[libcamera-devel] [PATCH v4 0/4] libcamera: Fix issues with vimc and Linux v5.2

[Niklas Söderlund]

Hi,

The recently release Linux v5.2 changes the vimc drivers behavior in a
way which breaks libcameras vimc pipeline and some of our tests. This
small series aims to solve this and keep libcamera functioning on both
v5.1 (and earlier) and v5.2.

Patch 1/4 is a small preparation patch. While 2/4 switches the vimc
pipeline to use the RGB/YUV capture video node instead of a raw capture
node. Patch 3/4 fixes issues introduced by [1] and finally 4/4 fixes an
issue introduced by [2]. The whole series is tested on v5.1 and v5.2 on
top of libcamera master branch and all tests pass again.

1. 85ab1aa1fac17bcd ("media: vimc: deb: fix default sink bayer format")
2. b6c61a6c37317efd ("media: vimc: propagate pixel format in the stream")

* Changes since v3
- Change minimum resolution of a vimc camera from 16x16 to 48x48 to 
  satisfy scaler requirement.
- Declare link variable where it's first used.
- Fold PipelineHandlerVimc::initLinks() into VimcCameraData::init().
- Mention test change in commit message in 2/4.
- Update comments.

* Changes since v2
- Switch to vimc RGB/YUV capture video node.

Niklas Söderlund (4):
  libcamera: pipeline: vimc: Initialize device pointers
  libcamera: pipeline: vimc: Switch to using the RGB/YUV Capture video
    node
  tests: v4l2_videodevice: Set media bus and pixel formats for vimc
  tests: camera-sensor: Test using invalid media bus format

 src/libcamera/pipeline/vimc.cpp               | 93 +++++++++++++++++--
 test/camera-sensor.cpp                        |  3 +-
 test/camera/buffer_import.cpp                 | 10 +-
 .../v4l2_videodevice_test.cpp                 | 26 ++++++
 test/v4l2_videodevice/v4l2_videodevice_test.h |  7 +-
 5 files changed, 123 insertions(+), 16 deletions(-)

-- 
2.22.0