From: Stylon Wang <stylon.wang@amd.com>
Date: Wed, 4 May 2022 10:09:44 +0000 (+0800)
Subject: Revert "drm/amd/display: Fix DCN3 B0 DP Alt Mapping"
X-Git-Tag: v5.18.6~141
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f4bfedc716c41f101d78ab700b6bc95301bcdbc2;p=thirdparty%2Fkernel%2Fstable.git

Revert "drm/amd/display: Fix DCN3 B0 DP Alt Mapping"

commit 1039188806d4cfdf9c412bb4ddb51b4d8cd15478 upstream.

This reverts commit 4b7786d87fb3adf3e534c4f1e4f824d8700b786b.

Commit 4b7786d87fb3 ("drm/amd/display: Fix DCN3 B0 DP Alt Mapping")
is causing 2nd USB-C display not lighting up.
Phy id remapping is done differently than is assumed in this
patch.

Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: "Limonciello, Mario" <Mario.Limonciello@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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 d71e625cc476e..559cf10831bea 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
@@ -1392,12 +1392,6 @@ static struct stream_encoder *dcn31_stream_encoder_create(
 		return NULL;
 	}
 
-	if (ctx->asic_id.chip_family == FAMILY_YELLOW_CARP &&
-			ctx->asic_id.hw_internal_rev == YELLOW_CARP_B0) {
-		if ((eng_id == ENGINE_ID_DIGC) || (eng_id == ENGINE_ID_DIGD))
-			eng_id = eng_id + 3; // For B0 only. C->F, D->G.
-	}
-
 	dcn30_dio_stream_encoder_construct(enc1, ctx, ctx->dc_bios,
 					eng_id, vpg, afmt,
 					&stream_enc_regs[eng_id],