Hi, I am running 5.10.0-rc5-next-20201125 (same behavior is seen on 5.4.76) on a imx6dl board with an ADV7280: # media-ctl -l "'adv7180 0-0020':0 -> 'ipu1_csi1_mux':4[1]"; # media-ctl -l "'ipu1_csi1_mux':5 -> 'ipu1_csi1':0[1]" # media-ctl -l "'ipu1_csi1':2 -> 'ipu1_csi1 capture':0[1]" # media-ctl -V "'adv7180 0-0020':0 [fmt:UYVY2X8/720x480 field:seq-bt]" # media-ctl -V "'ipu1_csi1_mux':5 [fmt:UYVY2X8/720x480]" # media-ctl -V "'ipu1_csi1':2 [fmt:AYUV32/720x480]" # v4l2-ctl -d3 --set-fmt-video=field=interlaced_bt Then I start the stream: v4l2-ctl --stream-mmap -d /dev/video3 [ 22.792049] ipu1_csi1: EOF timeout VIDIOC_DQBUF: failed: Input/output error It always fails for the first time. Then I try to start the stream once again: # v4l2-ctl --stream-mmap -d /dev/video3 [ 28.430420] ipu1_csi1: NFB4EOF <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.75 fps <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.77 fps <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.78 fps <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.77 fps <<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.78 fps <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.77 fps .... Does anyone have an idea as to why it fails when trying to stream for the first time? Next, I would like to run the following Gstreamer pipeline (GStreamer 1.18.1): # gst-launch-1.0 v4l2src device=/dev/video3 ! kmssink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstSystemClock ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Device '/dev/video3' does not support progressive interlacing Additional debug info: ../sys/v4l2/gstv4l2object.c(4012): gst_v4l2_object_set_format_full (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Device wants interleaved interlacing Execution ended after 0:00:00.014920000 Setting pipeline to NULL ... ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data stream error. Additional debug info: ../libs/gst/base/gstbasesrc.c(3127): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: streaming stopped, reason not-negotiated (-4) Freeing pipeline ... Any ideas on how to display the video captured to the display? Thanks, Fabio Estevam
