How to get name and current status of a DRM connector
来自百问网嵌入式Linux wiki
使用以下命令获取DRM连接器名称和关联状态：
Board $> for p in /sys/class/drm/*/status; do con=${p%/status}; echo -n "${con#*/card?-}: "; cat $p; done
结果示例：
DSI-1: connected HDMI-A-1: connected
使用以下命令获取DRM连接器名称和关联状态：
Board $> for p in /sys/class/drm/*/status; do con=${p%/status}; echo -n "${con#*/card?-}: "; cat $p; done
结果示例：
DSI-1: connected HDMI-A-1: connected