[Intel-gfx] [RFC 6/8] drm/i915: Lift the user PAT restriction from gpu_write_needs_clflush

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Now that i915 understands the caching modes behind PAT indices, and having
also special cased the Meteorlake snooping fully coherent mode, we can
remove the user PAT check from gpu_write_needs_clflush().

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Fei Yang <fei.yang@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_domain.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
index c15f83de33af..bf3a2fa0e539 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
@@ -41,12 +41,6 @@ static bool gpu_write_needs_clflush(struct drm_i915_gem_object *obj)
 	if (IS_METEORLAKE(i915))
 		return false;
 
-	/*
-	 * Always flush cache for UMD objects with PAT index set.
-	 */
-	if (obj->pat_set_by_user)
-		return true;
-
 	/*
 	 * Fully coherent cached access may end up with data in the CPU cache
 	 * which hasn't hit memory yet.
-- 
2.39.2