drm/amd/display: fix function scopes

This turns previously global functions into static, thus removing
compile-time warnings such as:

 warning: no previous prototype for 'get_highest_allowed_voltage_level'
 [-Wmissing-prototypes]
 742 | unsigned int get_highest_allowed_voltage_level(uint32_t chip_family, uint32_t hw_internal_rev, uint32_t pci_revision_id)
     |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 warning: no previous prototype for 'rv1_vbios_smu_send_msg_with_param'
 [-Wmissing-prototypes]
 102 | int rv1_vbios_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr, unsigned int msg_id, unsigned int param)
     |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Changes since v1:
- As suggested by Rodrigo Siqueira:
  1. Rewrite function signatures to make them more readable.
  2. Get rid of unused functions in order to remove 'defined but not
     used' warnings.

Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Isabella Basso <isabbasso@riseup.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

4 files changed, 8 insertions, 8 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c
index 815481a3ef54..ea4f8e06b07c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c
@@ -462,7 +462,7 @@ void dccg31_set_physymclk(
 }
 
 /* Controls the generation of pixel valid for OTG in (OTG -> HPO case) */
-void dccg31_set_dtbclk_dto(
+static void dccg31_set_dtbclk_dto(
 		struct dccg *dccg,
 		int dtbclk_inst,
 		int req_dtbclk_khz,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c
index 80bb09db5e4c..71c359f9cdd2 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dio_link_encoder.c
@@ -174,7 +174,7 @@ void dcn31_link_encoder_set_dio_phy_mux(
 	}
 }
 
-void enc31_hw_init(struct link_encoder *enc)
+static void enc31_hw_init(struct link_encoder *enc)
 {
 	struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c
index 3b3721386571..83ece02380a8 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_panel_cntl.c
@@ -65,7 +65,7 @@ static uint32_t dcn31_get_16_bit_backlight_from_pwm(struct panel_cntl *panel_cnt
 	return cmd.panel_cntl.data.current_backlight;
 }
 
-uint32_t dcn31_panel_cntl_hw_init(struct panel_cntl *panel_cntl)
+static uint32_t dcn31_panel_cntl_hw_init(struct panel_cntl *panel_cntl)
 {
 	struct dcn31_panel_cntl *dcn31_panel_cntl = TO_DCN31_PANEL_CNTL(panel_cntl);
 	struct dc_dmub_srv *dc_dmub_srv = panel_cntl->ctx->dmub_srv;
@@ -96,7 +96,7 @@ uint32_t dcn31_panel_cntl_hw_init(struct panel_cntl *panel_cntl)
 	return cmd.panel_cntl.data.current_backlight;
 }
 
-void dcn31_panel_cntl_destroy(struct panel_cntl **panel_cntl)
+static void dcn31_panel_cntl_destroy(struct panel_cntl **panel_cntl)
 {
 	struct dcn31_panel_cntl *dcn31_panel_cntl = TO_DCN31_PANEL_CNTL(*panel_cntl);
 
@@ -104,7 +104,7 @@ void dcn31_panel_cntl_destroy(struct panel_cntl **panel_cntl)
 	*panel_cntl = NULL;
 }
 
-bool dcn31_is_panel_backlight_on(struct panel_cntl *panel_cntl)
+static bool dcn31_is_panel_backlight_on(struct panel_cntl *panel_cntl)
 {
 	union dmub_rb_cmd cmd;
 
@@ -114,7 +114,7 @@ bool dcn31_is_panel_backlight_on(struct panel_cntl *panel_cntl)
 	return cmd.panel_cntl.data.is_backlight_on;
 }
 
-bool dcn31_is_panel_powered_on(struct panel_cntl *panel_cntl)
+static bool dcn31_is_panel_powered_on(struct panel_cntl *panel_cntl)
 {
 	union dmub_rb_cmd cmd;
 
@@ -124,7 +124,7 @@ bool dcn31_is_panel_powered_on(struct panel_cntl *panel_cntl)
 	return cmd.panel_cntl.data.is_powered_on;
 }
 
-void dcn31_store_backlight_level(struct panel_cntl *panel_cntl)
+static void dcn31_store_backlight_level(struct panel_cntl *panel_cntl)
 {
 	union dmub_rb_cmd cmd;
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
index 3a35f0416ef7..ff93f2956eb9 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
@@ -1272,7 +1272,7 @@ static struct link_encoder *dcn31_link_enc_create_minimal(
 	return &enc20->enc10.base;
 }
 
-struct panel_cntl *dcn31_panel_cntl_create(const struct panel_cntl_init_data *init_data)
+static struct panel_cntl *dcn31_panel_cntl_create(const struct panel_cntl_init_data *init_data)
 {
 	struct dcn31_panel_cntl *panel_cntl =
 		kzalloc(sizeof(struct dcn31_panel_cntl), GFP_KERNEL);