Commit 3b94a400 authored Feb 08, 2018 by Tao Committed by Alex Deucher Feb 19, 2018

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 <xtao@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent e923a355

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}