KMS tests - dmesg-warn/dmesg-fail - *ERROR* Fault errors on pipe .*: 0x00000080

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_511/fi-skl-guc/igt@kms_plane_scaling@pipe-c-scaler-with-rotation.html#dmesg-warnings341

7> [27.507630] [drm:drm_mode_addfb2] [FB:129]
<7> [27.509052] i915 0000:00:02.0: [drm:skl_update_scaler [i915]] scaler_user index 2.6: staged scaling request for 8x8->1920x1200 scaler_users = 0x40
<7> [27.509118] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C] ddb (   0 -    0) -> (   0 -  860), size    0 ->  860
<7> [27.509148] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]   level  wm0, wm1, wm2, wm3, wm4, wm5, wm6, wm7, twm, swm -> *wm0,*wm1,*wm2,*wm3,*wm4,*wm5,*wm6,*wm7, twm, swm
<7> [27.509185] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]   lines    0,   0,   0,   0,   0,   0,   0,   0,   0,   0 ->    0,  16,  16,  16,  16,  16,  16,  16,   0,   0
<7> [27.509221] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]  blocks    0,   0,   0,   0,   0,   0,   0,   0,   0,   0 ->    2,   3,   3,   3,   3,   3,   3,   3,   0,   0
<7> [27.509246] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C] min_ddb    0,   0,   0,   0,   0,   0,   0,   0,   0,   0 ->    3,   4,   4,   4,   4,   4,   4,   4,   0,   0
<7> [27.509296] i915 0000:00:02.0: [drm:intel_atomic_setup_scalers [i915]] Attached scaler id 2.0 to PLANE:73
<3> [27.524049] i915 0000:00:02.0: [drm] *ERROR* Fault errors on pipe C: 0x00000080
<3> [27.524077] i915 0000:00:02.0: [drm] *ERROR* Fault errors on pipe C: 0x00000080
<3> [27.524081] DMAR: DRHD: handling fault status reg 3
<3> [27.524130] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 0 [fault reason 06] PTE Read access is not set
<7> [27.524354] i915 0000:00:02.0: [drm:i915_fifo_underrun_reset_write [i915]] Re-arming FIFO underruns on pipe C
<7> [27.524544] i915 0000:00:02.0: [drm:skl_update_scaler [i915]] scaler_user index 2.6: Staged freeing scaler id 0 scaler_users = 0x0
<7> [27.524585] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C] ddb (   0 -  860) -> (   0 -    0), size  860 ->    0
<7> [27.524609] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]   level *wm0,*wm1,*wm2,*wm3,*wm4,*wm5,*wm6,*wm7, twm, swm ->  wm0, wm1, wm2, wm3, wm4, wm5, wm6, wm7, twm, swm
<7> [27.524632] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]   lines    0,  16,  16,  16,  16,  16,  16,  16,   0,   0 ->    0,   0,   0,   0,   0,   0,   0,   0,   0,   0
<7> [27.524654] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]  blocks    2,   3,   3,   3,   3,   3,   3,   3,   0,   0 ->    0,   0,   0,   0,   0,   0,   0,   0,   0,   0
<7> [27.524676] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C] min_ddb    3,   4,   4,   4,   4,   4,   4,   4,   0,   0 ->    0,   0,   0,   0,   0,   0,   0,   0,   0,   0
<7> [27.541029] [drm:drm_mode_addfb2] [FB:130]
<7> [27.542506] i915 0000:00:02.0: [drm:skl_update_scaler [i915]] scaler_user index 2.6: staged scaling request for 8x8->1920x1200 scaler_users = 0x40
<7> [27.542549] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C] ddb (   0 -    0) -> (   0 -  860), size    0 ->  860
<7> [27.542572] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]   level  wm0, wm1, wm2, wm3, wm4, wm5, wm6, wm7, twm, swm -> *wm0,*wm1,*wm2,*wm3,*wm4,*wm5,*wm6,*wm7, twm, swm
<7> [27.542595] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]   lines    0,   0,   0,   0,   0,   0,   0,   0,   0,   0 ->    0,  16,  16,  16,  16,  16,  16,  16,   0,   0
<7> [27.542617] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C]  blocks    0,   0,   0,   0,   0,   0,   0,   0,   0,   0 ->    2,   3,   3,   3,   3,   3,   3,   3,   0,   0
<7> [27.542639] i915 0000:00:02.0: [drm:skl_compute_wm [i915]] [PLANE:73:plane 1C] min_ddb    0,   0,   0,   0,   0,   0,   0,   0,   0,   0 ->    3,   4,   4,   4,   4,   4,   4,   4,   0,   0
<7> [27.542686] i915 0000:00:02.0: [drm:intel_atomic_setup_scalers [i915]] Attached scaler id 2.0 to PLANE:73
<3> [27.557393] i915 0000:00:02.0: [drm] *ERROR* Fault errors on pipe C: 0x00000080
<3> [27.557413] DMAR: DRHD: handling fault status reg 3
<3> [27.557424] i915 0000:00:02.0: [drm] *ERROR* Fault errors on pipe C: 0x00000080