From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Date: Thu, 7 Dec 2017 15:48:15 -0500
Subject: drm/amd/display: fix 180 full screen pipe split
Git-commit: 737ae4ea82180158571bd2d171fe5007dd7b74ee
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c |   14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -669,12 +669,6 @@ static void calculate_inits_and_adj_vp(s
 	if (pipe_ctx->plane_state->horizontal_mirror)
 		flip_horz_scan_dir = !flip_horz_scan_dir;
 
-	/* Temp W/A for rotated displays, ignore recout_skip */
-	if (flip_vert_scan_dir)
-		recout_skip->height = 0;
-	if (flip_horz_scan_dir)
-		recout_skip->width = 0;
-
 	if (pipe_ctx->plane_state->rotation == ROTATION_ANGLE_90 ||
 			pipe_ctx->plane_state->rotation == ROTATION_ANGLE_270) {
 		rect_swap_helper(&src);
@@ -738,7 +732,7 @@ static void calculate_inits_and_adj_vp(s
 	}
 
 	/* Adjust for non-0 viewport offset */
-	if (data->viewport.x) {
+	if (data->viewport.x && !flip_horz_scan_dir) {
 		int int_part;
 
 		data->inits.h = dal_fixed31_32_add(data->inits.h, dal_fixed31_32_mul_int(
@@ -759,7 +753,7 @@ static void calculate_inits_and_adj_vp(s
 		data->inits.h = dal_fixed31_32_add_int(data->inits.h, int_part);
 	}
 
-	if (data->viewport_c.x) {
+	if (data->viewport_c.x && !flip_horz_scan_dir) {
 		int int_part;
 
 		data->inits.h_c = dal_fixed31_32_add(data->inits.h_c, dal_fixed31_32_mul_int(
@@ -780,7 +774,7 @@ static void calculate_inits_and_adj_vp(s
 		data->inits.h_c = dal_fixed31_32_add_int(data->inits.h_c, int_part);
 	}
 
-	if (data->viewport.y) {
+	if (data->viewport.y && !flip_vert_scan_dir) {
 		int int_part;
 
 		data->inits.v = dal_fixed31_32_add(data->inits.v, dal_fixed31_32_mul_int(
@@ -801,7 +795,7 @@ static void calculate_inits_and_adj_vp(s
 		data->inits.v = dal_fixed31_32_add_int(data->inits.v, int_part);
 	}
 
-	if (data->viewport_c.y) {
+	if (data->viewport_c.y && !flip_vert_scan_dir) {
 		int int_part;
 
 		data->inits.v_c = dal_fixed31_32_add(data->inits.v_c, dal_fixed31_32_mul_int(