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Date:   Thu, 31 Dec 2020 15:29:33 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-sunxi@...glegroups.com
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Jonathan Corbet <corbet@....net>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Helen Koike <helen.koike@...labora.com>,
        Dafna Hirschfeld <dafna.hirschfeld@...labora.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        kevin.lhopital@...mail.com
Subject: [PATCH v4 00/15] Allwinner MIPI CSI-2 support for A31/V3s/A83T

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.

Changes since v3:
- Fixed single-item phys description in sun6i mipi csi-2 binding;
- Fixed variables names in macros using container_of;
- Fixed style issue with operators at the end of lines;
- Reworked source endpoint/subdev assignment in sun6i-csi to handle
  link_validate error case;
- Removed unrelated dt change in sun8i-a83t mipi csi-2 driver;
- Added collected tags.

Changes since v2:
- added Kconfig depend on PM since it's not optional;
- removed phy-names for A31 MIPI CSI-2 controller;
- removed v3s compatible in the A31 MIPI CSI-2 controller driver;
- removed A31 CSI controller single-port binding deprecation;
- removed empty dt port definitions;
- fixed minor checkpatch warnings;
- added collected tags;
- added media-ctl output in cover letter.

Changes since v1:
- reworked fwnode and media graph on the CSI controller end to have one port
  per interface, which solves the bus type representation issue;
- removed unused IRQ handlers in the MIPI CSI-2 bridges;
- avoided the use of devm_regmap_init_mmio_clk;
- deasserted reset before enabling clocks;
- fixed reported return code issues (ret |=, missing checks);
- applied requested cosmetic changes (backward goto, etc);
- switched over to runtime PM for the mipi csi-2 bridge drivers;
- selected PHY_SUN6I_MIPI_DPHY in Kconfig for sun6i-mipi-csi2;
- registered nodes with mipi csi-2 bridge subdevs;
- used V4L2 format info instead of switch/case for sun6i-csi bpp;
- fixed device-tree bindings as requested (useless properties, license);
- fixed mipi bridge dt instances names;
- added PHY API documentation about mode/power on order requirement;
- fixed clock error return code in d-phy code;
- fixed D-PHY mode check in d-phy code;
- added MAINTAINERS entries for the new drivers;
- added V4L2 compliance results;
- added various comments and rework commit mesages as requested.

Media ctl outputs for the testing setups are available below:

# sun6i-csi + sun6i-mipi-csi2 + ov5648

Media device information
------------------------
driver          sun6i-csi
model           Allwinner Video Capture Device
serial          
bus info        platform:1cb0000.camera
hw revision     0x0
driver version  5.10.0

Device topology
- entity 1: sun6i-csi (2 pads, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
	pad0: Sink
	pad1: Sink
		<- "sun6i-mipi-csi2":1 [ENABLED]

- entity 6: sun6i-mipi-csi2 (2 pads, 2 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
	pad0: Sink
		[fmt:unknown/0x0]
		<- "ov5648 0-0036":0 [ENABLED,IMMUTABLE]
	pad1: Source
		[fmt:unknown/0x0]
		-> "sun6i-csi":1 [ENABLED]

- entity 9: ov5648 0-0036 (1 pad, 1 link)
            type V4L2 subdev subtype Sensor flags 0
            device node name /dev/v4l-subdev1
	pad0: Source
		[fmt:SBGGR8_1X8/2592x1944@...5 field:none colorspace:raw xfer:none ycbcr:601 quantization:full-range]
		-> "sun6i-mipi-csi2":0 [ENABLED,IMMUTABLE]

# sun6i-csi + sun8i-a83t-mipi-csi2 + ov8865

Media device information
------------------------
driver          sun6i-csi
model           Allwinner Video Capture Device
serial          
bus info        platform:1cb0000.camera
hw revision     0x0
driver version  5.10.0

Device topology
- entity 1: sun6i-csi (2 pads, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
	pad0: Sink
	pad1: Sink
		<- "sun8i-a83t-mipi-csi2":1 [ENABLED]

- entity 6: sun8i-a83t-mipi-csi2 (2 pads, 2 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
	pad0: Sink
		[fmt:unknown/0x0]
		<- "ov8865 1-0036":0 [ENABLED,IMMUTABLE]
	pad1: Source
		[fmt:unknown/0x0]
		-> "sun6i-csi":1 [ENABLED]

- entity 9: ov8865 1-0036 (1 pad, 1 link)
            type V4L2 subdev subtype Sensor flags 0
            device node name /dev/v4l-subdev1
	pad0: Source
		[fmt:SBGGR10_1X10/3264x2448@...0 field:none colorspace:raw xfer:none ycbcr:601 quantization:full-range]
		-> "sun8i-a83t-mipi-csi2":0 [ENABLED,IMMUTABLE]

V4L2 compliance runs are available below:

# sun6i-csi + sun6i-mipi-csi2 + ov5648

v4l2-compliance SHA: not available, 32 bits

Compliance test for sun6i-video device /dev/video0:

