[v7,0/2] Digiteq Automotive MGB4 driver

From: Martin Tůma <martin.tuma@digiteqautomotive.com>

Hi,
This patch 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.

Changes in v7:
* Now using hwmon for FPGA temperature reporting.
* Now using VIDIOC_S_FMT and v4l2_pix_format.bytesperline for setting
  the alignment.
* Removed the magic sleep when loading the i2c/spi adapter modules (solved by
  request_module() calls with propper - "platform:" prefixed - module
  names).
* Now properly reporting all the timings info in the VIDIOC_G_DV_TIMINGS
  ioctls.
* Updated the documentation.
* Minor fixes as discussed in the v6 review.
* Added debugfs access to the FPGA registers.

Changes in v6:
* Rebased to current master that includes the Xilinx XDMA driver.

Changes in v5:
* Removed unused <linux/version.h> includes

Changes in v4:
* Redesigned the signal change handling logic. Now using the propper timings
  API in the video input driver and a propper open() syscall check/logic in
  the video output driver.
* Fixed all minor issues from v3 review.
* 'checkpatch.pl --strict' used for checking the code.

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.


===== v4l2-compliance results - input =====

v4l2-compliance 1.24.1, 64 bits, 64-bit time_t

Compliance test for mgb4 device /dev/video0:

Driver Info:
        Driver name      : mgb4
        Card type        : MGB4 PCIe Card
        Bus info         : PCI:0000:01:00.0
        Driver version   : 6.4.0
        Capabilities     : 0x85200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format
                Device Capabilities
        Device Caps      : 0x05200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format

Required ioctls:
        test VIDIOC_QUERYCAP: OK
        test invalid ioctls: OK

Allow for multiple opens:
        test second /dev/video0 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
        test VIDIOC_DV_TIMINGS_CAP: OK
        test VIDIOC_G/S_EDID: OK (Not Supported)

Control ioctls (Input 0):
        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)
                warn: v4l2-test-controls.cpp(1139): V4L2_CID_DV_RX_POWER_PRESENT not found for input 0
        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 (Input 0):
        test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
        test VIDIOC_G/S_PARM: OK
        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 (Not Supported)

Codec ioctls (Input 0):
        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 (Input 0):
        test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
        test VIDIOC_EXPBUF: OK
        test Requests: OK (Not Supported)

Total for mgb4 device /dev/video0: 45, Succeeded: 45, Failed: 0, Warnings: 1

===== v4l2-compliance results - output =====

v4l2-compliance 1.24.1, 64 bits, 64-bit time_t

Compliance test for mgb4 device /dev/video2:

Driver Info:
        Driver name      : mgb4
        Card type        : MGB4 PCIe Card
        Bus info         : PCI:0000:01:00.0
        Driver version   : 6.4.0
        Capabilities     : 0x85200002
                Video Output
                Read/Write
                Streaming
                Extended Pix Format
                Device Capabilities
        Device Caps      : 0x05200002
                Video Output
                Read/Write
                Streaming
                Extended Pix Format

Required ioctls:
        test VIDIOC_QUERYCAP: OK
        test invalid ioctls: OK

Allow for multiple opens:
        test second /dev/video2 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 (Not Supported)
        test VIDIOC_G/S_AUDIO: OK (Not Supported)
        Inputs: 0 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
        test VIDIOC_G/S_AUDOUT: OK (Not Supported)
        Outputs: 1 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)

Control ioctls (Output 0):
        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 (Output 0):
        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 (Not Supported)

Codec ioctls (Output 0):
        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 (Output 0):
        test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
        test VIDIOC_EXPBUF: OK
        test Requests: OK (Not Supported)

Total for mgb4 device /dev/video2: 45, Succeeded: 45, Failed: 0, Warnings: 0


Martin Tůma (2):
  Added Digiteq Automotive MGB4 driver
  Added Digiteq Automotive MGB4 driver documentation

 Documentation/admin-guide/media/mgb4.rst      | 369 +++++++
 .../admin-guide/media/pci-cardlist.rst        |   1 +
 .../admin-guide/media/v4l-drivers.rst         |   1 +
 MAINTAINERS                                   |   7 +
 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             | 244 +++++
 drivers/media/pci/mgb4/mgb4_cmt.h             |  17 +
 drivers/media/pci/mgb4/mgb4_core.c            | 705 +++++++++++++
 drivers/media/pci/mgb4/mgb4_core.h            |  70 ++
 drivers/media/pci/mgb4/mgb4_dma.c             | 123 +++
 drivers/media/pci/mgb4/mgb4_dma.h             |  18 +
 drivers/media/pci/mgb4/mgb4_i2c.c             | 140 +++
 drivers/media/pci/mgb4/mgb4_i2c.h             |  35 +
 drivers/media/pci/mgb4/mgb4_io.h              |  33 +
 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        | 757 ++++++++++++++
 drivers/media/pci/mgb4/mgb4_sysfs_out.c       | 700 +++++++++++++
 drivers/media/pci/mgb4/mgb4_sysfs_pci.c       |  71 ++
 drivers/media/pci/mgb4/mgb4_trigger.c         | 208 ++++
 drivers/media/pci/mgb4/mgb4_trigger.h         |   8 +
 drivers/media/pci/mgb4/mgb4_vin.c             | 930 ++++++++++++++++++
 drivers/media/pci/mgb4/mgb4_vin.h             |  69 ++
 drivers/media/pci/mgb4/mgb4_vout.c            | 594 +++++++++++
 drivers/media/pci/mgb4/mgb4_vout.h            |  65 ++
 29 files changed, 5273 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


base-commit: 933174ae28ba72ab8de5b35cb7c98fc211235096