diff --git a/drivers/platform/tegra/dce/dce-ast.c b/drivers/platform/tegra/dce/dce-ast.c
index 830f2456..de40c2c1 100644
--- a/drivers/platform/tegra/dce/dce-ast.c
+++ b/drivers/platform/tegra/dce/dce-ast.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2020, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2019-2023, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -386,7 +386,7 @@ static void (*const ast_master_addr_fn[MAX_NO_ASTS][MAX_AST_REGIONS])
  *
  * Ruturns 64 bit mask.
  */
-u64 dce_get_fw_ast_reg_mask(struct tegra_dce *d)
+static u64 dce_get_fw_ast_reg_mask(struct tegra_dce *d)
 {
 	struct dce_firmware *fw = d->fw_data;
 
diff --git a/drivers/platform/tegra/dce/dce-bootstrap.c b/drivers/platform/tegra/dce/dce-bootstrap.c
index 8a04a6f3..829f32d6 100644
--- a/drivers/platform/tegra/dce/dce-bootstrap.c
+++ b/drivers/platform/tegra/dce/dce-bootstrap.c
@@ -223,7 +223,7 @@ void dce_bootstrap_work_fn(struct tegra_dce *d)
  *
  * Return : Void
  */
-void dce_handle_irq_status(struct tegra_dce *d, u32 status)
+static void dce_handle_irq_status(struct tegra_dce *d, u32 status)
 {
 
 	if (status & DCE_IRQ_LOG_OVERFLOW)
@@ -274,7 +274,7 @@ void dce_handle_irq_status(struct tegra_dce *d, u32 status)
  *
  * Return : Void
  */
-void dce_bootstrap_handle_boot_status(struct tegra_dce *d, u32 status)
+static void dce_bootstrap_handle_boot_status(struct tegra_dce *d, u32 status)
 {
 	int ret = 0;
 	dce_mailbox_store_interface_status(d, status,
diff --git a/drivers/platform/tegra/dce/dce-client-ipc.c b/drivers/platform/tegra/dce/dce-client-ipc.c
index 66410163..c9faec2e 100644
--- a/drivers/platform/tegra/dce/dce-client-ipc.c
+++ b/drivers/platform/tegra/dce/dce-client-ipc.c
@@ -20,7 +20,7 @@
 #define DCE_CLIENT_IPC_HANDLE_INVALID 0U
 #define DCE_CLIENT_IPC_HANDLE_VALID ((u32)BIT(31))
 
-struct tegra_dce_client_ipc client_handles[DCE_CLIENT_IPC_TYPE_MAX];
+static struct tegra_dce_client_ipc client_handles[DCE_CLIENT_IPC_TYPE_MAX];
 
 static uint32_t dce_interface_type_map[DCE_CLIENT_IPC_TYPE_MAX] = {
 	[DCE_CLIENT_IPC_TYPE_CPU_RM] = DCE_IPC_TYPE_DISPRM,
@@ -63,7 +63,7 @@ out:
 	return valid;
 }
 
-struct tegra_dce_client_ipc *dce_client_ipc_lookup_handle(u32 handle)
+static struct tegra_dce_client_ipc *dce_client_ipc_lookup_handle(u32 handle)
 {
 	struct tegra_dce_client_ipc *cl = NULL;
 
diff --git a/drivers/platform/tegra/dce/dce-debug.c b/drivers/platform/tegra/dce/dce-debug.c
index f270ed9e..50c21270 100644
--- a/drivers/platform/tegra/dce/dce-debug.c
+++ b/drivers/platform/tegra/dce/dce-debug.c
@@ -621,7 +621,7 @@ void dce_remove_debug(struct tegra_dce *d)
 	d_dev->debugfs = NULL;
 }
 
-int dump_hsp_regs_show(struct seq_file *s, void *unused)
+static int dump_hsp_regs_show(struct seq_file *s, void *unused)
 {
 	u8 i = 0;
 	struct tegra_dce *d = s->private;
diff --git a/drivers/platform/tegra/dce/dce-ipc-signal.c b/drivers/platform/tegra/dce/dce-ipc-signal.c
index 3a53b2e6..88c7a242 100644
--- a/drivers/platform/tegra/dce/dce-ipc-signal.c
+++ b/drivers/platform/tegra/dce/dce-ipc-signal.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2019-2023, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -16,7 +16,7 @@
 #include <dce-util-common.h>
 #include <interface/dce-interface.h>
 
-struct dce_ipc_signal_instance *mb_signals[DCE_NUM_MBOX_REGS];
+static struct dce_ipc_signal_instance *mb_signals[DCE_NUM_MBOX_REGS];
 
 static void dce_ipc_mbox_notify(struct tegra_dce *d,
 		struct dce_ipc_signal_instance *s)
diff --git a/drivers/platform/tegra/dce/dce-ipc.c b/drivers/platform/tegra/dce/dce-ipc.c
index b61b04ed..9df58596 100644
--- a/drivers/platform/tegra/dce/dce-ipc.c
+++ b/drivers/platform/tegra/dce/dce-ipc.c
@@ -22,7 +22,7 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/dce_events.h>
 
-struct dce_ipc_channel ivc_channels[DCE_IPC_CH_KMD_TYPE_MAX] = {
+static struct dce_ipc_channel ivc_channels[DCE_IPC_CH_KMD_TYPE_MAX] = {
 	[DCE_IPC_CH_KMD_TYPE_ADMIN] = {
 		.flags = DCE_IPC_CHANNEL_VALID
 			 | DCE_IPC_CHANNEL_MSG_HEADER,
diff --git a/drivers/platform/tegra/dce/dce-module.c b/drivers/platform/tegra/dce/dce-module.c
index 1931c3ae..5e80a427 100644
--- a/drivers/platform/tegra/dce/dce-module.c
+++ b/drivers/platform/tegra/dce/dce-module.c
@@ -301,7 +301,7 @@ static int dce_pm_resume(struct device *dev)
 	return dce_pm_exit_sc7(d);
 }
 
-const struct dev_pm_ops dce_pm_ops = {
+static const struct dev_pm_ops dce_pm_ops = {
 	.suspend = dce_pm_suspend,
 	.resume  = dce_pm_resume,
 };
diff --git a/drivers/platform/tegra/dce/dce-util-common.c b/drivers/platform/tegra/dce/dce-util-common.c
index e2980b0e..0db7800f 100644
--- a/drivers/platform/tegra/dce/dce-util-common.c
+++ b/drivers/platform/tegra/dce/dce-util-common.c
@@ -117,7 +117,7 @@ bool dce_io_valid_reg(struct tegra_dce *d, u32 r)
 void *dce_kzalloc(struct tegra_dce *d, size_t size, bool dma_flag)
 {
 	void *alloc;
-	u32 flags = GFP_KERNEL;
+	gfp_t flags = GFP_KERNEL;
 
 	if (dma_flag)
 		flags |= __GFP_DMA;
@@ -628,7 +628,7 @@ void dce_schedule_work(struct dce_work_struct *work)
  *
  * Return : void
  */
-void dce_work_handle_fn(struct work_struct *work)
+static void dce_work_handle_fn(struct work_struct *work)
 {
 	struct dce_work_struct *dce_work = container_of(work,
 							struct dce_work_struct,