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[v4,0/3] DCMI bridge support

Message ID 1564577783-18627-1-git-send-email-hugues.fruchet@st.com (mailing list archive)
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Series DCMI bridge support | expand

Message

Hugues FRUCHET July 31, 2019, 12:56 p.m. UTC
This patch serie allows to connect non-parallel camera sensor to
DCMI thanks to a bridge connected in between such as STMIPID02 [1].

Media controller support is introduced first, then support of
several sub-devices within pipeline with dynamic linking
between them.
In order to keep backward compatibility with applications
relying on V4L2 interface only, format set on video node
is propagated to all sub-devices connected to camera interface.

[1] https://www.spinics.net/lists/devicetree/msg278002.html

===========
= history =
===========
version 4:
  - Also drop subdev nodes registry as suggested by Hans:
    https://www.spinics.net/lists/arm-kernel/msg743375.html

version 3:
  - Drop media device registry to not expose media controller
    interface to userspace as per Laurent' suggestion:
    https://www.spinics.net/lists/linux-media/msg153417.html
  - Prefer "source" instead of "sensor" and keep it in 
    dcmi_graph_entity struct, move asd as first member
    of struct as per Sakari' suggestion:
    https://www.spinics.net/lists/linux-media/msg153119.html
  - Drop dcmi_graph_deinit() as per Sakari' suggestion:
    https://www.spinics.net/lists/linux-media/msg153417.html

version 2:
  - Fix bus_info not consistent between media and V4L:
    https://www.spinics.net/lists/arm-kernel/msg717676.html
  - Propagation of format set on video node to the sub-devices
    chain connected on camera interface

version 1:
  - Initial submission

Hugues Fruchet (3):
  media: stm32-dcmi: improve sensor subdev naming
  media: stm32-dcmi: add media controller support
  media: stm32-dcmi: add support of several sub-devices

 drivers/media/platform/Kconfig            |   2 +-
 drivers/media/platform/stm32/stm32-dcmi.c | 283 +++++++++++++++++++++++++-----
 2 files changed, 236 insertions(+), 49 deletions(-)

Comments

Hans Verkuil Aug. 7, 2019, 10:15 a.m. UTC | #1
Hi Hugues,

Can you provide the output of the most recent v4l2-compliance?

Use 'v4l2-compliance -s'.

Also, just to confirm, with this v4 there are no /dev/mediaX or
/dev/v4l-subdevX devices created anymore, right?

This v4 looks good to me, I just want to have these final checks
done.

Regards,

	Hans

On 7/31/19 2:56 PM, Hugues Fruchet wrote:
> This patch serie allows to connect non-parallel camera sensor to
> DCMI thanks to a bridge connected in between such as STMIPID02 [1].
> 
> Media controller support is introduced first, then support of
> several sub-devices within pipeline with dynamic linking
> between them.
> In order to keep backward compatibility with applications
> relying on V4L2 interface only, format set on video node
> is propagated to all sub-devices connected to camera interface.
> 
> [1] https://www.spinics.net/lists/devicetree/msg278002.html
> 
> ===========
> = history =
> ===========
> version 4:
>   - Also drop subdev nodes registry as suggested by Hans:
>     https://www.spinics.net/lists/arm-kernel/msg743375.html
> 
> version 3:
>   - Drop media device registry to not expose media controller
>     interface to userspace as per Laurent' suggestion:
>     https://www.spinics.net/lists/linux-media/msg153417.html
>   - Prefer "source" instead of "sensor" and keep it in 
>     dcmi_graph_entity struct, move asd as first member
>     of struct as per Sakari' suggestion:
>     https://www.spinics.net/lists/linux-media/msg153119.html
>   - Drop dcmi_graph_deinit() as per Sakari' suggestion:
>     https://www.spinics.net/lists/linux-media/msg153417.html
> 
> version 2:
>   - Fix bus_info not consistent between media and V4L:
>     https://www.spinics.net/lists/arm-kernel/msg717676.html
>   - Propagation of format set on video node to the sub-devices
>     chain connected on camera interface
> 
> version 1:
>   - Initial submission
> 
> Hugues Fruchet (3):
>   media: stm32-dcmi: improve sensor subdev naming
>   media: stm32-dcmi: add media controller support
>   media: stm32-dcmi: add support of several sub-devices
> 
>  drivers/media/platform/Kconfig            |   2 +-
>  drivers/media/platform/stm32/stm32-dcmi.c | 283 +++++++++++++++++++++++++-----
>  2 files changed, 236 insertions(+), 49 deletions(-)
>
Hugues FRUCHET Aug. 8, 2019, 9:38 a.m. UTC | #2
Hi Hans,

