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Subject[PATCH v4 0/8] Add support for DCMI camera interface of STMicroelectronics STM32 SoC series
Date
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 http://www.spinics.net/lists/linux-media/msg113480.html

===========
= history =
===========
version 4:
- "v4l2-compliance -s -f" report
- fix behaviour in case of start_streaming failure (DMA memory shortage for ex.)
- dt-bindings: Fix remarks from Rob Herring:
http://www.mail-archive.com/linux-media@vger.kernel.org/msg111340.html
Add "Acked-by: Rob Herring <robh@kernel.org>"

version 3:
- stm32-dcmi: Add "Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>"
- dt-bindings: Fix remarks from Rob Herring:
http://www.mail-archive.com/linux-media@vger.kernel.org/msg110956.html

version 2:
- Fix a Kbuild warning in probe:
http://www.mail-archive.com/linux-media@vger.kernel.org/msg110678.html
- 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 -s -f -d /dev/video0
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
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x05200001
Video Capture
Read/Write
Streaming
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/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)

Test input 0:

Control ioctls:
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: 3 Private Controls: 0

Format ioctls:
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:
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_REQBUFS/CREATE_BUFS/QUERYBUF: OK
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

Stream using all formats:
test MMAP for Format YUYV, Frame Size 176x144:
Stride 352, Field None: OK
test MMAP for Format YUYV, Frame Size 320x240:
Stride 640, Field None: OK
test MMAP for Format UYVY, Frame Size 176x144:
Stride 352, Field None: OK
test MMAP for Format UYVY, Frame Size 320x240:
Stride 640, Field None: OK
test MMAP for Format RGBP, Frame Size 176x144:
Stride 352, Field None: OK
test MMAP for Format RGBP, Frame Size 320x240:
Stride 640, Field None: OK

Total: 52, Succeeded: 52, 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
board
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

--
1.9.1

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