[Intel-gfx] [PATCH v4 3/3] drm/i915/gt: Skip TLB invalidation if the engine is not awake

[Andi Shyti <andi.shyti@linux.intel.com>]

We want to check if the engine is awake first before invalidating
its cache.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 034182f85501b..a1dc9f4203c2b 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -12,6 +12,7 @@
 #include "i915_drv.h"
 #include "intel_context.h"
 #include "intel_engine_regs.h"
+#include "intel_engine_pm.h"
 #include "intel_gt.h"
 #include "intel_gt_buffer_pool.h"
 #include "intel_gt_clock_utils.h"
@@ -1219,6 +1220,9 @@ void intel_gt_invalidate_tlbs(struct intel_gt *gt)
 		const unsigned int timeout_ms = 4;
 		struct reg_and_bit rb;
 
+		if (!intel_engine_pm_is_awake(engine))
+			continue;
+
 		rb = get_reg_and_bit(engine, regs == gen8_regs, regs, num);
 		if (!i915_mmio_reg_offset(rb.reg))
 			continue;
-- 
2.36.1