You're welcome, here it is:

1) v4l-utils master branch, commit 
6aa15f7447d4aeca6af1ed7ee9644a0c7e891ece "v4l2-ctl: fix double 
decrementing of stream_count"

2) Cropping test is failed as usual because of OV5640 discrete framesizes

3) No more /dev/media* and /dev/v4l-*:
root@stm32mp1-av96:~# ls -al /dev/video0
crw-rw---- 1 root video 81, 0 Mar 19 17:42 /dev/video0
root@stm32mp1-av96:~# ls -al /dev/media*
ls: cannot access '/dev/media*': No such file or directory
root@stm32mp1-av96:~# ls -al /dev/v4l-*
ls: cannot access '/dev/v4l-*': No such file or directory


root@stm32mp1-av96:~# v4l2-compliance -s
v4l2-compliance SHA: 6aa15f7447d4aeca6af1ed7ee9644a0c7e891ece, 32 bits

Compliance test for stm32-dcmi device /dev/video0:

Driver Info:
         Driver name      : stm32-dcmi
         Card type        : STM32 Camera Memory Interface
         Bus info         : platform:dcmi
         Driver version   : 4.19.49
         Capabilities     : 0x85200001
                 Video Capture
                 Read/Write
                 Streaming
                 Extended Pix Format
                 Device Capabilities
         Device Caps      : 0x05200001
                 Video Capture
                 Read/Write
                 Streaming
                 Extended Pix Format

Required ioctls:
         test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
         test second /dev/video0 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)

Control ioctls (Input 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: 18 Private Controls: 0

Format ioctls (Input 0):
         test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
         test VIDIOC_G/S_PARM: OK
         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)
                 fail: 
../../../../../../../../../sources/v4l-utils/utils/v4l2-compliance/v4l2-test-formats.cpp(1414): 
node->frmsizes_count[pixfm
t] > 1
         test Cropping: FAIL
         test Composing: OK (Not Supported)
         test Scaling: OK (Not Supported)

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)

Test input 0:

Streaming ioctls:
         test read/write: OK
         test blocking wait: OK
         test MMAP (no poll): OK
         test MMAP (select): OK
         test MMAP (epoll): OK
         test USERPTR (no poll): OK (Not Supported)
         test USERPTR (select): OK (Not Supported)
         test DMABUF: Cannot test, specify --expbuf-device

Total for stm32-dcmi device /dev/video0: 51, Succeeded: 50, Failed: 1, 
Warnings: 0


On 8/7/19 12:15 PM, Hans Verkuil wrote:
> Hi Hugues,
> 
> Can you provide the output of the most recent v4l2-compliance?
> 
> Use 'v4l2-compliance -s'.
> 
> Also, just to confirm, with this v4 there are no /dev/mediaX or
> /dev/v4l-subdevX devices created anymore, right?
> 
> This v4 looks good to me, I just want to have these final checks
> done.
> 
> Regards,
> 
> 	Hans
> 

Best regards,
Hugues.
Hans Verkuil Aug. 8, 2019, 9:41 a.m. UTC | #3
Hi Hugues,

On 8/8/19 11:38 AM, Hugues FRUCHET wrote:
> Hi Hans,
> 
> You're welcome, here it is:
> 
> 1) v4l-utils master branch, commit 
> 6aa15f7447d4aeca6af1ed7ee9644a0c7e891ece "v4l2-ctl: fix double 
> decrementing of stream_count"
> 
> 2) Cropping test is failed as usual because of OV5640 discrete framesizes
> 
> 3) No more /dev/media* and /dev/v4l-*:
> root@stm32mp1-av96:~# ls -al /dev/video0
> crw-rw---- 1 root video 81, 0 Mar 19 17:42 /dev/video0
> root@stm32mp1-av96:~# ls -al /dev/media*
> ls: cannot access '/dev/media*': No such file or directory
> root@stm32mp1-av96:~# ls -al /dev/v4l-*
> ls: cannot access '/dev/v4l-*': No such file or directory

Good. One more question: is this tested with two subdevs? So a bridge+sensor?

