disp: msm: sde: add ctl api to enable/disable sub-blocks

Certain sub-blocks need to be enabled disabled dynamically on a
seemless mode switch (for ex. partial update) CWB is another example
where control path interface configuration needs to be dynamically
changed on enable/disable of concurrent writeback. Similarly
3d mux needs to be enabled/disabled for partial update use cases.
This change modfies the current api update_cwb_cfg and makes it
more generic and adds support to enable/disable only the 3d mux.

Change-Id: I5e5a6e78b0599f689cb2f83d0d626a5f392eff6e
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>

msm/sde/sde_hw_ctl.h

@@ -249,10 +249,10 @@ struct sde_hw_ctl_ops {
 	/** update cwb  for ctl_path
 	 * @ctx       : ctl path ctx pointer
 	 * @cfg    : interface config structure pointer
-	 * @enable    : enable/disable the cwb hw block
+	 * @enable    : enable/disable the dynamic sub-blocks in interface cfg
 	 * @Return: error code
 	 */
-	int (*update_cwb_cfg)(struct sde_hw_ctl *ctx,
+	int (*update_intf_cfg)(struct sde_hw_ctl *ctx,
 		struct sde_hw_intf_cfg_v1 *cfg, bool enable);
 
 	/**