From: Tao Date: Thu, 8 Feb 2018 21:04:25 +0000 (-0500) Subject: drm/amd/display: Set vsc pack revision when DPCD revision is >= 1.2 X-Git-Tag: android-x86-8.1-r1~1211^2~30^2~18 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=3b94a4007dcfd4ac5780cd3d8a2d99979c966073;p=android-x86%2Fkernel.git 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 --- 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; }