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Date:   Tue, 4 Apr 2017 17:44:30 +0200
From:   Hugues Fruchet <>
To:     Rob Herring <>,
        Mark Rutland <>,
        Maxime Coquelin <>,
        Alexandre Torgue <>,
        Mauro Carvalho Chehab <>,
        Hans Verkuil <>
CC:     <>,
        <>, <>,
        Benjamin Gaignard <>,
        Yannick Fertre <>,
        Hugues Fruchet <>
Subject: [PATCH v3 0/8] Add support for DCMI camera interface of STMicroelectronics STM32 SoC series

This patchset introduces a basic support for Digital Camera Memory Interface
(DCMI) of STMicroelectronics STM32 SoC series.

This first basic support implements RGB565 & YUV frame grabbing.
Cropping and JPEG support will be added later on.

This has been tested on STM324x9I-EVAL evaluation board embedding
an OV2640 camera sensor.

This driver depends on:
  - [PATCHv6 00/14] atmel-isi/ov7670/ov2640: convert to standalone drivers

= history =
version 3:
  - stm32-dcmi: Add "Reviewed-by: Hans Verkuil <>"
  - dt-bindings: Fix remarks from Rob Herring:

version 2:
  - Fix a Kbuild warning in probe:
  - Fix a warning in dcmi_queue_setup()
  - dt-bindings: warn on sensor signals level inversion in board example
  - Typos fixing

version 1:
  - Initial submission

= v4l2-compliance =
Below is the v4l2-compliance report for this current version of the DCMI camera interface.
v4l2-compliance has been built from v4l-utils-1.12.3.

v4l2-compliance SHA   : f5f45e17ee98a0ebad7836ade2b34ceec909d751

Driver Info:
        Driver name   : stm32-dcmi
        Card type     : STM32 Digital Camera Memory Int
        Bus info      : platform:dcmi
        Driver version: 4.11.0
        Capabilities  : 0x85200001
                Video Capture
                Extended Pix Format
                Device Capabilities
        Device Caps   : 0x05200001
                Video Capture
                Extended Pix Format

Compliance test for device /dev/video0 (not using libv4l2):

Required ioctls:
        test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
        test second video open: OK
        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_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)

Test input 0:

        Control ioctls:
                test VIDIOC_QUERYCTRL: OK
                test VIDIOC_G/S_CTRL: OK
                test VIDIOC_G/S/TRY_EXT_CTRLS: OK
                test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
                Standard Controls: 3 Private Controls: 0

        Format ioctls:
                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:
                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:
                test VIDIOC_EXPBUF: OK

Test input 0:

Streaming ioctls:
        test read/write: OK
        test MMAP: OK
        test USERPTR: OK (Not Supported)
        test DMABUF: Cannot test, specify --expbuf-device

Total: 46, Succeeded: 46, Failed: 0, Warnings: 0

Hugues Fruchet (8):
  dt-bindings: Document STM32 DCMI bindings
  [media] stm32-dcmi: STM32 DCMI camera interface driver
  ARM: dts: stm32: Enable DCMI support on STM32F429 MCU
  ARM: dts: stm32: Enable DCMI camera interface on STM32F429-EVAL board
  ARM: dts: stm32: Enable STMPE1600 gpio expander of STM32F429-EVAL
  ARM: dts: stm32: Enable OV2640 camera support of STM32F429-EVAL board
  ARM: configs: stm32: STMPE1600 GPIO expander
  ARM: configs: stm32: DCMI + OV2640 camera support

 .../devicetree/bindings/media/st,stm32-dcmi.txt    |   46 +
 arch/arm/boot/dts/stm32429i-eval.dts               |   56 +
 arch/arm/boot/dts/stm32f429.dtsi                   |   37 +
 arch/arm/configs/stm32_defconfig                   |    9 +
 drivers/media/platform/Kconfig                     |   12 +
 drivers/media/platform/Makefile                    |    2 +
 drivers/media/platform/stm32/Makefile              |    1 +
 drivers/media/platform/stm32/stm32-dcmi.c          | 1419 ++++++++++++++++++++
 8 files changed, 1582 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/st,stm32-dcmi.txt
 create mode 100644 drivers/media/platform/stm32/Makefile
 create mode 100644 drivers/media/platform/stm32/stm32-dcmi.c


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