From: jsg <jsg@openbsd.org>
Date: Mon, 5 Sep 2022 14:18:34 +0000 (+0000)
Subject: drm/amd/display: Fix pixel clock programming
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=66e557edcf3f61f3ec074db63282300cd3ef7c49;p=openbsd

drm/amd/display: Fix pixel clock programming

From Ilya Bakoulin
4df54c493e76f3cfa0bc8c54c5c43faa3b6e78d4 in linux 5.15.y/5.15.65
04fb918bf421b299feaee1006e82921d7d381f18 in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/dc/dce/dce_clock_source.c b/sys/dev/pci/drm/amd/display/dc/dce/dce_clock_source.c
index 74f8bc75cc6..157d050a536 100644
--- a/sys/dev/pci/drm/amd/display/dc/dce/dce_clock_source.c
+++ b/sys/dev/pci/drm/amd/display/dc/dce/dce_clock_source.c
@@ -545,9 +545,11 @@ static void dce112_get_pix_clk_dividers_helper (
 		switch (pix_clk_params->color_depth) {
 		case COLOR_DEPTH_101010:
 			actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 5) >> 2;
+			actual_pixel_clock_100hz -= actual_pixel_clock_100hz % 10;
 			break;
 		case COLOR_DEPTH_121212:
 			actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 6) >> 2;
+			actual_pixel_clock_100hz -= actual_pixel_clock_100hz % 10;
 			break;
 		case COLOR_DEPTH_161616:
 			actual_pixel_clock_100hz = actual_pixel_clock_100hz * 2;