diff --git a/Documentation/ABI/testing/debugfs-dwc-pcie b/Documentation/ABI/testing/debugfs-dwc-pcie
new file mode 100644
index 000000000000..e8ed34e988ef
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-dwc-pcie
@@ -0,0 +1,13 @@
+What:		/sys/kernel/debug/dwc_pcie_<dev>/rasdes_debug/lane_detect
+Date:		Feburary 2025
+Contact:	Shradha Todi <shradha.t@samsung.com>
+Description:	(RW) Write the lane number to be checked for detection.	Read
+		will return whether PHY indicates receiver detection on the
+		selected lane. The default selected lane is Lane0.
+
+What:		/sys/kernel/debug/dwc_pcie_<dev>/rasdes_debug/rx_valid
+Date:		Feburary 2025
+Contact:	Shradha Todi <shradha.t@samsung.com>
+Description:	(RW) Write the lane number to be checked as valid or invalid. Read
+		will return the status of PIPE RXVALID signal of the selected lane.
+		The default selected lane is Lane0.
diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index b6d6778b0698..48a10428a492 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -6,6 +6,16 @@ menu "DesignWare-based PCIe controllers"
 config PCIE_DW
 	bool
 
+config PCIE_DW_DEBUGFS
+	default y
+	depends on DEBUG_FS
+	depends on PCIE_DW_HOST || PCIE_DW_EP
+	bool "DWC PCIe debugfs entries"
+	help
+	  Enables debugfs entries for the DW PCIe Controller. These entries
+	  provide all debug features related to DW controller including the RAS
+	  DES features to help in debug, error injection and statistical counters.
+
 config PCIE_DW_HOST
 	bool
 	select PCIE_DW
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index a8308d9ea986..54565eedc52c 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_PCIE_DW) += pcie-designware.o
+obj-$(CONFIG_PCIE_DW_DEBUGFS) += pcie-designware-debugfs.o
 obj-$(CONFIG_PCIE_DW_HOST) += pcie-designware-host.o
 obj-$(CONFIG_PCIE_DW_EP) += pcie-designware-ep.o
 obj-$(CONFIG_PCIE_DW_PLAT) += pcie-designware-plat.o
diff --git a/drivers/pci/controller/dwc/pcie-designware-debugfs.c b/drivers/pci/controller/dwc/pcie-designware-debugfs.c
new file mode 100644
index 000000000000..3887a6996706
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-designware-debugfs.c
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Synopsys DesignWare PCIe controller debugfs driver
+ *
+ * Copyright (C) 2025 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Shradha Todi <shradha.t@samsung.com>
+ */
+
+#include <linux/debugfs.h>
+
+#include "pcie-designware.h"
+
+#define SD_STATUS_L1LANE_REG		0xb0
+#define PIPE_RXVALID			BIT(18)
+#define PIPE_DETECT_LANE		BIT(17)
+#define LANE_SELECT			GENMASK(3, 0)
+
+#define DWC_DEBUGFS_BUF_MAX		128
+
+/**
+ * struct dwc_pcie_rasdes_info - Stores controller common information
+ * @ras_cap_offset: RAS DES vendor specific extended capability offset
+ * @reg_event_lock: Mutex used for RASDES shadow event registers
+ *
+ * Any parameter constant to all files of the debugfs hierarchy for a single controller
+ * will be stored in this struct. It is allocated and assigned to controller specific
+ * struct dw_pcie during initialization.
+ */
+struct dwc_pcie_rasdes_info {
+	u32 ras_cap_offset;
+	struct mutex reg_event_lock;
+};
+
+static ssize_t lane_detect_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+{
+	struct dw_pcie *pci = file->private_data;
+	struct dwc_pcie_rasdes_info *rinfo = pci->debugfs->rasdes_info;
+	char debugfs_buf[DWC_DEBUGFS_BUF_MAX];
+	ssize_t pos;
+	u32 val;
+
+	val = dw_pcie_readl_dbi(pci, rinfo->ras_cap_offset + SD_STATUS_L1LANE_REG);
+	val = FIELD_GET(PIPE_DETECT_LANE, val);
+	if (val)
+		pos = scnprintf(debugfs_buf, DWC_DEBUGFS_BUF_MAX, "Lane Detected\n");
+	else
+		pos = scnprintf(debugfs_buf, DWC_DEBUGFS_BUF_MAX, "Lane Undetected\n");
+
+	return simple_read_from_buffer(buf, count, ppos, debugfs_buf, pos);
+}
