disp: msm: sde: dump clock state before entering suspend

Add debug capability to dump clocks before entering pm suspend.
This will help debug invalid register access when clocks are off
during adversarial test cases.

Change-Id: I80d19b751a3b9a1de0cc64699a21a1852d614ced
Signed-off-by: Amine Najahi <anajahi@codeaurora.org>

msm/dsi/dsi_clk_manager.c

@@ -1396,6 +1396,27 @@ void dsi_display_clk_mngr_update_splash_status(void *clk_mgr, bool status)
 	mngr->is_cont_splash_enabled = status;
 }
 
+int dsi_display_dump_clk_handle_state(void *client)
+{
+	struct dsi_clk_mngr *mngr;
+	struct dsi_clk_client_info *c = client;
+
+	if (!c || !c->mngr) {
+		DSI_ERR("Invalid params\n");
+		return -EINVAL;
+	}
+
+	mngr = c->mngr;
+	mutex_lock(&mngr->clk_mutex);
+	DSI_INFO("[%s]%s: Core (ref=%d, state=%d), Link (ref=%d, state=%d)\n",
+			mngr->name, c->name, c->core_refcount,
+			c->core_clk_state, c->link_refcount,
+			c->link_clk_state);
+	mutex_unlock(&mngr->clk_mutex);
+
+	return 0;
+}
+
 void *dsi_display_clk_mngr_register(struct dsi_clk_info *info)
 {
 	struct dsi_clk_mngr *mngr;