Debuging tw9900 report error:ERROR:v4l2 capture:width or height too small

tangyuan — Tue, 15 Mar 2016 02:07:33 GMT

I am debuging the tw9900 on linux 3.0.35 platform.Tw9900 is a video decoder.I modified the tw9900 accroding to the adv7180.I am using the mxc_v4l2_tvin.c to test the tw9900.c.It was reporting the error as follows in kernel on mxc_v4l2_capture.c:

ERROR:v4l2 captue:width or height too small

In mxc_v4l2_tvin.c,when I run ioctl(fd_capture_v4l,VIDIOC_S_FMT,&fmt),it was reported ERROR in APP:iformat not supported,and in kernel driver:it was reported error:ERROR:v4l2 capture wigth or height too small

Attachment is my driver and test application

Can you anyone help me?Why i run VIDIOC_S_FMT,it was reported ERROR:v4l2 capture wigth or height too small

Original Attachment has been moved to: mxc_v4l2_tvin.c.zip

Original Attachment has been moved to: tw9900.c.zip

Re: Debuging tw9900 report error:ERROR:v4l2 capture:width or height too small

igorpadykov — Tue, 15 Mar 2016 07:52:57 GMT

Hi tang

some chips like TVP5158, TW2866 use non-standard BT.656 format,

so it makes sense to check tw9900 format and compare what is supports

i.MX6 IPU in sect.37.4.3.6 Timing/Data mode protocols. Also one can look

at tvp bring-up efforts:

i.MX53 IPU Deinterlacer

Best regards

igor

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topic Debuging tw9900 report error:ERROR:v4l2 capture:width or height too small in i.MX Processors

Debuging tw9900 report error:ERROR:v4l2 capture:width or height too small

Re: Debuging tw9900 report error:ERROR:v4l2 capture:width or height too small