[v5,0/5] Support Nuvoton NPCM Video Capture/Encode Engine

Message

Marvin Lin Aug. 26, 2022, 2:41 a.m. UTC

This patch series add DTS node, dt-bindings document and drivers for Video
Capture/Differentiation Engine (VCD) and Encoding Compression Engine (ECE)
present on Nuvoton NPCM SoCs.

VCD can capture/differentiate video data from digital or analog sources,
then the ECE will compress the data into HEXTILE format.

HEXTILE compressed format is defined in Remote Framebuffer Protocol (RFC
6143) and is used by VNC features, so we also add a patch to support it.

Changes in v5:
  - Simplify function prefix "nuvoton_" to "npcm_".
  - Increase VCD_BUSY_TIMEOUT_US and ECE_POLL_TIMEOUT_US to 300ms to
    prevent polling timeout when ECC is enabled or system is busy.

Changes in v4:
  - Fix compile warning reported by kernel test robot.

Changes in v3:
  - Add video driver entry in MAINTAINERS.
  - Change config name to CONFIG_VIDEO_NPCM_VCD_ECE.
  - Reduce the waiting time after resetting the VCD/ECE module.
  - Correct data types of some variables.

Changes in v2:
  - Add Hextile document and locate with vendor formats.

Marvin Lin (5):
  arm: dts: Add node for NPCM Video Capture/Encode Engine
  dt-bindings: media: Add dt-bindings for NPCM Video Capture/Encode
    Engine
  dt-bindings: arm/npcm: Add dt-bindings for Graphics Core Information
  media: Add HEXTILE compressed format
  drivers: media: platform: Add NPCM Video Capture/Encode Engine driver

 .../bindings/arm/npcm/nuvoton,gfxi.yaml       |   41 +
 .../bindings/media/nuvoton,npcm-video.yaml    |   87 +
 .../media/v4l/pixfmt-reserved.rst             |    7 +
 MAINTAINERS                                   |    9 +
 arch/arm/boot/dts/nuvoton-common-npcm7xx.dtsi |   19 +
 drivers/media/platform/Kconfig                |    1 +
 drivers/media/platform/Makefile               |    1 +
 drivers/media/platform/nuvoton/Kconfig        |   12 +
 drivers/media/platform/nuvoton/Makefile       |    2 +
 drivers/media/platform/nuvoton/npcm-video.c   | 2056 +++++++++++++++++
 drivers/media/v4l2-core/v4l2-ioctl.c          |    1 +
 include/uapi/linux/videodev2.h                |    1 +
 12 files changed, 2237 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/npcm/nuvoton,gfxi.yaml
 create mode 100644 Documentation/devicetree/bindings/media/nuvoton,npcm-video.yaml
 create mode 100644 drivers/media/platform/nuvoton/Kconfig
 create mode 100644 drivers/media/platform/nuvoton/Makefile
 create mode 100644 drivers/media/platform/nuvoton/npcm-video.c