drm/radeon: revert "Prefer lower feedback dividers"

Turns out this breaks a lot of different hardware.

This reverts commit 0dd1c382ad337a0ee1c5e478b912b647323942ae.

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>

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 7b69d6dfe44a37455ee73147f5f88d78fe409f17..e0ae911ef427dd028ad3c606dae0f1d61d1c7b7a 100644 (file)
--- 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) {