In iris_resource_from_handle(), when a Wayland client created an I915_FORMAT_MOD_Y_TILED_CCS buffer, whandle->modifier and res->bo->tiling_mode end up desynchronised, the first one being Y-tiled, the second linear, leading to the assert on line 967 to crash Weston.
I haven’t been able to figure out where this bo gets created without the proper tiling mode though, but the resource doesn’t have the CCS aux bo either.
A I915_FORMAT_MOD_Y_TILED buffer works, as does a linear one.
Running latest ArchLinux, Mesa f83f9d7daa (master), Weston master, testing with Dolphin on this PR: https://github.com/dolphin-emu/dolphin/pull/7452
Hi Link, it would be helpful to have a reproducer for this issue, to have possibility to debug/investigate it
Hi Denis, my testcase is:
- Have Iris master built without NDEBUG, installed, and used by default on UHD 620.
- Start `weston` from TTY.
- Start any Dolphin game, or Firefox nightly with WebRender, or PyTouhou, or any other Wayland client using Y_TILED_CCS.
- See Weston crash there.