Gstreamer v4l2: Device does support non-contiguous planes error with NV16

[Andrea]

Hi,
I'm modifing a v4l2 driver to make it working with multi-plane format
(NV16), I've implemented the mplane ioctl, but when the gstreamer pipeline
starts I get this error: 

/DEBUG                   v4l2
gstv4l2object.c:3223:gst_v4l2_object_set_format_full:<v4l2src0> progressive
video
DEBUG                   v4l2
gstv4l2object.c:3355:gst_v4l2_object_set_format_full:<v4l2src0> Desired
format 4096x2160, format NV16 stride: 4096
DEBUG                   v4l2
gstv4l2object.c:3406:gst_v4l2_object_set_format_full:<v4l2src0> Desired
format is 4096x2160, format NV16, nb planes 1
DEBUG                   v4l2
gstv4l2object.c:3412:gst_v4l2_object_set_format_full:<v4l2src0>   stride
4096
DEBUG                   v4l2
gstv4l2object.c:3449:gst_v4l2_object_set_format_full:<v4l2src0> Got format
of 4096x2160, format NV16, nb planes 2, colorspace 8
DEBUG                   v4l2
gstv4l2object.c:3456:gst_v4l2_object_set_format_full:<v4l2src0>   stride
4096, sizeimage 8847360
DEBUG                   v4l2
gstv4l2object.c:3456:gst_v4l2_object_set_format_full:<v4l2src0>   stride
4096, sizeimage 8847360
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Device
'/dev/video0' does support non-contiguous planes
Additional debug info:
../../../git/sys/v4l2/gstv4l2object.c(3678): gst_v4l2_object_set_format_full
(): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
Device wants 2 planes/

NV16 is made up of two planes so in the driver I put
v4l2_format.fmt.pix_mp.num_planes to 2. I don't understand why gstreamer
request only one plane for the format NV16.




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