linux-kernel - Re: [PATCH v3 0/2] Digiteq Automotive MGB4 driver

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Date:   Fri, 4 Nov 2022 11:45:10 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     tumic@...see.org, Mauro Carvalho Chehab <mchehab@...nel.org>,
        Michal Simek <michal.simek@...inx.com>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, Lizhi Hou <lizhi.hou@....com>,
        Martin Tůma <martin.tuma@...iteqautomotive.com>
Subject: Re: [PATCH v3 0/2] Digiteq Automotive MGB4 driver

On 18/10/2022 16:03, tumic@...see.org wrote:
> From: Martin Tůma <martin.tuma@...iteqautomotive.com>
> 
> Hi,
> This series of patches adds a driver for the Digiteq Automotive MGB4 grabber
> card. MGB4 is a modular frame grabber PCIe card for automotive video interfaces
> (FPD-Link and GMSL for now). It is based on a Xilinx FPGA and uses their
> XDMA IP core for DMA transfers. Additionally, Xilinx I2C and SPI IP cores
> which already have drivers in linux are used in the design.
> 
> The driver is a quite standard v4l2 driver, with one exception - there are
> a lot of sysfs options that may/must be set before opening the v4l2 device
> to adapt the card on a specific signal (see mgb4.rst for details)
> as the card must be able to work with various signal sources (or displays)
> that can not be auto-detected.
> 
> I have run the driver through the v4l2-compliance test suite for both the
> input and the output and the results look fine to me (I can provide the
> output if required).

Please do! Did you use the latest v4l2-compliance code from the v4l-utils
git repo? Distros tend to have a too-old version.

Regards,

	Hans

> 
> The patch requires the new XDMA v8 driver from Xilinx/AMD from the dmaengine
> mailing list to compile/work:
> https://www.spinics.net/lists/dmaengine/msg31476.html
> 
> 
> Changes in v3:
> * Rebased the DMA transfers part to use the new XDMA driver from Xilinx/AMD
> 
> Changes in v2:
> * Completely rewritten the original Xilinx's XDMA driver to meet kernel code
>   standards.
> * Added all required "to" and "cc" mail addresses.
> 
> Martin Tůma (2):
>   i2c: xiic: Added platform module alias for the xiic I2C driver
>   Added Digiteq Automotive MGB4 driver
> 
>  Documentation/admin-guide/media/mgb4.rst      | 342 ++++++++
>  .../admin-guide/media/pci-cardlist.rst        |   1 +
>  .../admin-guide/media/v4l-drivers.rst         |   1 +
>  MAINTAINERS                                   |   7 +
>  drivers/i2c/busses/i2c-xiic.c                 |   1 +
>  drivers/media/pci/Kconfig                     |   1 +
>  drivers/media/pci/Makefile                    |   1 +
>  drivers/media/pci/mgb4/Kconfig                |  17 +
>  drivers/media/pci/mgb4/Makefile               |   6 +
>  drivers/media/pci/mgb4/mgb4_cmt.c             | 243 ++++++
>  drivers/media/pci/mgb4/mgb4_cmt.h             |  16 +
>  drivers/media/pci/mgb4/mgb4_core.c            | 628 +++++++++++++++
>  drivers/media/pci/mgb4/mgb4_core.h            |  65 ++
>  drivers/media/pci/mgb4/mgb4_dma.c             | 120 +++
>  drivers/media/pci/mgb4/mgb4_dma.h             |  18 +
>  drivers/media/pci/mgb4/mgb4_i2c.c             | 139 ++++
>  drivers/media/pci/mgb4/mgb4_i2c.h             |  35 +
>  drivers/media/pci/mgb4/mgb4_io.h              |  36 +
>  drivers/media/pci/mgb4/mgb4_regs.c            |  30 +
>  drivers/media/pci/mgb4/mgb4_regs.h            |  35 +
>  drivers/media/pci/mgb4/mgb4_sysfs.h           |  18 +
>  drivers/media/pci/mgb4/mgb4_sysfs_in.c        | 750 ++++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_sysfs_out.c       | 734 +++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_sysfs_pci.c       |  83 ++
>  drivers/media/pci/mgb4/mgb4_trigger.c         | 203 +++++
>  drivers/media/pci/mgb4/mgb4_trigger.h         |   8 +
>  drivers/media/pci/mgb4/mgb4_vin.c             | 665 ++++++++++++++++
>  drivers/media/pci/mgb4/mgb4_vin.h             |  64 ++
>  drivers/media/pci/mgb4/mgb4_vout.c            | 507 ++++++++++++
>  drivers/media/pci/mgb4/mgb4_vout.h            |  58 ++
>  30 files changed, 4832 insertions(+)
>  create mode 100644 Documentation/admin-guide/media/mgb4.rst
>  create mode 100644 drivers/media/pci/mgb4/Kconfig
>  create mode 100644 drivers/media/pci/mgb4/Makefile
>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>  create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
>