[Intel-gfx] [PATCH] i915/gem: Force HW tracking to exit PSR

[Gaurav K Singh]

Instead of calling i915_gem_object_invalidate_frontbuffer(),
call i915_gem_object_flush_frontbuffer() which will eventually
call psr_force_hw_tracking_exit(). This will force HW tracking
to exit PSR instead of disabling and re-enabling.

On Gen9 Intel chromebooks, while playing around with Squid software,
after drawing line, line delay was observed.Also can see flash, garbage
and even shaking display sometimes.

With this fix, issues reported were resolved on Gen9 and Gen11 Intel
chromebooks.

Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_domain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
index 7f76fc68f498..fb1daddde286 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
@@ -553,7 +553,7 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
 	i915_gem_object_unlock(obj);
 
 	if (write_domain)
-		i915_gem_object_invalidate_frontbuffer(obj, ORIGIN_CPU);
+		i915_gem_object_flush_frontbuffer(obj, ORIGIN_DIRTYFB);
 
 out_unpin:
 	i915_gem_object_unpin_pages(obj);
-- 
2.27.0-rc2