From 30da65d24b2bd6b20cbccaec9a7e832158c949df Mon Sep 17 00:00:00 2001
From: Matt Roper <matthew.d.roper@intel.com>
Date: Fri, 17 Sep 2021 09:12:03 -0700
Subject: drm/i915: Check SFC fusing before recording/dumping SFC_DONE
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Git-commit: 45f63790e456455be6a69630042611083effe09b
Patch-mainline: v5.16-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

On Xe_HP and beyond the SFC unit may be fused off, even if the
corresponding media engines are present.  Check the SFC-specific fusing
before trying to dump the SFC_DONE instances.

Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210917161203.812251-3-matthew.d.roper@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/i915_gpu_error.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index b9f66dbd46bb..2a2d7643b551 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -753,7 +753,8 @@ static void err_print_gt(struct drm_i915_error_state_buf *m,
 			 * only exists if the corresponding VCS engine is
 			 * present.
 			 */
-			if (!HAS_ENGINE(gt->_gt, _VCS(i * 2)))
+			if ((gt->_gt->info.sfc_mask & BIT(i)) == 0 ||
+			    !HAS_ENGINE(gt->_gt, _VCS(i * 2)))
 				continue;
 
 			err_printf(m, "  SFC_DONE[%d]: 0x%08x\n", i,
@@ -1632,7 +1633,8 @@ static void gt_record_regs(struct intel_gt_coredump *gt)
 			 * only exists if the corresponding VCS engine is
 			 * present.
 			 */
-			if (!HAS_ENGINE(gt->_gt, _VCS(i * 2)))
+			if ((gt->_gt->info.sfc_mask & BIT(i)) == 0 ||
+			    !HAS_ENGINE(gt->_gt, _VCS(i * 2)))
 				continue;
 
 			gt->sfc_done[i] =
-- 
2.38.1