[00/23] Add Tegra20 parallel video input capture

From: Luca Ceresoli <luca.ceresoli@bootlin.com>

Tegra20 and other Tegra SoCs have a video input (VI) peripheral that can
receive from either MIPI CSI-2 or parallel video (called respectively "CSI"
and "VIP" in the documentation). The kernel currently has a staging driver
for Tegra210 CSI capture. This patch set adds support for Tegra20 VIP
capture.

Unfortunately I had no real documentation available to base this work on,
and I started from a working downstream 3.1 kernel, that I have heavily
reworked to fit into the existing tegra-video driver. The existing code
appears written with the intent of being modular and allow adding new input
mechanisms and new SoCs while keeping a unique VI core module. However its
modularity and extensibility was not enough to add Tegra20 VIP support, so
I added some hooks to turn hard-coded behaviour into per-SoC or per-bus
customizable code. There are also some fixes, some generic cleanups and DT
bindings.

Quick tour of the patches:

 * Device tree bindings and minor DTS improvements

   01. dt-bindings: display: tegra: add bindings for Tegra20 VIP
   02. dt-bindings: display: tegra: vi: add 'vip' property and example
   03. ARM: dts: tegra20: add label to nvidia,tegra20-vi node
   04. ARM: dts: tegra20-tamonten: add label to avdd_vdac regulator

 * A fix

   05. staging: media: tegra-video: fix .vidioc_enum_fmt_vid_cap to return all formats

 * Minor improvements to logging, comments, cleanups

   06. staging: media: tegra-video: improve documentation of tegra_video_format fields
   07. staging: media: tegra-video: document tegra_channel_get_remote_source_subdev
   08. staging: media: tegra-video: fix typos in comment
   09. staging: media: tegra-video: improve error messages
   10. staging: media: tegra-video: slightly simplify cleanup on errors
   11. staging: media: tegra-video: move private struct declaration to C file
   12. staging: media: tegra-video: remove unneeded include

 * Preparation to make the VI module generic enough to host Tegra20 and VIP

   13. staging: media: tegra-video: Kconfig: allow TPG only on Tegra210
   14. staging: media: tegra-video: move tegra_channel_fmt_align to a per-soc op
   15. staging: media: tegra-video: move default format to soc-specific data
   16. staging: media: tegra-video: move MIPI calibration calls from VI to CSI
   17. staging: media: tegra-video: add a per-soc enable/disable op
   18. staging: media: tegra-video: move syncpt init/free to a per-soc op
   19. staging: media: tegra-video: add syncpts for Tegra20 to struct tegra_vi
   20. staging: media: tegra-video: add hooks for planar YUV and H/V flip
   21. staging: media: tegra-video: add H/V flip controls

 * Implementation of VIP and Tegra20

   22. staging: media: tegra-video: add support for VIP (parallel video input)
   23. staging: media: tegra-video: add tegra20 variant

Enjoy!

Luca

Luca Ceresoli (23):
  dt-bindings: display: tegra: add bindings for Tegra20 VIP
  dt-bindings: display: tegra: vi: add 'vip' property and example
  ARM: dts: tegra20: add label to nvidia,tegra20-vi node
  ARM: dts: tegra20-tamonten: add label to avdd_vdac regulator
  staging: media: tegra-video: fix .vidioc_enum_fmt_vid_cap to return
    all formats
  staging: media: tegra-video: improve documentation of
    tegra_video_format fields
  staging: media: tegra-video: document
    tegra_channel_get_remote_source_subdev
  staging: media: tegra-video: fix typos in comment
  staging: media: tegra-video: improve error messages
  staging: media: tegra-video: slightly simplify cleanup on errors
  staging: media: tegra-video: move private struct declaration to C file
  staging: media: tegra-video: remove unneeded include
  staging: media: tegra-video: Kconfig: allow TPG only on Tegra210
  staging: media: tegra-video: move tegra_channel_fmt_align to a per-soc
    op
  staging: media: tegra-video: move default format to soc-specific data
  staging: media: tegra-video: move MIPI calibration calls from VI to
    CSI
  staging: media: tegra-video: add a per-soc enable/disable op
  staging: media: tegra-video: move syncpt init/free to a per-soc op
  staging: media: tegra-video: add syncpts for Tegra20 to struct
    tegra_vi
  staging: media: tegra-video: add hooks for planar YUV and H/V flip
  staging: media: tegra-video: add H/V flip controls
  staging: media: tegra-video: add support for VIP (parallel video
    input)
  staging: media: tegra-video: add tegra20 variant

 .../display/tegra/nvidia,tegra20-vi.yaml      |  68 ++
 .../display/tegra/nvidia,tegra20-vip.yaml     |  64 ++
 MAINTAINERS                                   |  10 +
 arch/arm/boot/dts/tegra20-tamonten.dtsi       |   2 +-
 arch/arm/boot/dts/tegra20.dtsi                |   2 +-
 drivers/staging/media/tegra-video/Kconfig     |   1 +
 drivers/staging/media/tegra-video/Makefile    |   2 +
 drivers/staging/media/tegra-video/csi.c       |  44 ++
 drivers/staging/media/tegra-video/tegra20.c   | 649 ++++++++++++++++++
 drivers/staging/media/tegra-video/tegra210.c  |  97 ++-
 drivers/staging/media/tegra-video/vi.c        | 321 ++-------
 drivers/staging/media/tegra-video/vi.h        |  76 +-
 drivers/staging/media/tegra-video/video.c     |   5 +
 drivers/staging/media/tegra-video/video.h     |   2 +-
 drivers/staging/media/tegra-video/vip.c       | 298 ++++++++
 drivers/staging/media/tegra-video/vip.h       |  72 ++
 16 files changed, 1425 insertions(+), 288 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
 create mode 100644 drivers/staging/media/tegra-video/tegra20.c
 create mode 100644 drivers/staging/media/tegra-video/vip.c
 create mode 100644 drivers/staging/media/tegra-video/vip.h