+
+4. (Optional) This is how to test and play multimedia contents with acceleration.
+
+ 1. Boot porter without mouse and keyboard, it avoid to boot weston automatically.
+ For now, when running weston, V4L2 deosn't work correctly, so we have to
+ stop weston first (GST plugin `waylandsink` also doesn't work correctly for now).
+
+ 2. Execute these instructions:
+ $ export LD_LIBRARY_PATH="/lib:/usr/lib:/usr/local/lib:"
+
+ # Set the mixer
+ $ amixer set "LINEOUT Mixer DACL" on
+ $ amixer set "DVC Out" 10
+
+ $ modprobe -a mmngr mmngrbuf s3ctl uvcs_cmn vspm fdpm
+
+ $ media-ctl -d /dev/media0 -r
+ $ media-ctl -d /dev/media0 -l '"vsp1.2 rpf.0":1 -> "vsp1.2 uds.0":0 [1]'
+ $ media-ctl -d /dev/media0 -l '"vsp1.2 uds.0":1 -> "vsp1.2 wpf.0":0 [1]'
+ $ media-ctl -d /dev/media0 -l '"vsp1.2 wpf.0":1 -> "vsp1.2 lif":0 [1]'
+ $ media-ctl -d /dev/media0 -V '"vsp1.2 rpf.0":0 [fmt:AYUV32/1920x1080]'
+ $ media-ctl -d /dev/media0 -V '"vsp1.2 rpf.0":1 [fmt:AYUV32/1920x1080]'
+ $ media-ctl -d /dev/media0 -V '"vsp1.2 uds.0":0 [fmt:AYUV32/1920x1080]'
+ $ media-ctl -d /dev/media0 -V '"vsp1.2 uds.0":1 [fmt:AYUV32/640x480]'
+ $ media-ctl -d /dev/media0 -V '"vsp1.2 wpf.0":0 [fmt:AYUV32/640x480]'
+ $ media-ctl -d /dev/media0 -V '"vsp1.2 wpf.0":1 [fmt:ARGB32/640x480]'
+ $ media-ctl -d /dev/media0 -V '"vsp1.2 lif":0 [fmt:ARGB32/640x480]'
+
+ # in caes R-Car M2 (HDMI - DU1 - vspd0)
+ $ modetest -M rcar-du -s 10@8:1280x720@AR24 -d -P '8@19:640x480+100+200@XR24' &
+
+ After these command, Test pattern will show on display connected to
+ porter's HDMI port.
+
+ Then, you can play H264(MP4) movie like these,
+ $ gst-launch-1.0 filesrc location=./sample.mp4 ! qtdemux name=d d. ! \
+ queue ! omxh264dec no-copy=true ! v4l2sink device=/dev/video1 \
+ io-mode=userptr d. ! queue ! faad ! alsasink device=hw:0,0