1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 85037b9d4934..5033c74966aa 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -866,8 +866,12 @@ static void intel_sdvo_get_mode_from_dtd(struct drm_display_mode * mode,
                 mode->flags |= DRM_MODE_FLAG_INTERLACE;
         if (dtd->part2.dtd_flags & DTD_FLAG_HSYNC_POSITIVE)
                 mode->flags |= DRM_MODE_FLAG_PHSYNC;
+        else
+                mode->flags |= DRM_MODE_FLAG_NHSYNC;
         if (dtd->part2.dtd_flags & DTD_FLAG_VSYNC_POSITIVE)
                 mode->flags |= DRM_MODE_FLAG_PVSYNC;
+        else
+                mode->flags |= DRM_MODE_FLAG_NVSYNC;
 }
 
 static bool intel_sdvo_check_supp_encode(struct intel_sdvo *intel_sdvo)