From this CI warning log, there are all known warning message in i915 driver and is not caused by my patch.

Warning 1:
<3> [69.081809] [drm:wa_verify [i915]] *ERROR* engine workaround lost on application! (reg[b004]=0x0, relevant bits were 0x0 vs expected 0x80)
Warning 2:
<3> [619.188270] i915/intel_lrc_live_selftests: live_lrc_isolation failed with error -22
Warning 3:
<3> [282.248111] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun