disp: msm: sde: modify check for active datapaths

In some cases like suspend and cwb concurrencies,
the number of mixers in the sde_crtc structure
can become zero. Add support to get the number
of mixers from topology in those cases to
avoid incorrect resource allocation request.

Change-Id: Id9b82e805ff50a107ad06514b4e41c0917abdf33
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>

msm/sde/sde_crtc.h

@@ -502,17 +502,6 @@ static inline int sde_crtc_get_mixer_height(struct sde_crtc *sde_crtc,
 			cstate->ds_cfg[0].lm_height : mode->vdisplay);
 }
 
-/**
- * sde_crtc_get_num_datapath - get the number of datapath active
- * @crtc: Pointer to drm crtc object
- */
-static inline int sde_crtc_get_num_datapath(struct drm_crtc *crtc)
-{
-	struct sde_crtc *sde_crtc = to_sde_crtc(crtc);
-
-	return sde_crtc ? sde_crtc->num_mixers : 0;
-}
-
 /**
  * sde_crtc_frame_pending - retun the number of pending frames
  * @crtc: Pointer to drm crtc object
@@ -892,4 +881,13 @@ void sde_crtc_static_img_control(struct drm_crtc *crtc,
  */
 void sde_crtc_static_cache_read_kickoff(struct drm_crtc *crtc);
 
+/**
+ * sde_crtc_get_num_datapath - get the number of datapath active
+ *				of primary connector
+ * @crtc: Pointer to DRM crtc object
+ * @connector: Pointer to DRM connector object of WB in CWB case
+ */
+int sde_crtc_get_num_datapath(struct drm_crtc *crtc,
+		struct drm_connector *connector);
+
 #endif /* _SDE_CRTC_H_ */