[Intel-gfx] [PATCH] drm/i915: suppress automic commit error message under gvt-g env

[bing.niu at intel.com]

From: Bing Niu <bing.niu at intel.com>

under virtualization enviroment, it is possible guest update pipe
registers across vblank intervals due to delay of mmio trap or vm
schedule out. However, it is safe since those pipe update happen in
virual registers and will not commit to hardware. suppress that
automic commit error message under virtualization case to avoid
confuse user.

Signed-off-by: Bing Niu <bing.niu at intel.com>
---
 drivers/gpu/drm/i915/intel_sprite.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index b16a295..5ce1ec6 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -158,6 +158,7 @@ void intel_pipe_update_end(struct intel_crtc *crtc, struct intel_flip_work *work
 	int scanline_end = intel_get_crtc_scanline(crtc);
 	u32 end_vbl_count = intel_crtc_get_vblank_counter(crtc);
 	ktime_t end_vbl_time = ktime_get();
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 
 	if (work) {
 		work->flip_queued_vblank = end_vbl_count;
@@ -184,7 +185,7 @@ void intel_pipe_update_end(struct intel_crtc *crtc, struct intel_flip_work *work
 	local_irq_enable();
 
 	if (crtc->debug.start_vbl_count &&
-	    crtc->debug.start_vbl_count != end_vbl_count) {
+	    crtc->debug.start_vbl_count != end_vbl_count && !intel_vgpu_active(dev_priv)) {
 		DRM_ERROR("Atomic update failure on pipe %c (start=%u end=%u) time %lld us, min %d, max %d, scanline start %d, end %d\n",
 			  pipe_name(pipe), crtc->debug.start_vbl_count,
 			  end_vbl_count,
-- 
2.7.4