From 6e298e0cbd6a975f57da8f98314dc41aeea7cbfb Mon Sep 17 00:00:00 2001
From: Wenjing Liu <wenjing.liu@amd.com>
Date: Mon, 13 Sep 2021 11:25:56 -0400
Subject: drm/amd/display: use correct vpg instance for 128b/132b encoding
Git-commit: b0d8889006037a7b5a52a9fdad78273406fa34ce
Patch-mainline: v5.16-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

[why]
128b/132b uses the vpg instance assigned to hpo dp stream encoder.
The current vpg used is assigned to dio stream encoder.
This is incorrect and cause display black screen because the
actual vpg is powered off.

Reviewed-by: Michael Strauss <michael.strauss@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 2bd38d19a447..cab7993b4cc5 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -3608,6 +3608,9 @@ void core_link_enable_stream(
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	enum otg_out_mux_dest otg_out_dest = OUT_MUX_DIO;
 	struct vpg *vpg = pipe_ctx->stream_res.stream_enc->vpg;
+
+	if (is_dp_128b_132b_signal(pipe_ctx))
+		vpg = pipe_ctx->stream_res.hpo_dp_stream_enc->vpg;
 #endif
 	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
 
@@ -3853,6 +3856,9 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx)
 	struct dc_link *link = stream->sink->link;
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	struct vpg *vpg = pipe_ctx->stream_res.stream_enc->vpg;
+
+	if (is_dp_128b_132b_signal(pipe_ctx))
+		vpg = pipe_ctx->stream_res.hpo_dp_stream_enc->vpg;
 #endif
 
 	if (!IS_DIAG_DC(dc->ctx->dce_environment) &&
-- 
2.38.1