Regards,

	Hans

> 
> 
> root@stm32mp1-av96:~# v4l2-compliance -s
> v4l2-compliance SHA: 6aa15f7447d4aeca6af1ed7ee9644a0c7e891ece, 32 bits
> 
> Compliance test for stm32-dcmi device /dev/video0:
> 
> Driver Info:
>          Driver name      : stm32-dcmi
>          Card type        : STM32 Camera Memory Interface
>          Bus info         : platform:dcmi
>          Driver version   : 4.19.49
>          Capabilities     : 0x85200001
>                  Video Capture
>                  Read/Write
>                  Streaming
>                  Extended Pix Format
>                  Device Capabilities
>          Device Caps      : 0x05200001
>                  Video Capture
>                  Read/Write
>                  Streaming
>                  Extended Pix Format
> 
> Required ioctls:
>          test VIDIOC_QUERYCAP: OK
> 
> Allow for multiple opens:
>          test second /dev/video0 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)
> 
> Control ioctls (Input 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: 18 Private Controls: 0
> 
> Format ioctls (Input 0):
>          test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
>          test VIDIOC_G/S_PARM: OK
>          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)
>                  fail: 
> ../../../../../../../../../sources/v4l-utils/utils/v4l2-compliance/v4l2-test-formats.cpp(1414): 
> node->frmsizes_count[pixfm
> t] > 1
>          test Cropping: FAIL
>          test Composing: OK (Not Supported)
>          test Scaling: OK (Not Supported)
> 
> 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)
> 
> Test input 0:
> 
> Streaming ioctls:
>          test read/write: OK
>          test blocking wait: OK
>          test MMAP (no poll): OK
>          test MMAP (select): OK
>          test MMAP (epoll): OK
>          test USERPTR (no poll): OK (Not Supported)
>          test USERPTR (select): OK (Not Supported)
>          test DMABUF: Cannot test, specify --expbuf-device
> 
> Total for stm32-dcmi device /dev/video0: 51, Succeeded: 50, Failed: 1, 
> Warnings: 0
> 
> 
> On 8/7/19 12:15 PM, Hans Verkuil wrote:
>> Hi Hugues,
>>
>> Can you provide the output of the most recent v4l2-compliance?
>>
>> Use 'v4l2-compliance -s'.
>>
>> Also, just to confirm, with this v4 there are no /dev/mediaX or
>> /dev/v4l-subdevX devices created anymore, right?
>>
>> This v4 looks good to me, I just want to have these final checks
>> done.
>>
>> Regards,
>>
>> 	Hans
>>
> 
> Best regards,
> Hugues.
>
Hugues FRUCHET Aug. 8, 2019, 10:40 a.m. UTC | #4
Hi Hans,

On 8/8/19 11:41 AM, Hans Verkuil wrote:
> Hi Hugues,
> 
> On 8/8/19 11:38 AM, Hugues FRUCHET wrote:
>> Hi Hans,
>>
>> You're welcome, here it is:
>>
>> 1) v4l-utils master branch, commit
>> 6aa15f7447d4aeca6af1ed7ee9644a0c7e891ece "v4l2-ctl: fix double
>> decrementing of stream_count"
>>
>> 2) Cropping test is failed as usual because of OV5640 discrete framesizes
>>
>> 3) No more /dev/media* and /dev/v4l-*:
>> root@stm32mp1-av96:~# ls -al /dev/video0
>> crw-rw---- 1 root video 81, 0 Mar 19 17:42 /dev/video0
>> root@stm32mp1-av96:~# ls -al /dev/media*
>> ls: cannot access '/dev/media*': No such file or directory
>> root@stm32mp1-av96:~# ls -al /dev/v4l-*
>> ls: cannot access '/dev/v4l-*': No such file or directory
> 
> Good. One more question: is this tested with two subdevs? So a bridge+sensor?

