msm: mdss: Add client name to register bus client handle

Add debug name to register bus client. This will help debug
issues that involved register bus client.

Change-Id: Ied505e5af9e09ba183c25340e6051214a93bc3d2
Signed-off-by: Terence Hampson <thampson@codeaurora.org>

drivers/video/fbdev/msm/mdss.h

@@ -30,6 +30,7 @@
 
 #define MAX_DRV_SUP_MMB_BLKS	44
 #define MAX_DRV_SUP_PIPES 10
+#define MAX_CLIENT_NAME_LEN 20
 
 #define MDSS_PINCTRL_STATE_DEFAULT "mdss_default"
 #define MDSS_PINCTRL_STATE_SLEEP  "mdss_sleep"
@@ -174,6 +175,7 @@ enum mdss_qos_settings {
 };
 
 struct reg_bus_client {
+	char name[MAX_CLIENT_NAME_LEN];
 	short usecase_ndx;
 	u32 id;
 	struct list_head list;
@@ -463,7 +465,7 @@ void mdss_bus_bandwidth_ctrl(int enable);
 int mdss_iommu_ctrl(int enable);
 int mdss_bus_scale_set_quota(int client, u64 ab_quota, u64 ib_quota);
 int mdss_update_reg_bus_vote(struct reg_bus_client *, u32 usecase_ndx);
-struct reg_bus_client *mdss_reg_bus_vote_client_create(void);
+struct reg_bus_client *mdss_reg_bus_vote_client_create(char *client_name);
 void mdss_reg_bus_vote_client_destroy(struct reg_bus_client *);
 
 struct mdss_util_intf {

drivers/video/fbdev/msm/mdss_dsi_clk.c

@@ -872,7 +872,7 @@ void *mdss_dsi_clk_init(struct mdss_dsi_clk_info *info)
 	mngr->pre_clkoff_cb = info->pre_clkoff_cb;
 	mngr->post_clkoff_cb = info->post_clkoff_cb;
 	mngr->priv_data = info->priv_data;
-	mngr->reg_bus_clt = mdss_reg_bus_vote_client_create();
+	mngr->reg_bus_clt = mdss_reg_bus_vote_client_create(info->name);
 	if (IS_ERR_OR_NULL(mngr->reg_bus_clt)) {
 		pr_err("Unable to get handle for reg bus vote\n");
 		kfree(mngr);

drivers/video/fbdev/msm/mdss_hdmi_tx.c

@@ -2358,6 +2358,7 @@ static int hdmi_tx_config_power(struct hdmi_tx_ctrl *hdmi_ctrl,
 {
 	int rc = 0;
 	struct dss_module_power *power_data = NULL;
+	char name[MAX_CLIENT_NAME_LEN];
 
 	if (!hdmi_ctrl || module >= HDMI_TX_MAX_PM) {
 		DEV_ERR("%s: Error: invalid input\n", __func__);
@@ -2381,8 +2382,9 @@ static int hdmi_tx_config_power(struct hdmi_tx_ctrl *hdmi_ctrl,
 			goto exit;
 		}
 
+		snprintf(name, MAX_CLIENT_NAME_LEN, "hdmi:%u", module);
 		hdmi_ctrl->pdata.reg_bus_clt[module] =
-			mdss_reg_bus_vote_client_create();
+			mdss_reg_bus_vote_client_create(name);
 		if (IS_ERR_OR_NULL(hdmi_ctrl->pdata.reg_bus_clt[module])) {
 			pr_err("reg bus client create failed\n");
 			msm_dss_config_vreg(&hdmi_ctrl->pdev->dev,

drivers/video/fbdev/msm/mdss_mdp.c

@@ -371,19 +371,26 @@ static int mdss_mdp_bus_scale_set_quota(u64 ab_quota_rt, u64 ab_quota_nrt,
 	return rc;
 }
 
-struct reg_bus_client *mdss_reg_bus_vote_client_create()
+struct reg_bus_client *mdss_reg_bus_vote_client_create(char *client_name)
 {
 	struct reg_bus_client *client;
 	static u32 id;
 
