--- original/src/atombios_output.c	2008-09-18 11:15:37.000000000 -0700
+++ working/src/atombios_output.c	2008-09-22 12:42:39.000000000 -0700
@@ -620,7 +620,18 @@ dfp_disable_dither(xf86OutputPtr output,
 	break;
     /*case ATOM_DEVICE_LCD1_SUPPORT:*/ /* LVDS panels need dither enabled */
     case ATOM_DEVICE_DFP3_SUPPORT:
-	OUTREG(AVIVO_LVTMA_BIT_DEPTH_CONTROL, 0); /* LVTMA */
+        /* On DCE3 chips, the block layout changed */
+        if ((info->ChipFamily == CHIP_FAMILY_RV620) ||
+            (info->ChipFamily == CHIP_FAMILY_RV635) ||
+            (info->ChipFamily == CHIP_FAMILY_RS780) ||
+            (info->ChipFamily == CHIP_FAMILY_RV770)) {
+            /* Enable dithering for these chipsets */
+            long int val = (1 << 14) | (1 << 16) | (1 << 21) | (1 << 24);
+            OUTREG(0x6710, val);
+            OUTREG(0x6f10, val);
+        } else {
+            OUTREG(AVIVO_LVTMA_BIT_DEPTH_CONTROL, 0); /* LVTMA */
+        }
 	break;
     default:
 	break;
@@ -954,7 +965,12 @@ atombios_output_mode_set(xf86OutputPtr o
 		atombios_output_lvds_setup(output, adjusted_mode);
 		dfp_disable_dither(output, ATOM_DEVICE_LCD1_SUPPORT);
 	    }
-	}
+        } else if (radeon_output->devices & ATOM_DEVICE_DFP3_SUPPORT) {
+            atombios_output_dig2_setup(output, adjusted_mode);
+            atombios_output_dig2_transmitter_setup(output, adjusted_mode);
+            /* Fixme: Actually we're ENabling dithering here... */
+            dfp_disable_dither(output, ATOM_DEVICE_DFP3_SUPPORT);
+        }
     } else if ((radeon_output->MonType == MT_CTV) ||
 	       (radeon_output->MonType == MT_STV) ||
 	       (radeon_output->MonType == MT_CV)) {