drm/amd/display: add debug option to bypass ssinfo from bios.

[Why&How]
add debug option to bypass ssinfo from bios.
Reviewed-by: Chris Park <Chris.Park@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/clk_mgr/dce100/dce_clk_mgr.c

@@ -374,6 +374,8 @@ void dce_clock_read_ss_info(struct clk_mgr_internal *clk_mgr_dce)
 				clk_mgr_dce->dprefclk_ss_percentage =
 						info.spread_spectrum_percentage;
 			}
+			if (clk_mgr_dce->base.ctx->dc->debug.ignore_dpref_ss)
+				clk_mgr_dce->dprefclk_ss_percentage = 0;
 		}
 	}
 }

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c

@@ -697,6 +697,8 @@ void dcn31_clk_mgr_construct(
 	clk_mgr->base.base.dprefclk_khz = 600000;
 	clk_mgr->base.dccg->ref_dtbclk_khz = 600000;
 	dce_clock_read_ss_info(&clk_mgr->base);
+	/*if bios enabled SS, driver needs to adjust dtb clock, only enable with correct bios*/
+	//clk_mgr->base.dccg->ref_dtbclk_khz = dce_adjust_dp_ref_freq_for_ss(clk_mgr_internal, clk_mgr->base.base.dprefclk_khz);
 
 	clk_mgr->base.base.bw_params = &dcn31_bw_params;
 

drivers/gpu/drm/amd/display/dc/dc.h

@@ -709,6 +709,7 @@ struct dc_debug_options {
 	union dpia_debug_options dpia_debug;
 #endif
 	bool apply_vendor_specific_lttpr_wa;
+	bool ignore_dpref_ss;
 };
 
 struct gpu_info_soc_bounding_box_v1_0;