Commit 124155c0 authored by George Shen's avatar George Shen Committed by Alex Deucher
Browse files

drm/amd/display: Add w/a to disable DP dual mode on certain ports 



[Why]
Certain ports on DCN3.2 configs do not properly populate the BIOS
info table flag to indicate DP dual mode is unsupported.

[How]
Add a workaround to disable DP dual mode on the ports with the missing
BIOS info table flag.

Reviewed-by: default avatarMichael Strauss <Michael.Strauss@amd.com>
Acked-by: default avatarAlan Liu <HaoPing.Liu@amd.com>
Signed-off-by: default avatarGeorge Shen <george.shen@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 029c85ad

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

+1 −0
Original line number Diff line number Diff line
@@ -887,6 +887,7 @@ struct dc_debug_options { 
	bool override_odm_optimization;

	bool minimize_dispclk_using_odm;

	bool disable_subvp_high_refresh;

	bool disable_dp_plus_plus_wa;

};



struct gpu_info_soc_bounding_box_v1_0;

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c

+1 −0
Original line number Diff line number Diff line
@@ -729,6 +729,7 @@ static const struct dc_debug_options debug_defaults_drv = { 
	.disable_fpo_vactive = false,

	.disable_boot_optimizations = false,

	.disable_subvp_high_refresh = true,

	.disable_dp_plus_plus_wa = true,

};



static const struct dc_debug_options debug_defaults_diags = {

drivers/gpu/drm/amd/display/dc/link/link_detection.c

+4 −0
Original line number Diff line number Diff line
@@ -593,6 +593,10 @@ static bool detect_dp(struct dc_link *link, 
			/* DP SST branch */

			link->type = dc_connection_sst_branch;

	} else {

		if (link->dc->debug.disable_dp_plus_plus_wa &&

				link->link_enc->features.flags.bits.IS_UHBR20_CAPABLE)

			return false;



		/* DP passive dongles */

		sink_caps->signal = dp_passive_dongle_detection(link->ddc,

								sink_caps,