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Did DisplayPort support bonding signals like that? Or would it just show up as 2 separate monitors to the GPU?
by ThatPlayer 2y ago
Did DisplayPort support bonding signals like that? Or would it just show up as 2 separate monitors to the GPU?
- p_l 2y agoIt requires compatible GPUs, but it's how early 5k@60Hz displays were connected using DisplayPort 1.2, and how very large displays are connected in general. Among displays that used this was for example Dell UP2715K and early LG UltraFine 5k, but I heard that Apple's XDR display uses it as well to avoid utilizing DSC by setting up 2 DisplayPort 1.4 tunnels over TB3 and using tiled mode. The display device provides DisplayID block id 0x28 "Tiled Display Technology" with description of tiling, which is then used on GPU side to properly configure framebuffer -> DP sources mappings so that from userland you see one display. The DisplayID block also explicitly supports things like declaring bevels etc. if necessary.