Hi Tim, Jacopo, I have now finished writing the v4l2-compliance tests for the various v4l-subdev ioctls. I managed to test some with the vimc driver, but that doesn't implement all ioctls, so I could use some help testing my test code :-)
To test you first need to apply these patches to your kernel: https://patchwork.linuxtv.org/patch/46817/ https://patchwork.linuxtv.org/patch/46822/ Otherwise the compliance test will fail a lot. Now run v4l2-compliance -u /dev/v4l-subdevX (or -uX as a shortcut) and see what happens. I have tested the following ioctls with vimc, so they are likely to be correct: #define VIDIOC_SUBDEV_G_FMT _IOWR('V', 4, struct v4l2_subdev_format) #define VIDIOC_SUBDEV_S_FMT _IOWR('V', 5, struct v4l2_subdev_format) #define VIDIOC_SUBDEV_ENUM_MBUS_CODE _IOWR('V', 2, struct v4l2_subdev_mbus_code_enum) #define VIDIOC_SUBDEV_ENUM_FRAME_SIZE _IOWR('V', 74, struct v4l2_subdev_frame_size_enum) All others are untested: #define VIDIOC_SUBDEV_G_FRAME_INTERVAL _IOWR('V', 21, struct v4l2_subdev_frame_interval) #define VIDIOC_SUBDEV_S_FRAME_INTERVAL _IOWR('V', 22, struct v4l2_subdev_frame_interval) #define VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL _IOWR('V', 75, struct v4l2_subdev_frame_interval_enum) #define VIDIOC_SUBDEV_G_CROP _IOWR('V', 59, struct v4l2_subdev_crop) #define VIDIOC_SUBDEV_S_CROP _IOWR('V', 60, struct v4l2_subdev_crop) #define VIDIOC_SUBDEV_G_SELECTION _IOWR('V', 61, struct v4l2_subdev_selection) #define VIDIOC_SUBDEV_S_SELECTION _IOWR('V', 62, struct v4l2_subdev_selection) #define VIDIOC_SUBDEV_G_EDID _IOWR('V', 40, struct v4l2_edid) #define VIDIOC_SUBDEV_S_EDID _IOWR('V', 41, struct v4l2_edid) #define VIDIOC_SUBDEV_S_DV_TIMINGS _IOWR('V', 87, struct v4l2_dv_timings) #define VIDIOC_SUBDEV_G_DV_TIMINGS _IOWR('V', 88, struct v4l2_dv_timings) #define VIDIOC_SUBDEV_ENUM_DV_TIMINGS _IOWR('V', 98, struct v4l2_enum_dv_timings) #define VIDIOC_SUBDEV_QUERY_DV_TIMINGS _IOR('V', 99, struct v4l2_dv_timings) #define VIDIOC_SUBDEV_DV_TIMINGS_CAP _IOWR('V', 100, struct v4l2_dv_timings_cap) I did the best I could, but there may very well be bugs in the test code. I will also test the timings and edid ioctls myself later next week at work. The v4l2-compliance utility can now also test media devices (-m option), although that's early days yet. Eventually I want to be able to walk the graph and test each device in turn. I have this idea of making v4l2-compliance, cec-compliance and media-compliance frontends that can all share the actual test code. And perhaps that can include a new dvb-compliance as well. However, that's future music, for now I just want to get proper ioctl test coverage so driver authors can at least have some confidence in their code by running these tests. Regards, Hans
