diff --git a/drivers/firmware/qcom_scm-smc.c b/drivers/firmware/qcom_scm-smc.c
index c05f7c1bb183..555c22b76eee 100644
--- a/drivers/firmware/qcom_scm-smc.c
+++ b/drivers/firmware/qcom_scm-smc.c
@@ -1501,6 +1501,94 @@ int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
 	return ret;
 }
 
+int __qcom_scm_lmh_read_buf_size(struct device *dev, int *size)
+{
+	int ret;
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_LMH,
+		.cmd = QCOM_SCM_LMH_DEBUG_READ_BUF_SIZE,
+		.owner = ARM_SMCCC_OWNER_SIP
+	};
+
+	desc.arginfo = QCOM_SCM_ARGS(0);
+
+	ret = qcom_scm_call(dev, &desc);
+
+	if (size)
+		*size = desc.res[0];
+
+	return ret;
+}
+
+int __qcom_scm_lmh_debug_read(struct device *dev, phys_addr_t payload,
+				uint32_t size)
+{
+	int ret;
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_LMH,
+		.cmd = QCOM_SCM_LMH_DEBUG_READ,
+		.owner = ARM_SMCCC_OWNER_SIP
+	};
+
+	desc.args[0] = payload;
+	desc.args[1] = size;
+	desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL);
+
+	ret = qcom_scm_call(dev, &desc);
+
+	return ret ? : desc.res[0];
+}
+
+int __qcom_scm_lmh_debug_config_write(struct device *dev, u64 cmd_id,
+			phys_addr_t payload, int payload_size, uint32_t *buf,
+			int buf_size)
+{
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_LMH,
+		.cmd = cmd_id,
+		.owner = ARM_SMCCC_OWNER_SIP
+	};
+
+	if (buf_size < 3)
+		return -EINVAL;
+
+	desc.args[0] = payload;
+	desc.args[1] = payload_size;
+	desc.args[2] = buf[0];
+	desc.args[3] = buf[1];
+	desc.args[4] = buf[2];
+	desc.arginfo = QCOM_SCM_ARGS(5, QCOM_SCM_RO, QCOM_SCM_VAL, QCOM_SCM_VAL,
+					QCOM_SCM_VAL, QCOM_SCM_VAL);
+
+	return qcom_scm_call(dev, &desc);
+}
+
+int __qcom_scm_lmh_get_type(struct device *dev, phys_addr_t payload,
+			u64 payload_size, u64 debug_type, uint32_t get_from,
+			uint32_t *size)
+{
+	int ret;
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_LMH,
+		.cmd = QCOM_SCM_LMH_DEBUG_GET_TYPE,
+		.owner = ARM_SMCCC_OWNER_SIP
+	};
+
+	desc.args[0] = payload;
+	desc.args[1] = payload_size;
+	desc.args[2] = debug_type;
+	desc.args[3] = get_from;
+	desc.arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_RW, QCOM_SCM_VAL, QCOM_SCM_VAL,
+					QCOM_SCM_VAL);
+
+	ret = qcom_scm_call(dev, &desc);
+
+	if (size)
+		*size = desc.res[0];
+
+	return ret;
+}
+
 int __qcom_scm_smmu_change_pgtbl_format(struct device *dev, u64 dev_id,
 					int cbndx)
 {
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 5f4a42a4109b..40c31a147f95 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -675,6 +675,63 @@ int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp)
 }
 EXPORT_SYMBOL(qcom_scm_hdcp_req);
 
+bool qcom_scm_is_lmh_debug_set_available(void)
+{
+	return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_LMH,
+					QCOM_SCM_LMH_DEBUG_SET);
+}
+EXPORT_SYMBOL(qcom_scm_is_lmh_debug_set_available);
+
+bool qcom_scm_is_lmh_debug_read_buf_size_available(void)
+{
+	return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_LMH,
+					QCOM_SCM_LMH_DEBUG_READ_BUF_SIZE);
+}
+EXPORT_SYMBOL(qcom_scm_is_lmh_debug_read_buf_size_available);
+
+bool qcom_scm_is_lmh_debug_read_buf_available(void)
+{
+	return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_LMH,
+					QCOM_SCM_LMH_DEBUG_READ);
+}
+EXPORT_SYMBOL(qcom_scm_is_lmh_debug_read_buf_available);
+
+bool qcom_scm_is_lmh_debug_get_type_available(void)
+{
+	return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_LMH,
+					QCOM_SCM_LMH_DEBUG_GET_TYPE);
+}
+EXPORT_SYMBOL(qcom_scm_is_lmh_debug_get_type_available);
+
+int qcom_scm_lmh_read_buf_size(int *size)
+{
+	return __qcom_scm_lmh_read_buf_size(__scm->dev, size);
+}
+EXPORT_SYMBOL(qcom_scm_lmh_read_buf_size);
+
+int qcom_scm_lmh_debug_read(phys_addr_t payload, uint32_t size)
+{
+	return __qcom_scm_lmh_debug_read(__scm->dev, payload, size);
+}
+EXPORT_SYMBOL(qcom_scm_lmh_debug_read);
+
+int qcom_scm_lmh_debug_set_config_write(phys_addr_t payload, int payload_size,
+					uint32_t *buf, int buf_size)
+{
+	return __qcom_scm_lmh_debug_config_write(__scm->dev,
+			QCOM_SCM_LMH_DEBUG_SET, payload, payload_size, buf,
+			buf_size);
+}
+EXPORT_SYMBOL(qcom_scm_lmh_debug_set_config_write);
+
+int qcom_scm_lmh_get_type(phys_addr_t payload, u64 payload_size,
+		u64 debug_type, uint32_t get_from, uint32_t *size)
+{
+	return __qcom_scm_lmh_get_type(__scm->dev, payload, payload_size,
+					debug_type, get_from, size);
+}
+EXPORT_SYMBOL(qcom_scm_lmh_get_type);
+
 int qcom_scm_smmu_change_pgtbl_format(u64 dev_id, int cbndx)
 {
 	return __qcom_scm_smmu_change_pgtbl_format(__scm->dev, dev_id, cbndx);
diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
index 5cfbe46b1971..0e213fa24123 100644
--- a/drivers/firmware/qcom_scm.h
+++ b/drivers/firmware/qcom_scm.h
@@ -161,6 +161,21 @@ extern int __qcom_scm_clear_ice_key(struct device *dev, uint32_t index,
 extern int __qcom_scm_hdcp_req(struct device *dev,
 		struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp);
 
