SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The graphics pipeline input port is connected to the GFX FIFO, and to the four overlay managers or WB pipeline at its output. The pixel output is directed to an LCD, TV, or WB path by setting the DISPC_GFX_ATTRIBUTES[8] CHANNELOUT bit and the DISPC_GFX_ATTRIBUTES[31:30] CHANNELOUT2 bit field. Table 13-82 lists the bit field settings to orient a pipeline to an LCD, TV, or WB output. The default value directs the GFX pipeline to LCD1. The GFX pipeline can be enabled by setting the DISPC_GFX_ATTRIBUTES[0] ENABLE bit to 0x1.
It is not possible to change the direction of the GFX pipeline on the fly. If the graphics pipeline must be connected to an overlay manager different from the one to which it is currently connected, then the following steps must be performed:
The pipeline consists of a programmable replication logic and an antiflicker filter. The replication logic is used to convert the RGB pixel formats into an ARGB40-based format. The antiflicker filter processes the graphics data in RGB format to remove some of the vertical flicker.
The GFX pipeline does not include a scaler.
Table 13-66 lists the input formats supported by the graphics pipeline.
Figure 13-47 shows the graphics pipeline.