diff --git a/drivers/gpu/drm/amd/display/dc/bios/dce110/command_table_helper_dce110.c b/drivers/gpu/drm/amd/display/dc/bios/dce110/command_table_helper_dce110.c
index 8049320e8b035011beb4ceedf922f1d664a32895..ca24154468c73dd5abf7a9be147307a02cd1671f 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/dce110/command_table_helper_dce110.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/dce110/command_table_helper_dce110.c
@@ -358,7 +358,7 @@ static const struct command_table_helper command_table_helper_funcs = {
  * const struct command_table_helper **h - [out] struct of functions
  *
  */
-const struct command_table_helper *dal_cmd_tbl_helper_dce110_get_table()
+const struct command_table_helper *dal_cmd_tbl_helper_dce110_get_table(void)
 {
 	return &command_table_helper_funcs;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper2_dce112.c b/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper2_dce112.c
index d342cdecba114014da3d9e47797b06db8c915757..0237ae575068b1954c8c104e4c6274fd8654f876 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper2_dce112.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper2_dce112.c
@@ -412,7 +412,7 @@ static const struct command_table_helper command_table_helper_funcs = {
  * const struct command_table_helper **h - [out] struct of functions
  *
  */
-const struct command_table_helper *dal_cmd_tbl_helper_dce112_get_table2()
+const struct command_table_helper *dal_cmd_tbl_helper_dce112_get_table2(void)
 {
 	return &command_table_helper_funcs;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper_dce112.c b/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper_dce112.c
index 48e59963dad4d1e7e8255d85416acacc0aec2861..452034f83e4c880e85cd78c9349aa9fd0a7d88bf 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper_dce112.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/dce112/command_table_helper_dce112.c
@@ -412,7 +412,7 @@ static const struct command_table_helper command_table_helper_funcs = {
  * const struct command_table_helper **h - [out] struct of functions
  *
  */
-const struct command_table_helper *dal_cmd_tbl_helper_dce112_get_table()
+const struct command_table_helper *dal_cmd_tbl_helper_dce112_get_table(void)
 {
 	return &command_table_helper_funcs;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/bios/dce80/command_table_helper_dce80.c b/drivers/gpu/drm/amd/display/dc/bios/dce80/command_table_helper_dce80.c
index 295e16ef3f73a7c1aedf74895a7722b142758c9a..8b30b558cf1f6875da54713278b19c3e1c57b302 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/dce80/command_table_helper_dce80.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/dce80/command_table_helper_dce80.c
@@ -348,7 +348,7 @@ static const struct command_table_helper command_table_helper_funcs = {
 		dal_cmd_table_helper_encoder_mode_bp_to_atom,
 };
 
-const struct command_table_helper *dal_cmd_tbl_helper_dce80_get_table()
+const struct command_table_helper *dal_cmd_tbl_helper_dce80_get_table(void)
 {
 	return &command_table_helper_funcs;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_surface.c b/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
index 5aa2270f36fd5a9b5dfeaa25f4d316f17a61adbb..ade5b8ee9c3c0ead9272204360e9372208ba2b50 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
@@ -145,7 +145,7 @@ void dc_gamma_release(struct dc_gamma **gamma)
 	*gamma = NULL;
 }
 
-struct dc_gamma *dc_create_gamma()
+struct dc_gamma *dc_create_gamma(void)
 {
 	struct dc_gamma *gamma = kzalloc(sizeof(*gamma), GFP_KERNEL);
 
@@ -175,7 +175,7 @@ void dc_transfer_func_release(struct dc_transfer_func *tf)
 	kref_put(&tf->refcount, dc_transfer_func_free);
 }
 
-struct dc_transfer_func *dc_create_transfer_func()
+struct dc_transfer_func *dc_create_transfer_func(void)
 {
 	struct dc_transfer_func *tf = kzalloc(sizeof(*tf), GFP_KERNEL);