drm/msm/sde: dual pipe use case support

Add support for cases with two pipes, merged together via 3D mux
into one output display

Change-Id: Ic1e16af72e8cc45a8fd9ad706b37f5b69d30f0ef
Signed-off-by: Lloyd Atkinson <latkinso@codeaurora.org>
diff --git a/drivers/gpu/drm/msm/sde/sde_encoder_phys_wb.c b/drivers/gpu/drm/msm/sde/sde_encoder_phys_wb.c
index 32a25e4..665b044 100644
--- a/drivers/gpu/drm/msm/sde/sde_encoder_phys_wb.c
+++ b/drivers/gpu/drm/msm/sde/sde_encoder_phys_wb.c
@@ -278,6 +278,7 @@
 
 	intf_cfg->intf = SDE_NONE;
 	intf_cfg->wb = hw_wb->idx;
+	intf_cfg->mode_3d = sde_encoder_helper_get_3d_blend_mode(phys_enc);
 
 	if (phys_enc->hw_ctl && phys_enc->hw_ctl->ops.setup_intf_cfg)
 		phys_enc->hw_ctl->ops.setup_intf_cfg(phys_enc->hw_ctl,