[Intel-gfx] [PATCH 22/25] drm/i915: Flush caches for scanout during cpu->gtt move

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Flush the caches when moving a scanout buffer from CPU to GTT domain.
This allows us to move a scanout buffer to CPU write domain, do some
writes, and move it back to the GTT read domain. The display will then
see the correct data. In addition we still need to do the dirtyfb
ioctl to nuke FBC if that's enabled.

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a5e62cb..0ce66da 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3613,7 +3613,7 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
 		return ret;
 
 	i915_gem_object_retire(obj);
-	i915_gem_object_flush_cpu_write_domain(obj, false);
+	i915_gem_object_flush_cpu_write_domain(obj, obj->pin_display);
 
 	/* Serialise direct access to this object with the barriers for
 	 * coherent writes from the GPU, by effectively invalidating the
-- 
1.8.5.5