drm/amd/display: Clear cached watermark after resume

[WHY]
Driver could skip program watermarks when resume from S0i3/S4.

[HOW]
Clear the cached one first to make sure new value gets applied.

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/hubbub/dcn35/dcn35_hubbub.c b/drivers/gpu/drm/amd/display/dc/hubbub/dcn35/dcn35_hubbub.c
index 6293173ba2b9d50bafe8d9fe11711ae020c66c14..5eb3da8d5206e91e595d03e4db96439cca9080bc 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hubbub/dcn35/dcn35_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/hubbub/dcn35/dcn35_hubbub.c
@@ -545,6 +545,7 @@ static void hubbub35_init(struct hubbub *hubbub)
                        DCHUBBUB_ARB_MAX_REQ_OUTSTAND, 256,
                        DCHUBBUB_ARB_MIN_REQ_OUTSTAND, 256);
 
+       memset(&hubbub2->watermarks.a.cstate_pstate, 0, sizeof(hubbub2->watermarks.a.cstate_pstate));
 }
 
 /*static void hubbub35_set_request_limit(struct hubbub *hubbub,