From: Logatharshan Thothiralingam <logatharshan.thothiralingam@amd.com>
Date: Thu, 9 Mar 2017 11:37:26 -0500
Subject: drm/amd/display: Fixed bandwidth calculation error when converting
 fractions
Git-commit: 1de8c33bbde4115561a5b2e684be7af66b3f085d
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

[Problem]
VSR greyed out

[Root cause]
When converting fractions, we were using the integer function, which let to
a large display clock and the view was not supported

[Solution]
Change the integer to fraction functions

Signed-off-by: Logatharshan Thothiralingam <logatharshan.thothiralingam@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
@@ -796,11 +796,11 @@ static void calculate_bandwidth(
 			}
 			else if (bw_leq(data->vsr[i], bw_int_to_fixed(1))) {
 				data->lb_lines_in_per_line_out_in_middle_of_frame[i] = bw_int_to_fixed(1);
-			}
-			else if (bw_leq(data->vsr[i], bw_int_to_fixed(4 / 3))) {
+			} else if (bw_leq(data->vsr[i],
+					bw_frc_to_fixed(4, 3))) {
 				data->lb_lines_in_per_line_out_in_middle_of_frame[i] = bw_div(bw_int_to_fixed(4), bw_int_to_fixed(3));
-			}
-			else if (bw_leq(data->vsr[i], bw_int_to_fixed(6 / 4))) {
+			} else if (bw_leq(data->vsr[i],
+					bw_frc_to_fixed(6, 4))) {
 				data->lb_lines_in_per_line_out_in_middle_of_frame[i] = bw_div(bw_int_to_fixed(6), bw_int_to_fixed(4));
 			}
 			else if (bw_leq(data->vsr[i], bw_int_to_fixed(2))) {