Merge "defconfig: Enable CONFIG_UFS_DBG for general builds"

arch/arm64/configs/vendor/lahaina_QGKI.config

@@ -58,6 +58,7 @@ CONFIG_LIMIT_MOVABLE_ZONE_ALLOC=y
 CONFIG_MSM_BT_POWER=m
 CONFIG_I2C_RTC6226_QCA=m
 CONFIG_SCSI_UFSHCD_QTI=y
+# CONFIG_UFS_DBG is not set
 CONFIG_SCSI_UFS_BSG=y
 CONFIG_MSM_EXT_DISPLAY=y
 CONFIG_SCSI_UFSHCD=y

arch/arm64/configs/vendor/lahaina_consolidate.config

@@ -58,3 +58,4 @@ CONFIG_QCOM_IRQ_STAT=y
 CONFIG_QCOM_INITIAL_LOGBUF=y
 CONFIG_QCOM_DYN_MINIDUMP_STACK=y
 CONFIG_QCOM_MINIDUMP_PANIC_CPU_CONTEXT=y
+CONFIG_UFS_DBG=y

drivers/scsi/ufs/Kconfig

@@ -68,6 +68,17 @@ config SCSI_UFSHCD_QTI
 	  However, do not compile this as a module if your root file system
 	  (the one containing the directory /) is located on a UFS device.
 
+config UFS_DBG
+	bool "Universal Flash Storage Debug Mode"
+	depends on (SCSI_UFSHCD || SCSI_UFSHCD_QTI)
+	help
+	This selects the debug mode for ufs vendor driver.
+	  Enables tracing for QTI ufs driver.
+	  This also enables ftrace for ufs core and SCSI.
+	  Enabling this would have an adverse performance impact on disk IO.
+
+	  If unsure, say N.
+
 config SCSI_UFSHCD_PCI
 	tristate "PCI bus based UFS Controller support"
 	depends on SCSI_UFSHCD && PCI

drivers/scsi/ufs/ufs-qcom.c

@@ -3595,12 +3595,28 @@ static ssize_t err_count_show(struct device *dev,
 
 static DEVICE_ATTR_RO(err_count);
 
+static ssize_t dbg_state_show(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	int dbg_en = 0;
+
+#if defined(CONFIG_UFS_DBG)
+	dbg_en = 1;
+#endif
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n", dbg_en);
+}
+
+
+static DEVICE_ATTR_RO(dbg_state);
+
 static struct attribute *ufs_qcom_sysfs_attrs[] = {
 	&dev_attr_err_state.attr,
 	&dev_attr_power_mode.attr,
 	&dev_attr_bus_speed_mode.attr,
 	&dev_attr_clk_status.attr,
 	&dev_attr_err_count.attr,
+	&dev_attr_dbg_state.attr,
 	NULL
 };