1 通过help有哪些参数

130|:/ # modetest -h
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 patternsGeneric options:-d      drop master after mode set-M module       use the given driver-D device       use the given deviceDefault is to dump all info.

2 分3大类

2.1 查询

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

2.2 测试

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

2.3 通用设置

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

3 常用命令（RK平台）

• Query options 查询选项其实可以不用关心，执行modetest就会全部打印出来，保存文件再去找对应需要的内容即可，重点在测试与通用设置

3.1 修改Connectors id 为445的属性brightness为30

// -w <obj_id>:<prop_name>:<value> set property
modetest -M rockchip -w 445:brightness:30

3.2 Connectors id 为445的屏幕为彩条模式（800x1280）

// -s <connector_id>[,<connector_id>][@<crtc_id>]:[#<mode index>]<mode>[-<vrefresh>][@<format>]
// 直接设置分辨率
modetest -M rockchip -s 445:800x1280
//设置分辨率和刷新率
modetest -M rockchip -s 445:800x1280-60.08
// 通过#查找第0个mode
modetest -M rockchip -s 445:#0

3.3 查询

modetest -M rockchip