[PATCH v2 0/4] Add driver for CSI2 and CRU modules found on Renesas RZ/G2L SoC

[Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>]

Hi All,

This patch series aims to add driver support to CRU module found
on Renesas RZ/G2L SoC.

The Camera Data Receiving Unit (CRU) consists of a MIPI CSI-2
block and an Image Processing block. The Image Processing block
can receive video data received from the external Digital Parallel
Interface or MIPI CSI-2 block, and perform appropriate image
processing for each.

More details:
* https://renesas.info/wiki/File:CRU.png
* https://www.renesas.com/document/mah/rzg2l-group-rzg2lc-group-users-manual-hardware-0?language=en&r=1467981

Currently the driver has been tested using yavta and Gstreamer
on RZ/G2L SMARC EVK using the ov5645 sensor on CSI2 interface
only.

v1 -> v2:
* Dropped media prefix from subject
* Renamed node name csi20 -> csi
* Used 4 spaces for indentation in example node
* Dropped reset-names and interrupt-names properties
* Dropped oneOf from compatible
* Included RB tags from Laurent
* Marked port0/1 as required for cru node
* Sorted Kconfig select
* Prefixed generic names for struct/variables with rzg2_csi2
* Dropped unnecessary checks for remote source
* Dropped exporting functions
* Moved lane validation to probe
* Split up rzg2l_csi2_dphy_setting() and rzg2l_csi2_mipi_link_setting()
* Used rzg2l_csi2_write() wherever possible
* Dropped stream_count/lock members from csi2 struct
* Used active subdev state instead of manually storing format in driver
* Implemented init_cfg/enum_frame_size/enum_mbus_code callbacks
* Dropped check for bus_type of remote source
* Switched to manually turning ON/OFF the clocks instead of pm_runtime so that
  the mipi/dhpy initialization happens as per the HW manual
* Hardcoded VC0 usage for now as streams API is under development

v1:
- https://patchwork.kernel.org/project/linux-renesas-soc/cover/20220801214718.16943-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

RFC v2:
- https://patchwork.kernel.org/project/linux-renesas-soc/cover/20220121010543.31385-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

RFC v1:
- https://patchwork.kernel.org/project/linux-renesas-soc/cover/20211207012351.15754-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

Cheers,
Prabhakar


Lad Prabhakar (4):
  media: dt-bindings: Document Renesas RZ/G2L CSI-2 block
  media: dt-bindings: Document Renesas RZ/G2L CRU block
  media: platform: Add Renesas RZ/G2L MIPI CSI-2 receiver driver
  media: platform: Add Renesas RZ/G2L CRU driver

 .../bindings/media/renesas,rzg2l-cru.yaml     | 157 ++++
 .../bindings/media/renesas,rzg2l-csi2.yaml    | 140 ++++
 drivers/media/platform/renesas/Kconfig        |   1 +
 drivers/media/platform/renesas/Makefile       |   1 +
 .../media/platform/renesas/rzg2l-cru/Kconfig  |  34 +
 .../media/platform/renesas/rzg2l-cru/Makefile |   6 +
 .../platform/renesas/rzg2l-cru/rzg2l-core.c   | 395 +++++++++
 .../platform/renesas/rzg2l-cru/rzg2l-cru.h    | 152 ++++
 .../platform/renesas/rzg2l-cru/rzg2l-csi2.c   | 761 ++++++++++++++++++
 .../platform/renesas/rzg2l-cru/rzg2l-csi2.h   |  46 ++
 .../platform/renesas/rzg2l-cru/rzg2l-dma.c    | 734 +++++++++++++++++
 .../platform/renesas/rzg2l-cru/rzg2l-v4l2.c   | 368 +++++++++
 12 files changed, 2795 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/renesas,rzg2l-cru.yaml
 create mode 100644 Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/Kconfig
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/Makefile
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.h
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-dma.c
 create mode 100644 drivers/media/platform/renesas/rzg2l-cru/rzg2l-v4l2.c

-- 
2.25.1