Hopefully this answers some questions. Other parameters that affect tiling layouts are GB_ADDR_CONFIG (all chips) and MC_ARB_RAMCFG (GFX6-8 only), and those vary with each chip. Some 32bpp 1D tiling layouts are compatible across all chips (1D display tiling is the same as SW_256B_D if Bpp == 4). On GFX9, swizzle modes <= 11 are the same on all GFX9 chips. The remaining modes depend on GB_ADDR_CONFIG and are also more efficient. Bpp, number of samples, and resource type (2D/3D) affect the layout too, e.g. 3D textures silently use thick tiling on GFX9. Harvesting doesn't affect tiling layouts. The layout changes between layers/slices a little. Always use the base address of the whole image when programming the hardware. Don't assume that the 2nd layer has the same layout. > + * TODO: Can scanout really not support fastclear data? It can, but only those encoded in the DCC buffer (0/1). There is no DAL support for DCC though. > + * TODO: Do some generations share DCC format? DCC mirrors the tiling layout, so the same tiling mode means the same DCC. Take the absolute pixel address, shift it to the right, and you'll get the DCC element address. I would generally consider DCC as non-shareable because of different meanings of TILING_INDEX between chips except maybe for common GFX9 layouts. > [comments about number of bits] We could certainly represent all formats as a list of enums, but then we would need to convert the enums to the full description in drivers. GFX6-8 can use TILING_INDEX (except for stencil, let's ignore stencil). The tiling tables shouldn't change anymore because they are optimized for the hardware, and later hw doesn't have any tables. Marek