Yes, tested with ov5640 (CSI) => st-mipid02 => stm32-dcmi.

In term of hardware setup, it's an Avenger96 96 board [1] embedding an 
STM32MP157 (DCMI //) and an ST MIPID02 bridge (CSI to //) in order to 
enable CSI video input on high speed expansion connector + a D3 
engineering mezzanine board [2] embedding an OV5640 CSI camera.

&dcmi {
...
	port {
		dcmi_0: endpoint {
			remote-endpoint = <&mipid02_2>;

mipid02: mipid02@14 {
...
			port@0 {
				reg = <0>;

				mipid02_0: endpoint {
					data-lanes = <1 2>;
					remote-endpoint = <&ov5640_0>;
				};
			};
			port@2 {
				reg = <2>;

				mipid02_2: endpoint {
					bus-width = <8>;
					hsync-active = <0>;
					vsync-active = <0>;
					pclk-sample = <0>;
					remote-endpoint = <&dcmi_0>;
				};

ov5640: camera@3c {
...
			ov5640_0: endpoint {
				remote-endpoint = <&mipid02_0>;
				clock-lanes = <0>;
				data-lanes = <1 2>;
			};



[1]
https://www.96boards.org/product/avenger96/
https://wiki.dh-electronics.com/index.php/Avenger96

[2] https://www.96boards.org/product/d3camera/


> 
> Regards,
> 
> 	Hans
> 
>>
>>
>> root@stm32mp1-av96:~# v4l2-compliance -s
>> v4l2-compliance SHA: 6aa15f7447d4aeca6af1ed7ee9644a0c7e891ece, 32 bits
>>
>> Compliance test for stm32-dcmi device /dev/video0:
>>
>> Driver Info:
>>           Driver name      : stm32-dcmi
>>           Card type        : STM32 Camera Memory Interface
>>           Bus info         : platform:dcmi
>>           Driver version   : 4.19.49
>>           Capabilities     : 0x85200001
>>                   Video Capture
>>                   Read/Write
>>                   Streaming
>>                   Extended Pix Format
>>                   Device Capabilities
>>           Device Caps      : 0x05200001
>>                   Video Capture
>>                   Read/Write
>>                   Streaming
>>                   Extended Pix Format
>>
>> Required ioctls:
>>           test VIDIOC_QUERYCAP: OK
>>
>> Allow for multiple opens:
>>           test second /dev/video0 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)
>>
>> Control ioctls (Input 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: 18 Private Controls: 0
>>
>> Format ioctls (Input 0):
>>           test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
>>           test VIDIOC_G/S_PARM: OK
>>           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)
>>                   fail:
>> ../../../../../../../../../sources/v4l-utils/utils/v4l2-compliance/v4l2-test-formats.cpp(1414):
>> node->frmsizes_count[pixfm
>> t] > 1
>>           test Cropping: FAIL
>>           test Composing: OK (Not Supported)
>>           test Scaling: OK (Not Supported)
>>
>> 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)
>>
>> Test input 0:
>>
>> Streaming ioctls:
>>           test read/write: OK
>>           test blocking wait: OK
>>           test MMAP (no poll): OK
>>           test MMAP (select): OK
>>           test MMAP (epoll): OK
>>           test USERPTR (no poll): OK (Not Supported)
>>           test USERPTR (select): OK (Not Supported)
>>           test DMABUF: Cannot test, specify --expbuf-device
>>
>> Total for stm32-dcmi device /dev/video0: 51, Succeeded: 50, Failed: 1,
>> Warnings: 0
>>
>>
>> On 8/7/19 12:15 PM, Hans Verkuil wrote:
>>> Hi Hugues,
>>>
>>> Can you provide the output of the most recent v4l2-compliance?
>>>
>>> Use 'v4l2-compliance -s'.
>>>
>>> Also, just to confirm, with this v4 there are no /dev/mediaX or
>>> /dev/v4l-subdevX devices created anymore, right?
>>>
>>> This v4 looks good to me, I just want to have these final checks
>>> done.
>>>
>>> Regards,
>>>
>>> 	Hans
>>>
>>
>> Best regards,
>> Hugues.
>>
> 

Best regards,
Hugues.