[PATCH v2 0/2] media: pci: add AVMatrix HWS capture driver

[Ben Hoff <hoff.benjamin.k@gmail.com>]

Add an AVMatrix HWS PCIe capture driver and its MAINTAINERS entry.

The driver exposes one V4L2 capture node per input channel, supports
YUYV capture through vb2-dma-contig, reports DV timings, emits
SOURCE_CHANGE events, and provides the basic brightness/contrast/
saturation/hue controls used by the hardware.

Changes in v2:
- keep scratch DMA allocation on a single probe-owned path
- fix hws_video_register()/probe unwind ownership to avoid control-handler
  double-free on late registration failures
- on live input resolution changes, emit SOURCE_CHANGE, error queued
  buffers, and require userspace to renegotiate buffers and restart
  streaming
- add enum_frameintervals and report DV_RX_POWER_PRESENT, addressing the
  two v1 v4l2-compliance warnings

Testing for v2:
- build-tested with W=1:
  make -C /home/hoff/swdev/linux O=/tmp/hws-build \
    M=drivers/media/pci/hws W=1 KBUILD_MODPOST_WARN=1 modules
- checkpatch.pl --no-tree --strict --file ... is clean for the new files

Context carried forward from v1:
- audio support remains intentionally omitted from this submission
- the driver is derived from a GPL out-of-tree driver; the baseline tree is
  available at https://github.com/benhoff/hws/tree/baseline
- a vendor driver bundle is available at
  https://www.acasis.com/pages/acasis-product-drivers
- the vendor is not involved in this upstreaming effort

Ben Hoff (2):
  media: pci: add AVMatrix HWS capture driver
  MAINTAINERS: add entry for AVMatrix HWS driver

 MAINTAINERS                            |    6 +
 drivers/media/pci/Kconfig              |    1 +
 drivers/media/pci/Makefile             |    1 +
 drivers/media/pci/hws/Kconfig          |   12 +
 drivers/media/pci/hws/Makefile         |    4 +
 drivers/media/pci/hws/hws.h            |  176 +++
 drivers/media/pci/hws/hws_irq.c        |  271 +++++
 drivers/media/pci/hws/hws_irq.h        |   10 +
 drivers/media/pci/hws/hws_pci.c        |  864 +++++++++++++
 drivers/media/pci/hws/hws_reg.h        |  144 +++
 drivers/media/pci/hws/hws_v4l2_ioctl.c |  778 ++++++++++++
 drivers/media/pci/hws/hws_v4l2_ioctl.h |   43 +
 drivers/media/pci/hws/hws_video.c      | 1546 ++++++++++++++++++++++++
 drivers/media/pci/hws/hws_video.h      |   29 +
 14 files changed, 3885 insertions(+)
 create mode 100644 drivers/media/pci/hws/Kconfig
 create mode 100644 drivers/media/pci/hws/Makefile
 create mode 100644 drivers/media/pci/hws/hws.h
 create mode 100644 drivers/media/pci/hws/hws_irq.c
 create mode 100644 drivers/media/pci/hws/hws_irq.h
 create mode 100644 drivers/media/pci/hws/hws_pci.c
 create mode 100644 drivers/media/pci/hws/hws_reg.h
 create mode 100644 drivers/media/pci/hws/hws_v4l2_ioctl.c
 create mode 100644 drivers/media/pci/hws/hws_v4l2_ioctl.h
 create mode 100644 drivers/media/pci/hws/hws_video.c
 create mode 100644 drivers/media/pci/hws/hws_video.h


base-commit: f0caa1d49cc07b30a7e2f104d3853ec6dc1c3cad
-- 
2.53.0