 11/13/18 09:24, Maxime Ripard wrote:
> Hi,
> 
> Here is a series introducing the support for the A10 (and SoCs of the same
> generation) CMOS Sensor Interface (called CSI, not to be confused with
> MIPI-CSI, which isn't support by that IP).
> 
> That interface is pretty straightforward, but the driver has a few issues
> that I wanted to bring up:
> 
>   * The only board I've been testing this with has an ov5640 sensor
>     attached, which doesn't work with the upstream driver. Copying the
>     Allwinner init sequence works though, and this is how it has been
>     tested. Testing with a second sensor would allow to see if it's an
>     issue on the CSI side or the sensor side.
>   * When starting a capture, the last buffer to capture will fail due to
>     double buffering being used, and we don't have a next buffer for the
>     last frame. I'm not sure how to deal with that though. It seems like
>     some drivers use a scratch buffer in such a case, some don't care, so
>     I'm not sure which solution should be preferred.
>   * We don't have support for the ISP at the moment, but this can be added
>     eventually.
> 
>   * How to model the CSI module clock isn't really clear to me. It looks
>     like it goes through the CSI controller and then is muxed to one of the
>     CSI pin so that it can clock the sensor. I'm not quite sure how to
>     model it, if it should be a clock, the CSI driver being a clock
>     provider, or if the sensor should just use the module clock directly.
> 
> Here is the v4l2-compliance output:

Test v4l2-compliance with the -s option so you test streaming as well.
Even better is -f where it tests streaming with all available formats.

> v4l2-compliance SHA   : 339d550e92ac15de8668f32d66d16f198137006c

Hmm, I can't find this SHA. Was this built from the main v4l-utils repo?

Regards,

	Hans

> 
> Driver Info:
> 	Driver name   : sun4i_csi
> 	Card type     : sun4i-csi
> 	Bus info      : platform:1c09000.csi
> 	Driver version: 4.19.0
> 	Capabilities  : 0x84201000
> 		Video Capture Multiplanar
> 		Streaming
> 		Extended Pix Format
> 		Device Capabilities
> 	Device Caps   : 0x04201000
> 		Video Capture Multiplanar
> 		Streaming
> 		Extended Pix Format
> 
> Compliance test for device /dev/video0 (not using libv4l2):
> 
> Required ioctls:
> 	test VIDIOC_QUERYCAP: OK
> 
> Allow for multiple opens:
> 	test second video open: OK
> 	test VIDIOC_QUERYCAP: OK
> 	test VIDIOC_G/S_PRIORITY: OK
> 	test for unlimited opens: OK
> 
> Debug ioctls:
> 	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
> 	test VIDIOC_LOG_STATUS: OK (Not Supported)
> 
> Input ioctls:
> 	test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
> 	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> 	test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
> 	test VIDIOC_ENUMAUDIO: OK (Not Supported)
> 	test VIDIOC_G/S/ENUMINPUT: OK
> 	test VIDIOC_G/S_AUDIO: OK (Not Supported)
> 	Inputs: 1 Audio Inputs: 0 Tuners: 0
> 
> Output ioctls:
> 	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
> 	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> 	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
> 	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
> 	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
> 	Outputs: 0 Audio Outputs: 0 Modulators: 0
> 
> Input/Output configuration ioctls:
> 	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
> 	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
> 	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
> 	test VIDIOC_G/S_EDID: OK (Not Supported)
> 
> Test input 0:
> 
> 	Control ioctls:
> 		test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK (Not Supported)
> 		test VIDIOC_QUERYCTRL: OK (Not Supported)
> 		test VIDIOC_G/S_CTRL: OK (Not Supported)
> 		test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported)
> 		test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not Supported)
> 		test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
> 		Standard Controls: 0 Private Controls: 0
> 
> 	Format ioctls:
> 		test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
> 		test VIDIOC_G/S_PARM: OK (Not Supported)
> 		test VIDIOC_G_FBUF: OK (Not Supported)
> 		test VIDIOC_G_FMT: OK
> 		test VIDIOC_TRY_FMT: OK
> 		test VIDIOC_S_FMT: OK
> 		test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
> 		test Cropping: OK (Not Supported)
> 		test Composing: OK (Not Supported)
> 		test Scaling: OK
> 
> 	Codec ioctls:
> 		test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
> 		test VIDIOC_G_ENC_INDEX: OK (Not Supported)
> 		test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
> 
> 	Buffer ioctls:
> 		test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
> 		test VIDIOC_EXPBUF: OK
> 
> Test input 0:
> 
> Total: 43, Succeeded: 43, Failed: 0, Warnings: 0
> 
> Let me know what you think,
> Maxime
> 
> Maxime Ripard (5):
>   dt-bindings: media: Add Allwinner A10 CSI binding
>   media: sunxi: Refactor the Makefile and Kconfig
>   media: sunxi: Add A10 CSI driver
>   ARM: dts: sun7i: Add CSI0 controller
>   DO NOT MERGE: ARM: dts: bananapi: Add Camera support
> 
>  Documentation/devicetree/bindings/media/sun4i-csi.txt |  71 ++-
>  arch/arm/boot/dts/sun7i-a20-bananapi.dts              |  98 +++-
>  arch/arm/boot/dts/sun7i-a20.dtsi                      |  13 +-
>  drivers/media/platform/Kconfig                        |   2 +-
>  drivers/media/platform/Makefile                       |   2 +-
>  drivers/media/platform/sunxi/Kconfig                  |   2 +-
>  drivers/media/platform/sunxi/Makefile                 |   2 +-
>  drivers/media/platform/sunxi/sun4i-csi/Kconfig        |  12 +-
>  drivers/media/platform/sunxi/sun4i-csi/Makefile       |   5 +-
>  drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c    | 275 ++++++++-
>  drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.h    | 137 ++++-
>  drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c    | 383 +++++++++++-
>  drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c   | 287 ++++++++-
>  13 files changed, 1287 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/media/sun4i-csi.txt
>  create mode 100644 drivers/media/platform/sunxi/Kconfig
>  create mode 100644 drivers/media/platform/sunxi/Makefile
>  create mode 100644 drivers/media/platform/sunxi/sun4i-csi/Kconfig
>  create mode 100644 drivers/media/platform/sunxi/sun4i-csi/Makefile
>  create mode 100644 drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c
>  create mode 100644 drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.h
>  create mode 100644 drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c
>  create mode 100644 drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c
> 
> base-commit: 94517eaa3d43005472864615dfd17f1ef6ca3935
>