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<p class="MsoNormal">Hi Experts:<o:p></o:p></p>
<p class="MsoNormal">v4l2src in (gst 1.2) supports dma_buf.<o:p></o:p></p>
<p class="MsoNormal">However, when I tried it on Ubuntu 13.10, it reports “: Failed EXPBUF: Inappropriate ioctl for device”.<o:p></o:p></p>
<p class="MsoNormal">Anyone knows which version of kernel support this feature?<o:p></o:p></p>
<p class="MsoNormal">Thanks.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Linux halley-has 3.11.0-13-generic #20-Ubuntu SMP Wed Oct 23 07:38:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux<o:p></o:p></p>
<p class="MsoNormal">halley@halley-has:~/b-ocl/beignet/build$ gst-launch-1.0 v4l2src io-mode=4 ! fakesink<o:p></o:p></p>
<p class="MsoNormal">Setting pipeline to PAUSED ...<o:p></o:p></p>
<p class="MsoNormal">Pipeline is live and does not need PREROLL ...<o:p></o:p></p>
<p class="MsoNormal">Setting pipeline to PLAYING ...<o:p></o:p></p>
<p class="MsoNormal">New clock: GstSystemClock<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040275368 21534 0xfa9230 WARN v4l2 gstv4l2bufferpool.c:331:gst_v4l2_buffer_pool_alloc_buffer: Failed EXPBUF: Inappropriate ioctl for device<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040315993 21534 0xfa9230 WARN bufferpool gstbufferpool.c:297:do_alloc_buffer:<v4l2bufferpool0> alloc function failed<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040325688 21534 0xfa9230 WARN bufferpool gstbufferpool.c:331:default_start:<v4l2bufferpool0> failed to allocate buffer<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040334329 21534 0xfa9230 ERROR v4l2 gstv4l2bufferpool.c:551:gst_v4l2_buffer_pool_start:<v4l2bufferpool0> failed to start streaming<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040342986 21534 0xfa9230 ERROR bufferpool gstbufferpool.c:491:gst_buffer_pool_set_active:<v4l2bufferpool0> start failed<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040351130 21534 0xfa9230 ERROR basesrc gstbasesrc.c:2922:gst_base_src_set_allocation:<v4l2src0> failed to activate bufferpool.<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040369099 21534 0xfa9230 WARN basesrc gstbasesrc.c:2865:gst_base_src_loop:<v4l2src0> error: Internal data flow error.<o:p></o:p></p>
<p class="MsoNormal">0:00:00.040380282 21534 0xfa9230 WARN basesrc gstbasesrc.c:2865:gst_base_src_loop:<v4l2src0> error: streaming task paused, reason not-negotiated (-4)<o:p></o:p></p>
<p class="MsoNormal">ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data flow error.<o:p></o:p></p>
<p class="MsoNormal">Additional debug info:<o:p></o:p></p>
<p class="MsoNormal">gstbasesrc.c(2865): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:<o:p></o:p></p>
<p class="MsoNormal">streaming task paused, reason not-negotiated (-4)<o:p></o:p></p>
<p class="MsoNormal">Execution ended after 0:00:00.027960315<o:p></o:p></p>
<p class="MsoNormal">Setting pipeline to PAUSED ...<o:p></o:p></p>
<p class="MsoNormal">Setting pipeline to READY ...<o:p></o:p></p>
<p class="MsoNormal">Setting pipeline to NULL ...<o:p></o:p></p>
<p class="MsoNormal">Freeing pipeline ...<o:p></o:p></p>
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