+	if (client_name == NULL) {
+		pr_err("client name is null\n");
+		return ERR_PTR(-EINVAL);
+	}
+
 	client = kzalloc(sizeof(struct reg_bus_client), GFP_KERNEL);
 	if (!client)
 		return ERR_PTR(-ENOMEM);
 
 	mutex_lock(&mdss_res->reg_bus_lock);
+	strlcpy(client->name, client_name, MAX_CLIENT_NAME_LEN);
 	client->usecase_ndx = VOTE_INDEX_DISABLE;
 	client->id = id;
-	pr_debug("bus vote client created:%p id :%d\n", client, id);
+	pr_debug("bus vote client %s created:%p id :%d\n", client_name,
+		client, id);
 	id++;
 	list_add(&client->list, &mdss_res->reg_bus_clist);
 	mutex_unlock(&mdss_res->reg_bus_lock);
@@ -396,8 +403,8 @@ void mdss_reg_bus_vote_client_destroy(struct reg_bus_client *client)
 	if (!client) {
 		pr_err("reg bus vote: invalid client handle\n");
 	} else {
-		pr_debug("bus vote client destroyed:%p id:%u\n",
+		pr_debug("bus vote client %s destroyed:%p id:%u\n",
-			client, client->id);
+			client->name, client, client->id);
 		mutex_lock(&mdss_res->reg_bus_lock);
 		list_del_init(&client->list);
 		mutex_unlock(&mdss_res->reg_bus_lock);
@@ -430,9 +437,9 @@ int mdss_update_reg_bus_vote(struct reg_bus_client *bus_client, u32 usecase_ndx)
 		mdss_res->reg_bus_usecase_ndx = max_usecase_ndx;
 	}
 
-	pr_debug("%pS: changed=%d current idx=%d request client id:%u idx:%d\n",
+	pr_debug("%pS: changed=%d current idx=%d request client %s id:%u idx:%d\n",
 		__builtin_return_address(0), changed, max_usecase_ndx,
-		bus_client->id, usecase_ndx);
+		bus_client->name, bus_client->id, usecase_ndx);
 	MDSS_XLOG(changed, max_usecase_ndx, bus_client->id, usecase_ndx);
 	if (changed)
 		ret = msm_bus_scale_client_update_request(mdss_res->reg_bus_hdl,
@@ -1091,7 +1098,7 @@ static int mdss_mdp_irq_clk_setup(struct mdss_data_type *mdata)
 		mdata->vdd_cx = NULL;
 	}
 
-	mdata->reg_bus_clt = mdss_reg_bus_vote_client_create();
+	mdata->reg_bus_clt = mdss_reg_bus_vote_client_create("mdp\0");
 	if (IS_ERR_OR_NULL(mdata->reg_bus_clt)) {
 		pr_err("bus client register failed\n");
 		return PTR_ERR(mdata->reg_bus_clt);

drivers/video/fbdev/msm/mdss_smmu.c

@@ -506,6 +506,7 @@ int mdss_smmu_probe(struct platform_device *pdev)
 	const struct of_device_id *match;
 	struct dss_module_power *mp;
 	int disable_htw = 1;
+	char name[MAX_CLIENT_NAME_LEN];
 
 	if (!mdata) {
 		pr_err("probe failed as mdata is not initialized\n");
@@ -569,7 +570,8 @@ int mdss_smmu_probe(struct platform_device *pdev)
 		return rc;
 	}
 
-	mdss_smmu->reg_bus_clt = mdss_reg_bus_vote_client_create();
+	snprintf(name, MAX_CLIENT_NAME_LEN, "smmu:%u", domain);
+	mdss_smmu->reg_bus_clt = mdss_reg_bus_vote_client_create(name);
 	if (IS_ERR_OR_NULL(mdss_smmu->reg_bus_clt)) {
 		pr_err("mdss bus client register failed\n");
 		msm_dss_config_vreg(&pdev->dev, mp->vreg_config, mp->num_vreg,