SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
Since the compression/decompression is tile based, the DMA engine generates a 256-byte (16x128-bit) 1D burst request for each tile (a tile is a 16x4 or 32x2 2D structure of 32-bit elements) to FBDC which handles the DMA transfer and decompression of the requested tile. The de-compression phases are transparent to the DISPC hardware. Only ordering of the pixels from a returned tile is taken care by the DISPC DMA engine using 1D burst. The data returned from the FBDC, for a single tile over different OCP data-phases (DP), is as shown in Figure 12-317.
Due to the tile nature of the data, the following DMA features are not available with compressed data formats: