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drm/amd/display: Set vsc pack revision when DPCD revision is >= 1.2

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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>
This commit is contained in:
Tao 2018-02-08 16:04:25 -05:00 committed by Alex Deucher
parent e923a355aa
commit 3b94a4007d
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
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@ -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;
}