Driver Info:
	Driver name      : sun6i-video
	Card type        : sun6i-csi
	Bus info         : platform:camera
	Driver version   : 5.10.0
	Capabilities     : 0x84200001
		Video Capture
		Streaming
		Extended Pix Format
		Device Capabilities
	Device Caps      : 0x04200001
		Video Capture
		Streaming
		Extended Pix Format
Media Driver Info:
	Driver name      : sun6i-csi
	Model            : Allwinner Video Capture Device
	Serial           : 
	Bus info         : platform:1cb0000.camera
	Media version    : 5.10.0
	Hardware revision: 0x00000000 (0)
	Driver version   : 5.10.0
Interface Info:
	ID               : 0x03000004
	Type             : V4L Video
Entity Info:
	ID               : 0x00000001 (1)
	Name             : sun6i-csi
	Function         : V4L2 I/O
	Pad 0x01000002   : 0: Sink
	Pad 0x01000003   : 1: Sink
	  Link 0x0200000d: from remote pad 0x1000008 of entity 'sun6i-mipi-csi2': Data, Enabled

Required ioctls:
	test MC information (see 'Media Driver Info' above): OK
		warn: v4l2-compliance.cpp(633): media bus_info 'platform:1cb0000.camera' differs from V4L2 bus_info 'platform:camera'
	test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
	test second /dev/video0 open: OK
		warn: v4l2-compliance.cpp(633): media bus_info 'platform:1cb0000.camera' differs from V4L2 bus_info 'platform:camera'
	test VIDIOC_QUERYCAP: OK
	test VIDIOC_G/S_PRIORITY: OK
	test for unlimited opens: OK

Debug ioctls:
	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
	test VIDIOC_LOG_STATUS: OK

Input ioctls:
	test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
	test VIDIOC_ENUMAUDIO: OK (Not Supported)
	test VIDIOC_G/S/ENUMINPUT: OK
	test VIDIOC_G/S_AUDIO: OK (Not Supported)
	Inputs: 1 Audio Inputs: 0 Tuners: 0

Output ioctls:
	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
	Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
	test VIDIOC_G/S_EDID: OK (Not Supported)

Control ioctls (Input 0):
		warn: v4l2-test-controls.cpp(92): Exposure: (max - min) % step != 0
		warn: v4l2-test-controls.cpp(92): Gain: (max - min) % step != 0
		warn: v4l2-test-controls.cpp(92): Exposure: (max - min) % step != 0
		warn: v4l2-test-controls.cpp(92): Gain: (max - min) % step != 0
	test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
	test VIDIOC_QUERYCTRL: OK
		warn: v4l2-test-controls.cpp(368): Gain: returned control value 44 not a multiple of step
		warn: v4l2-test-controls.cpp(368): Gain: returned control value 44 not a multiple of step
		warn: v4l2-test-controls.cpp(368): Gain: returned control value 44 not a multiple of step
		warn: v4l2-test-controls.cpp(368): Gain: returned control value 44 not a multiple of step
	test VIDIOC_G/S_CTRL: OK
		warn: v4l2-test-controls.cpp(555): Gain: returned control value 44 not a multiple of step
	test VIDIOC_G/S/TRY_EXT_CTRLS: OK
	test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
	test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
	Standard Controls: 15 Private Controls: 0

Format ioctls (Input 0):
	test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
	test VIDIOC_G/S_PARM: OK (Not Supported)
	test VIDIOC_G_FBUF: OK (Not Supported)
	test VIDIOC_G_FMT: OK
	test VIDIOC_TRY_FMT: OK
	test VIDIOC_S_FMT: OK
	test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
	test Cropping: OK (Not Supported)
	test Composing: OK (Not Supported)
	test Scaling: OK

Codec ioctls (Input 0):
	test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
	test VIDIOC_G_ENC_INDEX: OK (Not Supported)
	test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

Buffer ioctls (Input 0):
	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
		fail: v4l2-test-buffers.cpp(755): q.export_bufs(node, q.g_type())
	test VIDIOC_EXPBUF: FAIL
	test Requests: OK (Not Supported)

Total for sun6i-video device /dev/video0: 45, Succeeded: 44, Failed: 1, Warnings: 1

# sun6i-csi + sun8i-a83t-mipi-csi2 + ov8865

v4l2-compliance SHA: not available, 32 bits

Compliance test for sun6i-video device /dev/video0:

Driver Info:
	Driver name      : sun6i-video
	Card type        : sun6i-csi
	Bus info         : platform:camera
	Driver version   : 5.10.0
	Capabilities     : 0x84200001
		Video Capture
		Streaming
		Extended Pix Format
		Device Capabilities
	Device Caps      : 0x04200001
		Video Capture
		Streaming
		Extended Pix Format
Media Driver Info:
	Driver name      : sun6i-csi
	Model            : Allwinner Video Capture Device
	Serial           : 
	Bus info         : platform:1cb0000.camera
	Media version    : 5.10.0
	Hardware revision: 0x00000000 (0)
	Driver version   : 5.10.0
Interface Info:
	ID               : 0x03000004
	Type             : V4L Video
Entity Info:
	ID               : 0x00000001 (1)
	Name             : sun6i-csi
	Function         : V4L2 I/O
	Pad 0x01000002   : 0: Sink
	Pad 0x01000003   : 1: Sink
	  Link 0x0200000d: from remote pad 0x1000008 of entity 'sun8i-a83t-mipi-csi2': Data, Enabled

