1TODO 2==== 3 41. Items which MUST be fixed before the driver can be moved out of staging: 5 6* Remove/disable private IOCTLs 7 8* Remove/disable custom v4l2-ctrls 9 10* Remove unnecessary/unwanted module parameters 11 12* Remove abuse of priv field in various v4l2 userspace API structs 13 14* Without a 3A library the capture behaviour is not very good. To take a good 15 picture, the exposure/gain needs to be tuned using v4l2-ctl on the sensor 16 subdev. To fix this, support for the atomisp needs to be added to libcamera. 17 18 This MUST be done before moving the driver out of staging so that we can 19 still make changes to e.g. the mediactl topology if necessary for 20 libcamera integration. Since this would be a userspace API break, this 21 means that at least proof-of-concept libcamera integration needs to be 22 ready before moving the driver out of staging. 23 24 252. Items which SHOULD also be fixed eventually: 26 27* The driver is intended to drive the PCI exposed versions of the device. 28 It will not detect those devices enumerated via ACPI as a field of the 29 i915 GPU driver (only a problem on BYT). 30 31 There are some patches adding i915 GPU support floating at the Yocto's 32 Aero repository (so far, untested upstream). 33 34* Ensure that the driver will pass v4l2-compliance tests 35 36* Fix not all v4l2 apps working, e.g. cheese does not work 37 38* The atomisp code still has a lot of cruft which needs cleaning up 39 40 41Testing 42======= 43 44Since libcamera support is not available yet, the easiest way to test for 45now is using v4l2-ctl to select the input and gstreamer for streaming. 46 47To select the input run: 48 49v4l2-ctl -i <input> 50 51Where <input> is 0 (front cam) or 1 (back cam). 52 53The simplest gstreamer pipeline for testing running the sensor 54at its max resolution is: 55 56gst-launch-1.0 v4l2src ! videoconvert ! xvimagesink sync=false 57 58To select e.g 640x480 as resolution use: 59 60gst-launch-1.0 v4l2src ! video/x-raw,format=YV12,width=640,height=480 ! \ 61 videoconvert ! xvimagesink sync=false 62 63And to show fps use: 64 65gst-launch-1.0 v4l2src ! video/x-raw,format=YV12,width=640,height=480 ! \ 66 videoconvert ! fpsdisplaysink video-sink=xvimagesink sync=false 67 68Often the image will be over / under exposed. This can be fixed by using 69v4l2-ctl on the sensor subdev to tweak the exposure ctrl; or by using a GUI 70app for v4l2-controls which also supports subdev such as the Fedora patched 71gtk-v4l tool. 72