+#define QCOM_SCM_SVC_LMH			0x13
+#define QCOM_SCM_LMH_DEBUG_SET			0x08
+#define QCOM_SCM_LMH_DEBUG_READ_BUF_SIZE	0x09
+#define QCOM_SCM_LMH_DEBUG_READ			0x0A
+#define QCOM_SCM_LMH_DEBUG_GET_TYPE		0x0B
+extern int __qcom_scm_lmh_read_buf_size(struct device *dev, int *size);
+extern int __qcom_scm_lmh_debug_read(struct device *dev, phys_addr_t payload,
+					uint32_t size);
+extern int __qcom_scm_lmh_debug_config_write(struct device *dev, u64 cmd_id,
+			phys_addr_t payload, int payload_size, uint32_t *buf,
+			int buf_size);
+extern int __qcom_scm_lmh_get_type(struct device *dev, phys_addr_t payload,
+			u64 payload_size, u64 debug_type, uint32_t get_from,
+			uint32_t *size);
+
 #define QCOM_SCM_SVC_SMMU_PROGRAM		0x15
 #define QCOM_SCM_SMMU_CHANGE_PGTBL_FORMAT	0x01
 #define QCOM_SCM_SMMU_SECURE_LUT		0x03
diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
index aeec3199d410..ffbe5e8f55d3 100644
--- a/include/linux/qcom_scm.h
+++ b/include/linux/qcom_scm.h
@@ -98,6 +98,16 @@ extern int qcom_scm_delete_shm_bridge(u64 handle);
 extern int qcom_scm_create_shm_bridge(u64 pfn_and_ns_perm_flags,
 			u64 ipfn_and_s_perm_flags, u64 size_and_flags,
 			u64 ns_vmids, u64 *handle);
+extern bool qcom_scm_is_lmh_debug_set_available(void);
+extern bool qcom_scm_is_lmh_debug_read_buf_size_available(void);
+extern bool qcom_scm_is_lmh_debug_read_buf_available(void);
+extern bool qcom_scm_is_lmh_debug_get_type_available(void);
+extern int qcom_scm_lmh_read_buf_size(int *size);
+extern int qcom_scm_lmh_debug_read(phys_addr_t payload, uint32_t size);
+extern int qcom_scm_lmh_debug_set_config_write(phys_addr_t payload,
+			int payload_size, uint32_t *buf, int buf_size);
+extern int qcom_scm_lmh_get_type(phys_addr_t payload, u64 payload_size,
+			u64 debug_type, uint32_t get_from, uint32_t *size);
 extern int qcom_scm_smmu_change_pgtbl_format(u64 dev_id, int cbndx);
 extern int qcom_scm_qsmmu500_wait_safe_toggle(bool en);
 extern int qcom_scm_smmu_notify_secure_lut(u64 dev_id, bool secure);
@@ -196,6 +206,23 @@ static inline int qcom_scm_delete_shm_bridge(u64 handle) { return -ENODEV; }
 static inline int qcom_scm_create_shm_bridge(u64 pfn_and_ns_perm_flags,
 			u64 ipfn_and_s_perm_flags, u64 size_and_flags,
 			u64 ns_vmids, u64 *handle) { return -ENODEV; }
+static inline bool qcom_scm_is_lmh_debug_set_available(void)
+			{ return -EINVAL; }
+static inline bool qcom_scm_is_lmh_debug_read_buf_size_available(void)
+			{ return -EINVAL; }
+static inline bool qcom_scm_is_lmh_debug_read_buf_available(void)
+			{ return -EINVAL; }
+static inline bool qcom_scm_is_lmh_debug_get_type_available(void)
+			{ return -EINVAL; }
+static inline int qcom_scm_lmh_read_buf_size(int *size) { return -ENODEV; }
+static inline int qcom_scm_lmh_debug_read(phys_addr_t payload, uint32_t size)
+			{ return -ENODEV; }
+static inline int qcom_scm_lmh_debug_set_config_write(phys_addr_t payload,
+			int payload_size, uint32_t *buf, int buf_size)
+			{ return -ENODEV; }
+static inline int qcom_scm_lmh_get_type(phys_addr_t payload, u64 payload_size,
+			u64 debug_type, uint32_t get_from, uint32_t *size)
+			{ return -ENODEV; }
 static inline  int qcom_scm_smmu_change_pgtbl_format(u64 dev_id, int cbndx)
 		{ return -ENODEV; }
 static inline int qcom_scm_qsmmu500_wait_safe_toggle(bool en)