[PATCH 58/77] drm/amd/display: Remove mpc from bios left over, keep double buffer disabled.

[Harry Wentland]

From: Yongqiang Sun <yongqiang.sun at amd.com>

Change-Id: Ife3ff042c9f70a6e8c08f0e5a395117de04eed14
Signed-off-by: Yongqiang Sun <yongqiang.sun at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c              | 10 +++++++++-
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c |  3 ---
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
index ce408ccb428e..082b39a65e6a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
@@ -127,10 +127,18 @@ static void mpc10_mpcc_remove(
 	for (z_idx = 0; z_idx < opp->mpc_tree.num_pipes; z_idx++)
 		if (opp->mpc_tree.dpp[z_idx] == dpp_id)
 			break;
+
 	if (z_idx == opp->mpc_tree.num_pipes) {
-		ASSERT(0);
+		/* In case of resume from S3/S4, remove mpcc from bios left over */
+		REG_SET(MPCC_OPP_ID[dpp_id], 0,
+				MPCC_OPP_ID, 0xf);
+		REG_SET(MPCC_TOP_SEL[dpp_id], 0,
+				MPCC_TOP_SEL, 0xf);
+		REG_SET(MPCC_BOT_SEL[dpp_id], 0,
+				MPCC_BOT_SEL, 0xf);
 		return;
 	}
+
 	mpcc_id = opp->mpc_tree.mpcc[z_idx];
 
 	REG_SET(MPCC_OPP_ID[mpcc_id], 0,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
index cc58f43400d7..6a5f2683c2e5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
@@ -289,9 +289,6 @@ static void tgn10_unblank_crtc(struct timing_generator *tg)
 {
 	struct dcn10_timing_generator *tgn10 = DCN10TG_FROM_TG(tg);
 
-	REG_UPDATE(OTG_DOUBLE_BUFFER_CONTROL,
-			OTG_BLANK_DATA_DOUBLE_BUFFER_EN, 1);
-
 	REG_UPDATE_2(OTG_BLANK_CONTROL,
 			OTG_BLANK_DATA_EN, 0,
 			OTG_BLANK_DE_MODE, 0);
-- 
2.11.0