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The Display Subsystem (DSS) provides the logic to display a video frame from the system memory frame buffer on a liquid-crystal display (LCD) panel or TV set. The display subsystem can display different pictures simultaneously by using three LCD outputs (LCD1, LCD2, and LCD3), in addition to a TV output. All three LCD outputs are available on three parallel interfaces (DPI1, DPI2, and DPI3), providing support for MIPI DPI 2.0, or BT-656 or BT-1120. The TV output is available on one of the following interfaces • High-Definition Multimedia Interface (HDMI) • DPI1 parallel interface The modules integrated in the display subsystem are: • Display controller (DISPC): – One direct memory access (DMA) engine – One graphics pipeline (GFX), three video (VID) pipelines, and one write-back (WB) pipeline – Three LCD outputs and one TV output, each with a dedicated overlay manager • HDMI protocol engine: – HDMI 1.4a support up to 1080p@60Hz (including 3D frame-packing support) – 36-bit RGB color – HDCP 1.4 key protection – Deep color mode support (10-bit/12-bit for 148.5-MHz pixel clock)
