[PATCH] drm/i915/xelpmp: Consider GSI offset when doing MCR lookups

[Matt Roper]

MCR range tables use the final MMIO offset of a register (including the
0x380000 GSI offset when applicable).  Since the i915_mcr_reg_t passed
as a parameter during steering lookup does not include the GSI offset,
we need to add it back in for GSI registers before searching the tables.

Fixes: a7ec65fc7e83 ("drm/i915/xelpmp: Add multicast steering for media GT")
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt_mcr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_mcr.c b/drivers/gpu/drm/i915/gt/intel_gt_mcr.c
index a4a8b8bc5737..03632df27de3 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_mcr.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_mcr.c
@@ -561,12 +561,15 @@ static bool reg_needs_read_steering(struct intel_gt *gt,
 				    i915_mcr_reg_t reg,
 				    enum intel_steering_type type)
 {
-	const u32 offset = i915_mmio_reg_offset(reg);
+	u32 offset = i915_mmio_reg_offset(reg);
 	const struct intel_mmio_range *entry;
 
 	if (likely(!gt->steering_table[type]))
 		return false;
 
+	if (IS_GSI_REG(offset))
+		offset += gt->uncore->gsi_offset;
+
 	for (entry = gt->steering_table[type]; entry->end; entry++) {
 		if (offset >= entry->start && offset <= entry->end)
 			return true;
-- 
2.39.1