[PATCH 5.18 001/141] Revert "drm/amd/display: Fix DCN3 B0 DP Alt Mapping"

Greg Kroah-Hartman
2022-06-20T12:53:09Z

From: Stylon Wang <stylon.wang@amd.com>

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>
---
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c | 6 ------
1 file changed, 6 deletions(-)

--- 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_stre
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],