drm/msm/dsi-staging: add support for command mode panels

Add support for command mode panels. Command engine state must be
ref-counted since it is toggled in two paths, command transfer and mdp
command frame updates.

Change-Id: I9aba97465ad822c4c862f6aa5422dc47cb6664c8
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>
diff --git a/drivers/gpu/drm/msm/dsi-staging/dsi_catalog.c b/drivers/gpu/drm/msm/dsi-staging/dsi_catalog.c
index 114998f..3f698cb 100644
--- a/drivers/gpu/drm/msm/dsi-staging/dsi_catalog.c
+++ b/drivers/gpu/drm/msm/dsi-staging/dsi_catalog.c
@@ -28,6 +28,7 @@
 	ctrl->ops.video_engine_setup     = dsi_ctrl_hw_14_video_engine_setup;
 	ctrl->ops.set_video_timing       = dsi_ctrl_hw_14_set_video_timing;
 	ctrl->ops.cmd_engine_setup       = dsi_ctrl_hw_14_cmd_engine_setup;
+	ctrl->ops.setup_cmd_stream       = dsi_ctrl_hw_14_setup_cmd_stream;
 	ctrl->ops.ctrl_en                = dsi_ctrl_hw_14_ctrl_en;
 	ctrl->ops.cmd_engine_en          = dsi_ctrl_hw_14_cmd_engine_en;
 	ctrl->ops.phy_sw_reset           = dsi_ctrl_hw_14_phy_sw_reset;