[v5,0/6] Add StarFive Camera Subsystem driver

hi,

This series is the v5 of the series, the CSI driver is moved to another separate
series.

Changes in v5:
- Rebased on v6.4-rc1.
- Added new patch.
- Modified ISP driver.

v4 link: https://lore.kernel.org/all/20230413035541.62129-1-jack.zhu@starfivetech.com/

Previous cover letter from v4:

This patch series adds support for the StarFive Camera Subsystem
found on StarFive JH7110 SoC.

The driver implements V4L2, Media controller and V4L2 subdev interfaces.
Camera sensor using V4L2 subdev interface in the kernel is supported.

The driver is tested on VisionFive V2 board with IMX219 camera sensor.
GStreamer 1.18.5 with v4l2src plugin is supported.

Changes since v3:
Patch 1:
- Modified port@0 and port@1 properties.
- Extended the port@0 example with appropriate properties.
- Added 'port@0' for 'required'
Patch 2:
- Modified spelling errors.
Patch 3:
- Merged patch 5 into the patch with an explanation for compatible in
  commit msg.
Patch 6:
- Asserted pixel_rst[i] reset in the loop after the err_disable_pixclk
  label.
- Modified Code Style for getting sys_rst and p_rst.
- Renamed clk_name to name and modified the relevant code.
Patch 9:
- Added static for stfcamss_get_mem_res function.
- Added static for isp_close function.
- Fixed implicit conversion warning for stf_vin_map_isp_pad function.
- Dropped unused variables.

  v3: https://lore.kernel.org/all/20230331121826.96973-1-jack.zhu@starfivetech.com/

Changes since v2:
- Rebased on v6.3-rc1.
Patch 1:
- Modified spelling errors.
- Added port@0.
- Modified '$ref' of port.
- Added 'ports' to 'required'.
- Dropped 'stfcamss' label in example.
- Added port@0 in example.
- Added MAINTAINERS file.
Patch 2:
- Split this patch into three new patches.
- Modified compatible property.
- Replaced clock names with the existing names.
- Modified 'bus-type' and 'clock-lanes'
- Added port@2 - port@4
- Dropped 'csi2rx' label in example.
Patch 3:
- Updated rst and dot file as three pipelines were deleted.
Patch 4:
- Split this patch into three new patches.
- Dropped .s_power() and .get_fmt().
- Dropped CSI-2 DT support.
- Dropped v4l2_device_register_subdev_nodes().
- Used assigned-clock-rates in DT to set clk value.
- Modified 'compatible' field.
Patch 5:
- Deleted three pipelines. 
- Modified 'stfcamss_clocks'/'stfcamss_resets' struct.
- Dropped stfcamss_find_sensor() function.
- Removed redundant code from stfcamss_of_parse_endpoint_node().
- Modified spelling errors.
- Rewrote stfcamss_reg_media_subdev_node() function.
- Modified stfcamss_subdev_notifier_bound().
- Modified stfcamss_probe() function.
- Dropped stfcamss_suspend() and stfcamss_resume().
- Dropped dev_info() in stfcamss_remove() function.
- Added 'stf_' prefix for enum subdev_type.
- Moved all includes to the top in stf_camss.h file.
- Dropped unused fields in stfcamss struct.
- Replaced Custom logging macros with regular macros.
- Rewrote register read and write functions.
- Used lowercase for all hex constants.
- Used macro to name registers.
- Dropped unused ioctl and stf_isp_ioctl.h file.

  v2: https://lore.kernel.org/all/20230310120553.60586-1-jack.zhu@starfivetech.com/

Changes since v1:
- Deleted starfive,jh7110-mipi-csi2.yaml.
- Converted cdns,csi2rx.txt to cdns,csi2rx.yaml and added ‘resets’
  properties.
- Added ‘cdns,csi2rx.yaml’ in ‘CADENCE MIPI-CSI2 BRIDGES’ entry.
- The following contents were modified in starfive,jh7110-camss.yaml:
  dropped quotes from ’id’ and ‘schema’; dropped ‘|’ for ‘description’;
  corrected the wrong or redundant words: ‘a ISP’, ‘PD ISP’;
  dropped ‘minItems’ for ‘reg’, ‘clocks’, ‘resets’ and ‘interrupts’;
  dropped the '_clk' and 'rst_' prefix about the 'clock-names' and
  'reset-names';
  changed ‘endpoint@1’ to ‘endpoint’; updated examples;
- Updated Subject for some patches.
- Merged patch 6, 7, 8, 9, 10, 11 into one patch.

Jack Zhu (6):
  media: dt-bindings: Add JH7110 Camera Subsystem
  media: admin-guide: Add starfive_camss.rst for Starfive Camera
    Subsystem
  media: starfive: Add basic driver
  media: starfive: Add video driver
  media: starfive: Add ISP driver
  media: starfive: Add VIN driver

 .../admin-guide/media/starfive_camss.rst      |   57 +
 .../media/starfive_camss_graph.dot            |   16 +
 .../admin-guide/media/v4l-drivers.rst         |    1 +
 .../bindings/media/starfive,jh7110-camss.yaml |  179 +++
 MAINTAINERS                                   |    9 +
 drivers/media/platform/Kconfig                |    1 +
 drivers/media/platform/Makefile               |    1 +
 drivers/media/platform/starfive/Kconfig       |   19 +
 drivers/media/platform/starfive/Makefile      |   14 +
 drivers/media/platform/starfive/stf_camss.c   |  476 +++++++
 drivers/media/platform/starfive/stf_camss.h   |  157 +++
 drivers/media/platform/starfive/stf_common.h  |   18 +
 drivers/media/platform/starfive/stf_isp.c     |  550 ++++++++
 drivers/media/platform/starfive/stf_isp.h     |  476 +++++++
 .../media/platform/starfive/stf_isp_hw_ops.c  |  452 +++++++
 drivers/media/platform/starfive/stf_video.c   |  864 +++++++++++++
 drivers/media/platform/starfive/stf_video.h   |   95 ++
 drivers/media/platform/starfive/stf_vin.c     | 1134 +++++++++++++++++
 drivers/media/platform/starfive/stf_vin.h     |  180 +++
 .../media/platform/starfive/stf_vin_hw_ops.c  |  241 ++++
 20 files changed, 4940 insertions(+)
 create mode 100644 Documentation/admin-guide/media/starfive_camss.rst
 create mode 100644 Documentation/admin-guide/media/starfive_camss_graph.dot
 create mode 100644 Documentation/devicetree/bindings/media/starfive,jh7110-camss.yaml
 create mode 100644 drivers/media/platform/starfive/Kconfig
 create mode 100644 drivers/media/platform/starfive/Makefile
 create mode 100644 drivers/media/platform/starfive/stf_camss.c
 create mode 100644 drivers/media/platform/starfive/stf_camss.h
 create mode 100644 drivers/media/platform/starfive/stf_common.h
 create mode 100644 drivers/media/platform/starfive/stf_isp.c
 create mode 100644 drivers/media/platform/starfive/stf_isp.h
 create mode 100644 drivers/media/platform/starfive/stf_isp_hw_ops.c
 create mode 100644 drivers/media/platform/starfive/stf_video.c
 create mode 100644 drivers/media/platform/starfive/stf_video.h
 create mode 100644 drivers/media/platform/starfive/stf_vin.c
 create mode 100644 drivers/media/platform/starfive/stf_vin.h
 create mode 100644 drivers/media/platform/starfive/stf_vin_hw_ops.c