[PATCH 00/14] Allwinner MIPI CSI-2 support for A31/V3s/A83T

[Paul Kocialkowski <paul.kocialkowski@bootlin.com>]

This series introduces support for MIPI CSI-2, with the A31 controller that is
found on most SoCs (A31, V3s and probably V5) as well as the A83T-specific
controller. While the former uses the same MIPI D-PHY that is already supported
for DSI, the latter embeds its own D-PHY.

In order to distinguish the use of the D-PHY between Rx mode (for MIPI CSI-2)
and Tx mode (for MIPI DSI), a submode is introduced for D-PHY in the PHY API.
This allows adding Rx support in the A31 D-PHY driver.

A few changes and fixes are applied to the A31 CSI controller driver, in order
to support the MIPI CSI-2 use-case.

Follows is the V4L2 device topology representing the interactions between
the MIPI CSI-2 sensor, the MIPI CSI-2 controller (which controls the D-PHY)
and the CSI controller:
- entity 1: sun6i-csi (1 pad, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
	pad0: Sink
		<- "sun6i-mipi-csi2":1 [ENABLED,IMMUTABLE]

- entity 5: sun6i-mipi-csi2 (2 pads, 2 links)
            type V4L2 subdev subtype Unknown flags 0
	pad0: Sink
		<- "ov5648 0-0036":0 [ENABLED,IMMUTABLE]
	pad1: Source
		-> "sun6i-csi":0 [ENABLED,IMMUTABLE]

- entity 8: ov5648 0-0036 (1 pad, 1 link)
            type V4L2 subdev subtype Sensor flags 0
            device node name /dev/v4l-subdev0
	pad0: Source
		[fmt:SBGGR8_1X8/640x480@1/30 field:none colorspace:raw xfer:none ycbcr:601 quantization:full-range]
		-> "sun6i-mipi-csi2":0 [ENABLED,IMMUTABLE]

Happy reviewing!

Paul Kocialkowski (14):
  phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes
  phy: allwinner: phy-sun6i-mipi-dphy: Support D-PHY Rx mode for MIPI
    CSI-2
  media: sun6i-csi: Support an optional dedicated memory pool
  media: sun6i-csi: Fix the image storage bpp for 10/12-bit Bayer
    formats
  media: sun6i-csi: Only configure the interface data width for parallel
  media: sun6i-csi: Support feeding from the MIPI CSI-2 controller
  dt-bindings: media: i2c: Add A31 MIPI CSI-2 bindings documentation
  media: sunxi: Add support for the A31 MIPI CSI-2 controller
  ARM: dts: sun8i: v3s: Add CSI0 camera interface node
  ARM: dts: sun8i: v3s: Add MIPI D-PHY and MIPI CSI-2 interface nodes
  dt-bindings: media: i2c: Add A83T MIPI CSI-2 bindings documentation
  media: sunxi: Add support for the A83T MIPI CSI-2 controller
  ARM: dts: sun8i: a83t: Add MIPI CSI-2 controller node
  media: sunxi: sun8i-a83t-mipi-csi2: Avoid using the (unsolicited)
    interrupt

 .../media/allwinner,sun6i-a31-mipi-csi2.yaml  | 168 +++++
 .../media/allwinner,sun8i-a83t-mipi-csi2.yaml | 158 +++++
 arch/arm/boot/dts/sun8i-a83t.dtsi             |  26 +
 arch/arm/boot/dts/sun8i-v3s.dtsi              |  62 ++
 drivers/media/platform/sunxi/Kconfig          |   2 +
 drivers/media/platform/sunxi/Makefile         |   2 +
 .../platform/sunxi/sun6i-csi/sun6i_csi.c      |  54 +-
 .../platform/sunxi/sun6i-csi/sun6i_csi.h      |  20 +-
 .../platform/sunxi/sun6i-mipi-csi2/Kconfig    |  11 +
 .../platform/sunxi/sun6i-mipi-csi2/Makefile   |   4 +
 .../sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.c   | 635 +++++++++++++++++
 .../sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.h   | 116 +++
 .../sunxi/sun8i-a83t-mipi-csi2/Kconfig        |  11 +
 .../sunxi/sun8i-a83t-mipi-csi2/Makefile       |   4 +
 .../sun8i-a83t-mipi-csi2/sun8i_a83t_dphy.c    |  92 +++
 .../sun8i-a83t-mipi-csi2/sun8i_a83t_dphy.h    |  39 ++
 .../sun8i_a83t_mipi_csi2.c                    | 660 ++++++++++++++++++
 .../sun8i_a83t_mipi_csi2.h                    | 196 ++++++
 drivers/phy/allwinner/phy-sun6i-mipi-dphy.c   | 164 ++++-
 drivers/staging/media/rkisp1/rkisp1-isp.c     |   3 +-
 include/linux/phy/phy-mipi-dphy.h             |  13 +
 21 files changed, 2408 insertions(+), 32 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/allwinner,sun6i-a31-mipi-csi2.yaml
 create mode 100644 Documentation/devicetree/bindings/media/allwinner,sun8i-a83t-mipi-csi2.yaml
 create mode 100644 drivers/media/platform/sunxi/sun6i-mipi-csi2/Kconfig
 create mode 100644 drivers/media/platform/sunxi/sun6i-mipi-csi2/Makefile
 create mode 100644 drivers/media/platform/sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.c
 create mode 100644 drivers/media/platform/sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.h
 create mode 100644 drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/Kconfig
 create mode 100644 drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/Makefile
 create mode 100644 drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_dphy.c
 create mode 100644 drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_dphy.h
 create mode 100644 drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c
 create mode 100644 drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.h

-- 
2.28.0