From: Xingyue Tao <xingyue.tao@amd.com>
Date: Fri, 16 Feb 2018 16:29:13 -0500
Subject: drm/amd/display: add psr_version to stream
Git-commit: 85075fa04287dce81397dab75af0992274727b82
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Brightness could not be changed for some panels whose DPCD_version is below 1.2
Now psr_version is added into stream, and it copies from the displayTarget's psr_version.
It checks if the stream's psr_versio is non-zero and sets the vsc info packet revision now.

Signed-off-by: Xingyue Tao <xingyue.tao@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c |    2 +-
 drivers/gpu/drm/amd/display/dc/dc_stream.h        |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -2436,7 +2436,7 @@ static void set_vsc_info_packet(
 	unsigned int i;
 
 	/*VSC packet set to 2 when DP revision >= 1.2*/
-	if (stream->sink->link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) {
+	if (stream->psr_version != 0) {
 		vscPacketRevision = 2;
 	}
 
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -70,7 +70,8 @@ struct dc_stream_state {
 	bool ignore_msa_timing_param;
 	/* TODO: custom INFO packets */
 	/* TODO: ABM info (DMCU) */
-	/* TODO: PSR info */
+	/* PSR info */
+	unsigned char psr_version;
 	/* TODO: CEA VIC */
 
 	/* from core_stream struct */