disp: msm: sde: track available hw resources

Track available hw resources using a common data structure in
the sde_rm object and pass available hw resource info to
interface drivers to make informed decisions in preparing
or filtering display modes.

Change-Id: I05649623233b0f531582e8c90d1ef92c7fceded4
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>

msm/sde/sde_rm.h

@@ -101,6 +101,7 @@ struct sde_rm_topology_def {
  * @lm_max_width: cached layer mixer maximum width
  * @rsvp_next_seq: sequence number for next reservation for debugging purposes
  * @rm_lock: resource manager mutex
+ * @avail_res: Pointer with curr available resources
  */
 struct sde_rm {
 	struct drm_device *dev;
@@ -111,6 +112,7 @@ struct sde_rm {
 	uint32_t rsvp_next_seq;
 	struct mutex rm_lock;
 	const struct sde_rm_topology_def *topology_tbl;
+	struct msm_resource_caps_info avail_res;
 };
 
 /**
@@ -312,4 +314,14 @@ int sde_rm_ext_blk_create_reserve(struct sde_rm *rm,
  */
 int sde_rm_ext_blk_destroy(struct sde_rm *rm,
 				struct drm_encoder *enc);
+
+/**
+ * sde_rm_get_resource_info - returns avail hw resource info
+ * @mr: sde rm object
+ * @drm_enc: drm encoder object
+ * @avail_res: out parameter, available resource object
+ */
+void sde_rm_get_resource_info(struct sde_rm *rm,
+		struct drm_encoder *drm_enc,
+		struct msm_resource_caps_info *avail_res);
 #endif /* __SDE_RM_H__ */