Revert "drm/radeon/kms: remove some pll algo flags"

This reverts commit f28488c282d8916b9b6190cc41714815bbaf97d5.

On my rv610 test machine the monitor failed to light up after this.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 037e3260cb7c..176f424975ac 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -501,9 +501,21 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
                     (rdev->family == CHIP_RS740))
                         pll->flags |= (/*RADEON_PLL_USE_FRAC_FB_DIV |*/
                                        RADEON_PLL_PREFER_CLOSEST_LOWER);
-        } else
+
+                if (ASIC_IS_DCE32(rdev) && mode->clock > 200000)        /* range limits??? */
+                        pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
+                else
+                        pll->flags |= RADEON_PLL_PREFER_LOW_REF_DIV;
+        } else {
                 pll->flags |= RADEON_PLL_LEGACY;
 
+                if (mode->clock > 200000)       /* range limits??? */
+                        pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
+                else
+                        pll->flags |= RADEON_PLL_PREFER_LOW_REF_DIV;
+
+        }
+
         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
                 if (encoder->crtc == crtc) {
                         radeon_encoder = to_radeon_encoder(encoder);