From 40eab0f8956724b0c2bb9e5679269632afb72b26 Mon Sep 17 00:00:00 2001
From: Christian König <christian.koenig@amd.com>
Date: Wed, 9 Sep 2020 13:12:46 +0200
Subject: [PATCH] drm/radeon: revert "Prefer lower feedback dividers"
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Git-commit: 0f3cd13d846105795de271ac64bb807df38513b7
No-fix: 5150dd85bdfa08143cacf1b4249121651bed3c35
Patch-mainline: v5.10-rc1
References: git-fixes
Turns out this breaks a lot of different hardware.
This reverts commit fc8c70526bd30733ea8667adb8b8ffebea30a8ed.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/radeon/radeon_display.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 7b69d6dfe44a..e0ae911ef427 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -933,7 +933,7 @@ static void avivo_get_fb_ref_div(unsigned nom, unsigned den, unsigned post_div,
/* get matching reference and feedback divider */
*ref_div = min(max(den/post_div, 1u), ref_div_max);
- *fb_div = max(nom * *ref_div * post_div / den, 1u);
+ *fb_div = DIV_ROUND_CLOSEST(nom * *ref_div * post_div, den);
/* limit fb divider to its maximum */
if (*fb_div > fb_div_max) {
--
2.16.4