From 3b94a4007dcfd4ac5780cd3d8a2d99979c966073 Mon Sep 17 00:00:00 2001 From: Tao Date: Thu, 8 Feb 2018 16:04:25 -0500 Subject: [PATCH] drm/amd/display: Set vsc pack revision when DPCD revision is >= 1.2 Brightness couldn't change when booting up in DC mode. It was because "psr_enabled" flag was not set to true before setting vsc packet revision, causing packet rev setup was skipped. Now instead of checking the psr flag, it checks if the DPCD_REV >= 1.2 and set the vsc packet revision. Signed-off-by: Tao Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c index a6f8c1f93693..ce0e9e76eb35 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -35,6 +35,7 @@ #include "core_types.h" #include "set_mode_types.h" #include "virtual/virtual_stream_encoder.h" +#include "dpcd_defs.h" #include "dce80/dce80_resource.h" #include "dce100/dce100_resource.h" @@ -2434,7 +2435,8 @@ static void set_vsc_info_packet( unsigned int vscPacketRevision = 0; unsigned int i; - if (stream->sink->link->psr_enabled) { + /*VSC packet set to 2 when DP revision >= 1.2*/ + if (stream->sink->link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) { vscPacketRevision = 2; } -- 2.30.2