On 8/15/2016 15:15, Hans Verkuil wrote:
On 08/15/2016 08:09 AM, Wu, Songjun wrote:
On 8/12/2016 15:32, Hans Verkuil wrote:
One quick question:
On 08/11/2016 09:06 AM, Songjun Wu wrote:
The Image Sensor Controller driver includes two parts.
1) Driver code to implement the ISC function.
2) Device tree binding documentation, it describes how
to add the ISC in device tree.
Test result with v4l-utils.
# v4l2-compliance -f
v4l2-compliance SHA : not available
Driver Info:
Driver name : atmel_isc
Card type : Atmel Image Sensor Controller
Bus info : platform:atmel_isc f0008000.isc
Driver version: 4.7.0
Capabilities : 0x84200001
Video Capture
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04200001
Video Capture
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 (Not Supported)
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 (Not Supported)
test VIDIOC_QUERYCTRL: OK (Not Supported)
test VIDIOC_G/S_CTRL: OK (Not Supported)
test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported)
test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not Supported)
test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
Standard Controls: 0 Private Controls: 0
Can you confirm that the sensor subdevice you are using does not have any
controls?
I ask since that is fairly unusual, so I want to make sure that controls are
really
not supported in this setup.
Sorry for the late reply.
The subdevice I use supports controls, but I did not develop the v4l2
controls in the sensor driver.
So you mean the sensor hardware has controls, but the sensor driver doesn't
implement
them? Do I understand you correctly?
Yes, your understanding is correct.
Should I add the v4l2 controls and test again?
If the sensor driver does not implement controls (i.e. has a struct
v4l2_ctrl_handler),
then everything is fine and the v4l2-compliance output is correct.
Please confirm this. I just want to be 100% certain about this before I make
the pull
request.
I can confirm this. I use the sensor ov7740, and the driver is developed
by myself, I did not add the v4l2 controls into the sensor driver for now.
Thanks,
Hans
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