radv: Emit a BATCH_BREAK when changing pixel shaders.
Fixes a hang on Raven with Resident Evil 2.
I did not find anything more restricted to fix it:
- Setting persistent_states_per_bin to 1 fixes it too, but likely does an internal break on any descriptor set changes too.
- Only breaking the batch when cb_target_mask changes does not fix it (and looking at AMDVLK comments, I suspect the code in radeonsi should really be doing a FLUSH_DFSM).
- Always doing a FLUSH_DFSM on shader switch helps, but that is more often than this and I don't think we should be doing that when DFSM is disabled.
- Also emitting the existing break on framebuffer change when DFSM is disabled does not fix the issue.
Closes: #2315 (closed) CC: mesa-stable@lists.freedesktop.org