[PATCH 1/2] drm/i915: fix TLB invalidation for Gen12.50 video and compute engines

[Tvrtko Ursulin]

From: Andrzej Hajda <andrzej.hajda at intel.com>

In case of Gen12.50 video and compute engines, TLB_INV registers are
masked - to modify one bit, corresponding bit in upper half of the register
must be enabled, otherwise nothing happens.

Fixes: 77fa9efc16a9 ("drm/i915/xehp: Create separate reg definitions for new MCR registers")
Signed-off-by: Andrzej Hajda <andrzej.hajda at intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 63f95c5f3614..7eeee5a7cb33 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -1100,9 +1100,15 @@ static void mmio_invalidate_full(struct intel_gt *gt)
 			continue;
 
 		if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50)) {
+			u32 val = BIT(engine->instance);
+
+			if (engine->class == VIDEO_DECODE_CLASS ||
+			    engine->class == VIDEO_ENHANCEMENT_CLASS ||
+			    engine->class == COMPUTE_CLASS)
+				val = _MASKED_BIT_ENABLE(val);
 			intel_gt_mcr_multicast_write_fw(gt,
 							xehp_regs[engine->class],
-							BIT(engine->instance));
+							val);
 		} else {
 			rb = get_reg_and_bit(engine, regs == gen8_regs, regs, num);
 			if (!i915_mmio_reg_offset(rb.reg))
-- 
2.34.1