Messages in this thread | | | Subject | Re: i.MX6 MIPI-CSI2 OV5640 Camera testing on Mainline Linux | From | Steve Longerbeam <> | Date | Tue, 23 Oct 2018 11:11:54 -0700 |
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On 10/23/18 10:54 AM, Adam Ford wrote: > On Tue, Oct 23, 2018 at 12:39 PM Steve Longerbeam > <steve_longerbeam@mentor.com> wrote: >> >> On 10/23/18 10:34 AM, Adam Ford wrote: >>> On Tue, Oct 23, 2018 at 11:36 AM Steve Longerbeam >>> <steve_longerbeam@mentor.com> wrote: >>>> Hi Adam, >>>> >>>> On 10/23/18 8:19 AM, Adam Ford wrote: >>>>> On Mon, Oct 22, 2018 at 7:40 AM Fabio Estevam <festevam@gmail.com> wrote: >>>>>> Hi Adam, >>>>>> >>>>>> On Mon, Oct 22, 2018 at 9:37 AM Adam Ford <aford173@gmail.com> wrote: >>>>>> >>>>>>> Thank you! This tutorial web site is exactly what I need. The >>>>>>> documentation page in Linux touched on the media-ctl links, but it >>>>>>> didn't explain the syntax or the mapping. This graphical >>>>>>> interpretation really helps it make more sense. >>>>>> Is capturing working well on your i.MX6 board now? >>>>> Fabio, >>>>> >>>>> Unfortunately, no. I built the rootfs based on Jagan's instructions >>>>> at https://openedev.amarulasolutions.com/display/ODWIKI/i.CoreM6+1.5 >>>>> >>>>> I tried building both the 4.15-RC6 kernel, a 4.19 kernel and a 4.14 LTS kernel. >>>>> >>>>> Using the suggested method of generating the graphical display of the >>>>> pipeline options, I am able to enable various pipeline options >>>>> connecting different /dev/videoX options tot he camera. I have tried >>>>> both the suggested method above as well as the instructions found in >>>>> Documentation/media/v4l-drivers/imx.rst for their respective kernels, >>>>> and I have tried multiple options to capture through >>>>> ipu1_csi1_capture, ipu2_csi1_capture, and ip1_ic_prepenc capture, and >>>>> all yield a broken pipe. >>>>> >>>>> libv4l2: error turning on stream: Broken pipe >>>>> ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Could >>>>> not read from resource. >>>>> Additional debug info: >>>>> gstv4l2bufferpool.c(1064): gst_v4l2_buffer_pool_poll (): >>>>> /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: >>>>> poll error 1: Broken pipe (32) >>>>> >>>>> I can hear the camera click when I start gstreamer and click again >>>>> when it stops trying to stream. >>>>> >>>>> dmesg indicates a broken pipe as well.. >>>>> >>>>> [ 2419.851502] ipu2_csi1: pipeline start failed with -32 >>>>> >>>>> might you have any suggestions? >>>> This -EPIPE error might mean you have a mis-match of resolution, pixel >>>> format, or field type between one of the source->sink pad links. You can >>>> find out which pads have a mis-match by enabling dynamic debug in the >>>> kernel function __media_pipeline_start. >>> Following Jagan's suggestion, I tried to make sure all the resolution >>> and pixel formats were set the same between each source and sink. >>> >>> media-ctl --set-v4l2 "'ov5640 2-0010':0[fmt:UYVY2X8/640x480 >>> field:none]" >>> media-ctl --set-v4l2 "'imx6-mipi-csi2':1[fmt:UYVY2X8/640x480 >>> field:none]" >>> media-ctl --set-v4l2 "'ipu1_csi0_mux':2[fmt:UYVY2X8/640x480 >>> field:none]" >>> media-ctl --set-v4l2 "'ipu1_csi0':2[fmt:AYUV32/640x480 field:none]" >>> >>>> Also make sure you are attempting to stream from the correct /dev/videoN. >>> I have graphically plotted the pipeline using media-ctl --print-dot >>> and I can see the proper video is routed, but your dynamic debug >>> suggestion yielded something: >>> >>> imx-media capture-subsystem: link validation failed for 'ov5640 >>> 2-0010':0 -> 'imx6-mipi-csi2':0, error -32 >> >> It's what I expected, you have a format mismatch between those pads. > Is the mismatch something I am doing wrong with: > > media-ctl --set-v4l2 "'ov5640 2-0010':0[fmt:UYVY2X8/640x480 field:none]" > media-ctl --set-v4l2 "'imx6-mipi-csi2':2[fmt:UYVY2X8/640x480 field:none]" > > or is there something else I need to do? I just used Jagan's suggestion.
Yeah, that looks correct, media-ctl _should_ automatically propagate the format at 'ov5640 2-0010':0 to 'imx6-mipi-csi2':0. What version of media-ctl are you using? If you have an older version of media-ctl tool that doesn't propagate formats from source->sink pads, you'll have to explicitly set the format at 'imx6-mipi-csi2':0, and at all the other sink pads in your pipeline. Better yet, upgrade! :)
Steve
> >>> I am assume this means the interface between the camera and the csi2 >>> isn't working. I am going to double check the power rails and the >>> clocks. i can hear it click when activated and deactivated, so >>> something is happening. >>> >>> adam >>> >>>> Steve >>>>
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