msm: camera: utils: Use mmrm api to check if mmrm is supported

Targets which use same SPF with CONFIG_MMRM enabled - but one
chipset need to use mmrm, other doesn't need. In such cases,
calling this mmrm API helps to differentiate the flow.
Returns false if mmrm is not supported and true if mmrm is
supported.

CRs-Fixed: 3066104
Change-Id: I11ad3c02e66575905a01e1eb0b6a8e053acfbe46
Signed-off-by: Vikram Sharma <vikramsa@codeaurora.org>

drivers/cam_utils/cam_soc_util.c

@@ -14,7 +14,6 @@
 #include "cam_mem_mgr.h"
 #include "cam_presil_hw_access.h"
 
-
 #define CAM_TO_MASK(bitn)          (1 << (int)(bitn))
 #define CAM_IS_BIT_SET(mask, bit)  ((mask) & CAM_TO_MASK(bit))
 #define CAM_SET_BIT(mask, bit)     ((mask) |= CAM_TO_MASK(bit))
@@ -86,11 +85,14 @@ static LIST_HEAD(wrapper_clk_list);
 #if IS_REACHABLE(CONFIG_MSM_MMRM)
 bool cam_is_mmrm_supported_on_current_chip(void)
 {
-	/*
-	 * Enable on chipsets where mmrm does the resource management.
-	 * Either based on query API from mmrm or based on camera dt flag.
-	 */
-	return true;
+	bool is_supported;
+
+	is_supported = mmrm_client_check_scaling_supported(MMRM_CLIENT_CLOCK,
+			MMRM_CLIENT_DOMAIN_CAMERA);
+	CAM_DBG(CAM_UTIL, "is mmrm supported: %s",
+			CAM_BOOL_TO_YESNO(is_supported));;
+
+	return is_supported;
 }
 
 int cam_mmrm_notifier_callback(
@@ -1289,7 +1291,8 @@ int cam_soc_util_clk_disable(struct cam_hw_soc_info *soc_info,
 			"Dev %s clk %s Disabling Shared clk, set 0 rate",
 			soc_info->dev_name, clk_name);
 		cam_soc_util_clk_wrapper_set_clk_rate(clk_id, soc_info, clk, 0);
-	} else if ((!skip_mmrm_set_rate) && (soc_info->src_clk_idx == clk_idx)) {
+	} else if (soc_info->mmrm_handle && (!skip_mmrm_set_rate) &&
+			(soc_info->src_clk_idx == clk_idx)) {
 		CAM_DBG(CAM_UTIL,
 			"Dev %s Disabling %s clk, set 0 rate", soc_info->dev_name, clk_name);
 		cam_soc_util_set_rate_through_mmrm(