[Intel-gfx] [PATCH] drm/i915: fix TLB invalidation for Gen12.50 video and compute engines

[Andrzej Hajda]

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>
---
Hi,

This patch was sent already to ML, but together with refactoring patch.
Since it contains fix and should be merged ASAP it is sent separately
to get CI test results.

Regards
Andrzej
---
 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 63f95c5f36146b..7eeee5a7cb33cb 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