[RFC PATCH V7 0/3] media: support Mediatek sensor interface driver

[Louis Kuo]

Hello,

This is the RFC patch adding Sensor Inferface(seninf) driver on Mediatek mt8183 SoC, which will be used
in camera features on CrOS application.
It belongs to the first Mediatek's camera driver series based on V4L2 and media controller framework.
I posted the main part of the seninf driver as RFC to discuss first and would like some review comments
on the overall structure of the driver.

The driver is implemented with V4L2 framework.
1. Register as a V4L2 sub-device.
2. Only one entity with sink pads linked to camera sensors for choosing desired camera sensor by setup link
   and with source pads linked to cam-io for routing different types of decoded packet datas to PASS1 driver
   to generate sensor image frame and meta-data.

The overall file structure of the seninf driver is as following:

* mtk_seninf.c: Implement software and HW control flow of seninf driver.
* mtk_seninf_dphy.c: Implement mipi-rx phy-device of seninf driver.
* mtk_seninf_reg.h: Define HW register R/W macros and HW register names.
* mtk_seninf_rx_reg.h: Define HW RX register R/W macros and HW register names.

[ V7: Use phy device to control mipi dphy rx, Shrink register definition]

  media: platform: mtk-isp: Add Mediatek sensor interface driver
  dt-bindings: mt8183: Add sensor interface dt-bindings
  dts: arm64: mt8183: Add sensor interface nodes

 .../bindings/media/mediatek-seninf.yaml       |  223 +++
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      |   26 +
 drivers/media/platform/Makefile               |    1 +
 drivers/media/platform/mtk-isp/Kconfig        |   18 +
 drivers/media/platform/mtk-isp/Makefile       |    3 +
 .../media/platform/mtk-isp/seninf/Makefile    |    7 +
 .../platform/mtk-isp/seninf/mtk_seninf.c      |  974 +++++++++++
 .../platform/mtk-isp/seninf/mtk_seninf_dphy.c |  353 ++++
 .../platform/mtk-isp/seninf/mtk_seninf_reg.h  | 1491 +++++++++++++++++
 .../mtk-isp/seninf/mtk_seninf_rx_reg.h        |  515 ++++++
 10 files changed, 3611 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/mediatek-seninf.yaml
 create mode 100644 drivers/media/platform/mtk-isp/Kconfig
 create mode 100644 drivers/media/platform/mtk-isp/Makefile
 create mode 100644 drivers/media/platform/mtk-isp/seninf/Makefile
 create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf.c
 create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf_dphy.c
 create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf_reg.h
 create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf_rx_reg.h