+
+static ssize_t lane_detect_write(struct file *file, const char __user *buf,
+				 size_t count, loff_t *ppos)
+{
+	struct dw_pcie *pci = file->private_data;
+	struct dwc_pcie_rasdes_info *rinfo = pci->debugfs->rasdes_info;
+	u32 lane, val;
+
+	val = kstrtou32_from_user(buf, count, 0, &lane);
+	if (val)
+		return val;
+
+	val = dw_pcie_readl_dbi(pci, rinfo->ras_cap_offset + SD_STATUS_L1LANE_REG);
+	val &= ~(LANE_SELECT);
+	val |= FIELD_PREP(LANE_SELECT, lane);
+	dw_pcie_writel_dbi(pci, rinfo->ras_cap_offset + SD_STATUS_L1LANE_REG, val);
+
+	return count;
+}
+
+static ssize_t rx_valid_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+{
+	struct dw_pcie *pci = file->private_data;
+	struct dwc_pcie_rasdes_info *rinfo = pci->debugfs->rasdes_info;
+	char debugfs_buf[DWC_DEBUGFS_BUF_MAX];
+	ssize_t pos;
+	u32 val;
+
+	val = dw_pcie_readl_dbi(pci, rinfo->ras_cap_offset + SD_STATUS_L1LANE_REG);
+	val = FIELD_GET(PIPE_RXVALID, val);
+	if (val)
+		pos = scnprintf(debugfs_buf, DWC_DEBUGFS_BUF_MAX, "RX Valid\n");
+	else
+		pos = scnprintf(debugfs_buf, DWC_DEBUGFS_BUF_MAX, "RX Invalid\n");
+
+	return simple_read_from_buffer(buf, count, ppos, debugfs_buf, pos);
+}
+
+static ssize_t rx_valid_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+	return lane_detect_write(file, buf, count, ppos);
+}
+
+#define dwc_debugfs_create(name)			\
+debugfs_create_file(#name, 0644, rasdes_debug, pci,	\
+			&dbg_ ## name ## _fops)
+
+#define DWC_DEBUGFS_FOPS(name)					\
+static const struct file_operations dbg_ ## name ## _fops = {	\
+	.open = simple_open,				\
+	.read = name ## _read,				\
+	.write = name ## _write				\
+}
+
+DWC_DEBUGFS_FOPS(lane_detect);
+DWC_DEBUGFS_FOPS(rx_valid);
+
+static void dwc_pcie_rasdes_debugfs_deinit(struct dw_pcie *pci)
+{
+	struct dwc_pcie_rasdes_info *rinfo = pci->debugfs->rasdes_info;
+
+	mutex_destroy(&rinfo->reg_event_lock);
+}
+
+static int dwc_pcie_rasdes_debugfs_init(struct dw_pcie *pci, struct dentry *dir)
+{
+	struct dentry *rasdes_debug;
+	struct dwc_pcie_rasdes_info *rasdes_info;
+	struct device *dev = pci->dev;
+	int ras_cap;
+
+	ras_cap = dw_pcie_find_rasdes_capability(pci);
+	if (!ras_cap) {
+		dev_dbg(dev, "no RASDES capability available\n");
+		return -ENODEV;
+	}
+
+	rasdes_info = devm_kzalloc(dev, sizeof(*rasdes_info), GFP_KERNEL);
+	if (!rasdes_info)
+		return -ENOMEM;
+
+	/* Create subdirectories for Debug, Error injection, Statistics */
+	rasdes_debug = debugfs_create_dir("rasdes_debug", dir);
+
+	mutex_init(&rasdes_info->reg_event_lock);
+	rasdes_info->ras_cap_offset = ras_cap;
+	pci->debugfs->rasdes_info = rasdes_info;
+
+	/* Create debugfs files for Debug subdirectory */
+	dwc_debugfs_create(lane_detect);
+	dwc_debugfs_create(rx_valid);
+
+	return 0;
+}
+
+void dwc_pcie_debugfs_deinit(struct dw_pcie *pci)
+{
+	dwc_pcie_rasdes_debugfs_deinit(pci);
+	debugfs_remove_recursive(pci->debugfs->debug_dir);
+}
+
+int dwc_pcie_debugfs_init(struct dw_pcie *pci)
+{
+	char dirname[DWC_DEBUGFS_BUF_MAX];
+	struct device *dev = pci->dev;
+	struct debugfs_info *debugfs;
+	struct dentry *dir;
+	int ret;
+
+	/* Create main directory for each platform driver */
+	snprintf(dirname, DWC_DEBUGFS_BUF_MAX, "dwc_pcie_%s", dev_name(dev));
+	dir = debugfs_create_dir(dirname, NULL);
+	debugfs = devm_kzalloc(dev, sizeof(*debugfs), GFP_KERNEL);
+	if (!debugfs)
+		return -ENOMEM;
+
+	debugfs->debug_dir = dir;
+	pci->debugfs = debugfs;
+	ret = dwc_pcie_rasdes_debugfs_init(pci, dir);
+	if (ret)
+		dev_dbg(dev, "RASDES debugfs init failed\n");
+
+	return 0;
+}
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 72418160e658..f9d7f3f989ad 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -814,6 +814,7 @@ void dw_pcie_ep_cleanup(struct dw_pcie_ep *ep)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
 
