# modetest --help
usage: modetest [-acDdefMPpsCvrw]

 Query options:
        -c      list connectors
        -e      list encoders
        -f      list framebuffers
        -p      list CRTCs and planes (pipes)

 Test options:
        -P <plane_id>@<crtc_id>:<w>x<h>[+<x>+<y>][*<scale>][@<format>]  set a plane
        -s <connector_id>[,<connector_id>][@<crtc_id>]:[#<mode index>]<mode>[-<vrefresh>][@<format>]    set a mode
        -C      test hw cursor
        -v      test vsynced page flipping
        -r      set the preferred mode for all connectors
        -w <obj_id>:<prop_name>:<value> set property
        -a      use atomic API
        -F pattern1,pattern2    specify fill patterns

 Generic options:
        -d      drop master after mode set
        -M module       use the given driver
        -D device       use the given device