drm/amd/display: fix warning: ‘update_dsc_caps’ and ‘apply_dsc_policy_for_stream’ defined but not used

Fixes gcc '-Wunused-function' warning:

‘update_dsc_caps’ and ‘apply_dsc_policy_for_stream’ are only used
if 'CONFIG_DRM_AMD_DC_DCN' is defined,

however, it's defined even if 'CONFIG_DRM_AMD_DC_DCN' is not defined.
Thus gcc will report following warning
if 'CONFIG_DRM_AMD_DC_DCN' is not defined:

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5572:13: warning:
‘apply_dsc_policy_for_stream’ defined but not used [-Wunused-function]

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5556:13: warning:
‘update_dsc_caps’ defined but not used [-Wunused-function]

Thus move the definition of ‘update_dsc_caps’ and
‘apply_dsc_policy_for_stream’ inside define macro to fix it.

Signed-off-by: Baokun Li <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: LiBaokun96

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -5543,19 +5543,18 @@ static void dm_enable_per_frame_crtc_master_sync(struct dc_state *context)
 	}
 }
 
+#if defined(CONFIG_DRM_AMD_DC_DCN)
 static void update_dsc_caps(struct amdgpu_dm_connector *aconnector,
 							struct dc_sink *sink, struct dc_stream_state *stream,
 							struct dsc_dec_dpcd_caps *dsc_caps)
 {
 	stream->timing.flags.DSC = 0;
 
 	if (aconnector->dc_link && sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT) {
-#if defined(CONFIG_DRM_AMD_DC_DCN)
 		dc_dsc_parse_dsc_dpcd(aconnector->dc_link->ctx->dc,
 				      aconnector->dc_link->dpcd_caps.dsc_caps.dsc_basic_caps.raw,
 				      aconnector->dc_link->dpcd_caps.dsc_caps.dsc_branch_decoder_caps.raw,
 				      dsc_caps);
-#endif
 	}
 }
 
@@ -5568,7 +5567,6 @@ static void apply_dsc_policy_for_stream(struct amdgpu_dm_connector *aconnector,
 
 	link_bandwidth_kbps = dc_link_bandwidth_kbps(aconnector->dc_link,
 							dc_link_get_link_cap(aconnector->dc_link));
-#if defined(CONFIG_DRM_AMD_DC_DCN)
 	/* Set DSC policy according to dsc_clock_en */
 	dc_dsc_policy_set_enable_dsc_when_not_needed(
 		aconnector->dsc_settings.dsc_force_enable == DSC_CLK_FORCE_ENABLE);
@@ -5599,8 +5597,8 @@ static void apply_dsc_policy_for_stream(struct amdgpu_dm_connector *aconnector,
 
 	if (stream->timing.flags.DSC && aconnector->dsc_settings.dsc_bits_per_pixel)
 		stream->timing.dsc_cfg.bits_per_pixel = aconnector->dsc_settings.dsc_bits_per_pixel;
-#endif
 }
+#endif
 
 static struct drm_display_mode *
 get_highest_refresh_rate_mode(struct amdgpu_dm_connector *aconnector,