Required ioctls:
	test MC information (see 'Media Driver Info' above): OK
		warn: v4l2-compliance.cpp(633): media bus_info 'platform:1cb0000.camera' differs from V4L2 bus_info 'platform:camera'
	test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
	test second /dev/video0 open: OK
		warn: v4l2-compliance.cpp(633): media bus_info 'platform:1cb0000.camera' differs from V4L2 bus_info 'platform:camera'
	test VIDIOC_QUERYCAP: OK
	test VIDIOC_G/S_PRIORITY: OK
	test for unlimited opens: OK

Debug ioctls:
	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
	test VIDIOC_LOG_STATUS: OK

Input ioctls:
	test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
	test VIDIOC_ENUMAUDIO: OK (Not Supported)
	test VIDIOC_G/S/ENUMINPUT: OK
	test VIDIOC_G/S_AUDIO: OK (Not Supported)
	Inputs: 1 Audio Inputs: 0 Tuners: 0

Output ioctls:
	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
	Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
	test VIDIOC_G/S_EDID: OK (Not Supported)

Control ioctls (Input 0):
		warn: v4l2-test-controls.cpp(92): Exposure: (max - min) % step != 0
		warn: v4l2-test-controls.cpp(92): Gain: (max - min) % step != 0
		warn: v4l2-test-controls.cpp(92): Exposure: (max - min) % step != 0
		warn: v4l2-test-controls.cpp(92): Gain: (max - min) % step != 0
	test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
	test VIDIOC_QUERYCTRL: OK
	test VIDIOC_G/S_CTRL: OK
	test VIDIOC_G/S/TRY_EXT_CTRLS: OK
	test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
	test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
	Standard Controls: 11 Private Controls: 0

Format ioctls (Input 0):
	test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
	test VIDIOC_G/S_PARM: OK (Not Supported)
	test VIDIOC_G_FBUF: OK (Not Supported)
	test VIDIOC_G_FMT: OK
	test VIDIOC_TRY_FMT: OK
	test VIDIOC_S_FMT: OK
	test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
	test Cropping: OK (Not Supported)
	test Composing: OK (Not Supported)
	test Scaling: OK

Codec ioctls (Input 0):
	test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
	test VIDIOC_G_ENC_INDEX: OK (Not Supported)
	test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

Buffer ioctls (Input 0):
	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
	test VIDIOC_EXPBUF: OK
	test Requests: OK (Not Supported)

Total for sun6i-video device /dev/video0: 45, Succeeded: 45, Failed: 0, Warnings: 6

Paul Kocialkowski (15):
  docs: phy: Add a part about PHY mode and submode
  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: Use common V4L2 format info for storage bpp
  media: sun6i-csi: Only configure the interface data width for parallel
  dt-bindings: media: sun6i-a31-csi: Add MIPI CSI-2 input port
  media: sun6i-csi: Add support for MIPI CSI-2 bridge input
  dt-bindings: media: Add A31 MIPI CSI-2 bindings documentation
  media: sunxi: Add support for the A31 MIPI CSI-2 controller
  ARM: dts: sun8i: v3s: Add nodes for MIPI CSI-2 support
  MAINTAINERS: Add entry for the Allwinner A31 MIPI CSI-2 bridge
  dt-bindings: media: 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
  MAINTAINERS: Add entry for the Allwinner A83T MIPI CSI-2 bridge

 .../media/allwinner,sun6i-a31-csi.yaml        |  88 ++-
 .../media/allwinner,sun6i-a31-mipi-csi2.yaml  | 149 ++++
 .../media/allwinner,sun8i-a83t-mipi-csi2.yaml | 147 ++++
 Documentation/driver-api/phy/phy.rst          |  18 +
 MAINTAINERS                                   |  16 +
 arch/arm/boot/dts/sun8i-a83t.dtsi             |  26 +
 arch/arm/boot/dts/sun8i-v3s.dtsi              |  67 ++
 drivers/media/platform/sunxi/Kconfig          |   2 +
 drivers/media/platform/sunxi/Makefile         |   2 +
 .../platform/sunxi/sun6i-csi/sun6i_csi.c      | 165 +++--
 .../platform/sunxi/sun6i-csi/sun6i_csi.h      |  64 +-
 .../platform/sunxi/sun6i-csi/sun6i_video.c    |  57 +-
 .../platform/sunxi/sun6i-csi/sun6i_video.h    |   7 +-
 .../platform/sunxi/sun6i-mipi-csi2/Kconfig    |  12 +
 .../platform/sunxi/sun6i-mipi-csi2/Makefile   |   4 +
 .../sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.c   | 590 ++++++++++++++++
 .../sunxi/sun6i-mipi-csi2/sun6i_mipi_csi2.h   | 117 ++++
 .../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                    | 657 ++++++++++++++++++
 .../sun8i_a83t_mipi_csi2.h                    | 197 ++++++
 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 +
 26 files changed, 2587 insertions(+), 124 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

-- 
2.29.2

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