mirrors
/
weston
mirror of https://gitlab.freedesktop.org/wayland/weston.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

clients/dmabuf-v4l: explain vivid setup 

Add very short explanation on how to set up Vivid driver, when you don't
have suitable V4L2 device to use.

Using the XR24 (DRM_FORMAT_XRGB8888) format practically guarantees that
you can test direct scanout on a hardware overlay, too. At least on PC
hardware that has overlays. Tested to work on Intel.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
This commit is contained in:
Pekka Paalanen 2016-07-04 16:25:15 +03:00 committed by Quentin Glidic
parent 2eda27b7fb
commit dbb85d7173
No known key found for this signature in database
GPG Key ID: AC203F96E2C34BB7
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
clients/simple-dmabuf-v4l.c
View File

@ -896,6 +896,23 @@ usage(const char *argv0)
"The default for both formats is YUYV.\n" "The default for both formats is YUYV.\n"
"If the V4L2 and DRM formats differ, the data is simply " "If the V4L2 and DRM formats differ, the data is simply "
"reinterpreted rather than converted.\n", argv0); "reinterpreted rather than converted.\n", argv0);
printf("\n"
"How to set up Vivid the virtual video driver for testing:\n"
"- build your kernel with CONFIG_VIDEO_VIVID=m\n"
"- add this to a /etc/modprobe.d/ file:\n"
" options vivid node_types=0x1 num_inputs=1 input_types=0x00\n"
"- modprobe vivid and check which device was created,\n"
" here we assume /dev/video0\n"
"- set the pixel format:\n"
" $ v4l2-ctl -d /dev/video0 --set-fmt-video=width=640,pixelformat=XR24\n"
"- launch the demo:\n"
" $ %s /dev/video0 XR24 XR24\n"
"You should see a test pattern with color bars, and some text.\n"
"\n"
"More about vivid: https://www.kernel.org/doc/Documentation/video4linux/vivid.txt\n"
"\n", argv0);
exit(0); exit(0);
} }