commit 3e90ab3aefb0728201b88388bbcde7b53c6d723e
author Jonas Larsson <ljonas@google.com> Mon Oct 29 16:59:55 2018 -0700
committer Jonas Larsson <ljonas@google.com> Mon Oct 29 16:59:55 2018 -0700
tree 4fbd66cc0dd844d596baa5a89ce2b4eb145cac85
parent b2c850f295a0fe49310fb60784ac6af4a29bceae

Have GST_V4L2_IO_AUTO select GST_V4L2_IO_DMABUF.

Standard is for io-mode=auto to mean io-mode=mmap. dmabuf has
fast paths in kmssink, glupload and others.

This change is equivalent
gst-launch-1.0 v4l2src io-mode=dmabuf
without the need to set the property as the the default is auto
and auto is now dmabuf for capture.

Change-Id: I49fd4495a6e97287d9387e40ba05f0ed470ebde6

sys/v4l2/gstv4l2object.c

diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index 6124445..870e756 100644
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -2856,7 +2856,7 @@
 
   if (v4l2object->device_caps & V4L2_CAP_STREAMING) {
     if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
-      mode = GST_V4L2_IO_MMAP;
+      mode = GST_V4L2_IO_DMABUF;
   } else if (v4l2object->req_mode == GST_V4L2_IO_MMAP)
     goto method_not_supported;