[PATCH 0/4] media: raspberrypi: Support RPi5's CFE

[Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>]

This series adds support to the CFE hardware block on RaspberryPi 5. The
CFE (Camera Front End) contains a CSI-2 receiver and Front End, a small
ISP.

This series is currently based on multiple other serieses:

- Sakari's "[PATCH v8 00/38] Generic line based metadata support, internal
  pads" for metadata support
- Laurent's "[PATCH 00/15] media: Add driver for the Raspberry Pi <5
  CSI-2 receiver" for a few new pixel formats and imx219 (for testing).
- Jacopo's "[PATCH v5 0/9] media: raspberrypi: Add support for PiSP Back
  End" for some shared uapi headers.

And to run this, one of course needs the basic RPi5 kernel support plus
relevant dts changes to enable the cfe and camera.

So at the moment we cannot merge this driver, but hopefully the
dependencies will get merged before the reviews on this one are done.

A few notes about the patches:

- The original work was done by RaspberryPi, mostly by Naushir Patuck.
- The second video node only sets V4L2_CAP_META_CAPTURE instead of both
  V4L2_CAP_META_CAPTURE and V4L2_CAP_META_CAPTURE like the other nodes.
  This is a temporary workaround for userspace (libcamera), and
  hopefully can be removed soon.
- The compatible string is set to "raspberrypi,rpi5-rp1-cfe". I added
  the "rpi5" part as versioning, as there's no clear CFE hardware
  version defined. I'm open to other suggestions on the versioning
  scheme.

I have tested this with:
- A single IMX219 sensor connected to the RPi5's CSI-2 port
- Arducam's UB960 FPD-Link board with four imx219 sensors connected

I have pushed my branch, with all the dependencies and everything needed
to run this, to:

git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux.git rp1-cfe

 Tomi

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
Tomi Valkeinen (4):
      media: uapi: Add meta formats for PiSP FE config and stats
      dt-bindings: media: Add bindings for raspberrypi,rp1-cfe
      media: raspberrypi: Add support for RP1-CFE
      media: admin-guide: Document the Raspberry Pi CFE (rp1-cfe)

 .../admin-guide/media/raspberrypi-rp1-cfe.dot      |   27 +
 .../admin-guide/media/raspberrypi-rp1-cfe.rst      |   78 +
 Documentation/admin-guide/media/v4l-drivers.rst    |    1 +
 .../bindings/media/raspberrypi,rp1-cfe.yaml        |  103 +
 .../userspace-api/media/v4l/meta-formats.rst       |    1 +
 .../userspace-api/media/v4l/metafmt-pisp-fe.rst    |   39 +
 MAINTAINERS                                        |    8 +
 drivers/media/platform/raspberrypi/Kconfig         |    1 +
 drivers/media/platform/raspberrypi/Makefile        |    1 +
 drivers/media/platform/raspberrypi/rp1-cfe/Kconfig |   14 +
 .../media/platform/raspberrypi/rp1-cfe/Makefile    |    6 +
 .../media/platform/raspberrypi/rp1-cfe/cfe-fmts.h  |  330 +++
 .../media/platform/raspberrypi/rp1-cfe/cfe-trace.h |  196 ++
 drivers/media/platform/raspberrypi/rp1-cfe/cfe.c   | 2526 ++++++++++++++++++++
 drivers/media/platform/raspberrypi/rp1-cfe/cfe.h   |   43 +
 drivers/media/platform/raspberrypi/rp1-cfe/csi2.c  |  579 +++++
 drivers/media/platform/raspberrypi/rp1-cfe/csi2.h  |   89 +
 drivers/media/platform/raspberrypi/rp1-cfe/dphy.c  |  175 ++
 drivers/media/platform/raspberrypi/rp1-cfe/dphy.h  |   27 +
 .../media/platform/raspberrypi/rp1-cfe/pisp-fe.c   |  581 +++++
 .../media/platform/raspberrypi/rp1-cfe/pisp-fe.h   |   53 +
 drivers/media/v4l2-core/v4l2-ioctl.c               |    2 +
 .../uapi/linux/media/raspberrypi/pisp_fe_config.h  |  273 +++
 .../linux/media/raspberrypi/pisp_fe_statistics.h   |   64 +
 include/uapi/linux/videodev2.h                     |    2 +
 25 files changed, 5219 insertions(+)
---
base-commit: d87156e95652bc6463f86b25149f75cc3b8742eb
change-id: 20240314-rp1-cfe-142b628b7214

Best regards,
-- 
Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>