disp: msm: dsi: register io resource collection VM event hook

Add support to read register ranges and IRQ lines that needs
isolation during VM switch in dsi ctrl and dsi phy.
Register for VM resource collection event providing the
callback function.

Change-Id: I5eae4699b0a97ffed438627ccea855c401b3fbeb
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>

msm/dsi/dsi_phy.c

@@ -116,6 +116,27 @@ int dsi_phy_get_version(struct msm_dsi_phy *phy)
 	return phy->ver_info->version;
 }
 
+int dsi_phy_get_io_resources(struct msm_io_res *io_res)
+{
+	struct dsi_phy_list_item *dsi_phy;
+	int rc = 0;
+
+	mutex_lock(&dsi_phy_list_lock);
+
+	list_for_each_entry(dsi_phy, &dsi_phy_list, list) {
+		rc = msm_dss_get_io_mem(dsi_phy->phy->pdev, &io_res->mem);
+		if (rc) {
+			DSI_PHY_ERR(dsi_phy->phy,
+					"failed to get io mem, rc = %d\n", rc);
+			return rc;
+		}
+	}
+
+	mutex_unlock(&dsi_phy_list_lock);
+
+	return rc;
+}
+
 static int dsi_phy_regmap_init(struct platform_device *pdev,
 			       struct msm_dsi_phy *phy)
 {