disp: msm: move from drm_mode to msm_mode

Move away from the private and private_flags fields from drm_mode,
as it is being deprecated in latest kernel version. Instead, Add
msm_display_mode as a wrapper to be used in downstream to store these
parameters. Also, store msm_mode in connector_state to be accessed
in commit path.

Change-Id: Ia5bdebe75f00aa15fb7db4dc3a0d50c30894a95c
Signed-off-by: Orion Brody <obrody@codeaurora.org>

msm/sde/sde_crtc.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2020 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015-2021 The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
  *
@@ -588,6 +588,13 @@ static inline int sde_crtc_request_frame_reset(struct drm_crtc *crtc)
  */
 int sde_crtc_vblank(struct drm_crtc *crtc, bool en);
 
+/**
+ * sde_crtc_get_msm_mode - get msm_mode for a given crtc state
+ * @c_state: Pointer to drm crtc state object
+ * Returns: msm_display_mode corresponding to this crtc state, or NULL if none
+ */
+struct msm_display_mode *sde_crtc_get_msm_mode(struct drm_crtc_state *c_state);
+
 /**
  * sde_crtc_commit_kickoff - trigger kickoff of the commit for this crtc
  * @crtc: Pointer to drm crtc object