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ERROR: v4l2 capture: slave not found!

Question asked by Cheng Chao on Jan 8, 2019
Latest reply on Jan 28, 2019 by Cheng Chao


   i am using a imx6dl sabresed board,my linux version is 3.4.52,and the file system version is fsl-image-qt5-fb-imx6qdlsolo,my camera is ov5642;

   i use the test program mxc_v4l2_overlay.c from "imx-test-5.3" to test the camera,it works,and the lvds screen get the real time image captured;

   my UI interface is designed with the Qt,so i need to control the camera by the Qt progrom;

   Naturally,i try to use the QCamera class from Qt,but when i run my Qt App,i got the error messege "ERROR: v4l2 capture: slave not found!",the messege is printed from the driver file "drivers/media/platform/mxc/capture/mxc_v4l2_capture.c",but i don't know how to solve the problem,do you know why,if so,please just tell me;