Hello, On Mon, May 31, 2021 at 07:22:12PM +0100, Ian Arkver wrote: > On 31/05/2021 18:55, Fabio Estevam wrote: > > Hi, > > > > On an imx6dl based board with an ADV7280, I can successfully capture > > from an analog camera using the following Gstreamer pipeline: > > > > gst-launch-1.0 v4l2src device=/dev/video2 ! kmssink > > > > The next goal is to integrate it within the Qt multimedia application: > > https://github.com/qt/qtmultimedia/blob/5.15.2/src/gsttools/qgstutils.cpp#L631-L687 > > > > The Qt app uses the VIDIOC_ENUMINPUT and VIDIOC_S_INPUT ioctl's, but > > as these are not implemented by the imx-media-capture driver yet, it > > causes the camera to not be detected. I'd argue this should be fixed in Qt though :-) Those ioctls really don't make sense for the IPU driver. > Seems to me (naively, without looking into it in depth) that the v4l2 > framework default should be to enumerate a single input, return that > input with g_input and succeed in setting that input with s_input. This is done in commit f645e6256bd1b12523b759fcc610861fb21c24c7 Author: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx> Date: Tue Apr 21 15:57:38 2020 +0200 media: v4l2-dev/ioctl: Add V4L2_CAP_IO_MC but only when V4L2_CAP_IO_MC is set. > Maybe there's a reason why it doesn't? > > > Does anyone have any suggestions as to how to add support for > > .vidioc_enum_input, .vidioc_g_input and .vidioc_s_input in > > drivers/staging/media/imx/imx-media-capture.c ? > > > > I tried to look at how the other drivers implement these hooks, but my > > attempts to add support for them to the imx capture driver didn't > > work. -- Regards, Laurent Pinchart
