DRM全解析 —— encoder详解（2）

接前一篇文章：DRM全解析 —— encoder详解（1）

本文继续对DRM中encoder的核心结构struct drm_encoder的成员进行释义。

3. drm_encoder结构释义

（5）int encoder_type

    /**
	 * @encoder_type:
	 *
	 * One of the DRM_MODE_ENCODER_ types in drm_mode.h. The following
	 * encoder types are defined thus far:
	 *
	 * - DRM_MODE_ENCODER_DAC for VGA and analog on DVI-I/DVI-A.
	 *
	 * - DRM_MODE_ENCODER_TMDS for DVI, HDMI and (embedded) DisplayPort.
	 *
	 * - DRM_MODE_ENCODER_LVDS for display panels, or in general any panel
	 *   with a proprietary parallel connector.
	 *
	 * - DRM_MODE_ENCODER_TVDAC for TV output (Composite, S-Video,
	 *   Component, SCART).
	 *
	 * - DRM_MODE_ENCODER_VIRTUAL for virtual machine displays
	 *
	 * - DRM_MODE_ENCODER_DSI for panels connected using the DSI seria