+	dwc_pcie_debugfs_deinit(pci);
 	dw_pcie_edma_remove(pci);
 }
 EXPORT_SYMBOL_GPL(dw_pcie_ep_cleanup);
@@ -989,6 +990,10 @@ int dw_pcie_ep_init_registers(struct dw_pcie_ep *ep)
 
 	dw_pcie_ep_init_non_sticky_registers(pci);
 
+	ret = dwc_pcie_debugfs_init(pci);
+	if (ret)
+		goto err_remove_edma;
+
 	return 0;
 
 err_remove_edma:
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index ffaded8f2df7..2081e8c72d12 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -548,6 +548,10 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp)
 	if (pp->ops->post_init)
 		pp->ops->post_init(pp);
 
+	ret = dwc_pcie_debugfs_init(pci);
+	if (ret)
+		goto err_stop_link;
+
 	return 0;
 
 err_stop_link:
@@ -572,6 +576,8 @@ void dw_pcie_host_deinit(struct dw_pcie_rp *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 
+	dwc_pcie_debugfs_deinit(pci);
+
 	pci_stop_root_bus(pp->bridge->bus);
 	pci_remove_root_bus(pp->bridge->bus);
 
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index a7c0671c6715..3d1d95d9e380 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -323,6 +323,12 @@ static u16 dw_pcie_find_vsec_capability(struct dw_pcie *pci,
 	return 0;
 }
 
+u16 dw_pcie_find_rasdes_capability(struct dw_pcie *pci)
+{
+	return dw_pcie_find_vsec_capability(pci, dwc_pcie_rasdes_vsec_ids);
+}
+EXPORT_SYMBOL_GPL(dw_pcie_find_rasdes_capability);
+
 int dw_pcie_read(void __iomem *addr, int size, u32 *val)
 {
 	if (!IS_ALIGNED((uintptr_t)addr, size)) {
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 501d9ddfea16..7f9807d4e5de 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -437,6 +437,11 @@ struct dw_pcie_ops {
 	void	(*stop_link)(struct dw_pcie *pcie);
 };
 
+struct debugfs_info {
+	struct dentry		*debug_dir;
+	void			*rasdes_info;
+};
+
 struct dw_pcie {
 	struct device		*dev;
 	void __iomem		*dbi_base;
@@ -465,6 +470,7 @@ struct dw_pcie {
 	struct reset_control_bulk_data	core_rsts[DW_PCIE_NUM_CORE_RSTS];
 	struct gpio_desc		*pe_rst;
 	bool			suspended;
+	struct debugfs_info	*debugfs;
 };
 
 #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
@@ -478,6 +484,7 @@ void dw_pcie_version_detect(struct dw_pcie *pci);
 
 u8 dw_pcie_find_capability(struct dw_pcie *pci, u8 cap);
 u16 dw_pcie_find_ext_capability(struct dw_pcie *pci, u8 cap);
+u16 dw_pcie_find_rasdes_capability(struct dw_pcie *pci);
 
 int dw_pcie_read(void __iomem *addr, int size, u32 *val);
 int dw_pcie_write(void __iomem *addr, int size, u32 val);
@@ -806,4 +813,18 @@ dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no)
 	return NULL;
 }
 #endif
+
+#ifdef CONFIG_PCIE_DW_DEBUGFS
+int dwc_pcie_debugfs_init(struct dw_pcie *pci);
+void dwc_pcie_debugfs_deinit(struct dw_pcie *pci);
+#else
+static inline int dwc_pcie_debugfs_init(struct dw_pcie *pci)
+{
+	return 0;
+}
+static inline void dwc_pcie_debugfs_deinit(struct dw_pcie *pci)
+{
+}
+#endif
+
 #endif /* _PCIE_DESIGNWARE_H */
diff --git a/include/linux/pcie-dwc.h b/include/linux/pcie-dwc.h
index 40f3545731c8..6436e7fadc75 100644
--- a/include/linux/pcie-dwc.h
+++ b/include/linux/pcie-dwc.h
@@ -28,6 +28,8 @@ static const struct dwc_pcie_vsec_id dwc_pcie_rasdes_vsec_ids[] = {
 	  .vsec_id = 0x02, .vsec_rev = 0x4 },
 	{ .vendor_id = PCI_VENDOR_ID_QCOM,
 	  .vsec_id = 0x02, .vsec_rev = 0x4 },
+	{ .vendor_id = PCI_VENDOR_ID_SAMSUNG,
+	  .vsec_id = 0x02, .vsec_rev = 0x4 },
 	{} /* terminator */
 };
 
