diff --git a/src/atombios_output.c b/src/atombios_output.c
index eb52f5c..a78bcdb 100644
--- a/src/atombios_output.c
+++ b/src/atombios_output.c
@@ -619,6 +619,8 @@ atombios_output_scaler_setup(xf86OutputPtr output, DisplayModePtr mode)
     ENABLE_SCALER_PS_ALLOCATION disp_data;
     AtomBiosArgRec data;
     unsigned char *space;
+    unsigned int saveDataFormat;
+    unsigned char *RADEONMMIO = info->MMIO;
 
     memset(&disp_data, 0, sizeof(disp_data));
 
@@ -672,10 +674,13 @@ atombios_output_scaler_setup(xf86OutputPtr output, DisplayModePtr mode)
     data.exec.dataSpace = (void *)&space;
     data.exec.pspace = &disp_data;
 
+    saveDataFormat = INREG(AVIVO_D1MODE_DATA_FORMAT);
     if (RHDAtomBiosFunc(info->atomBIOS->scrnIndex, info->atomBIOS, ATOMBIOS_EXEC, &data) == ATOM_SUCCESS) {
+        OUTREG(AVIVO_D1MODE_DATA_FORMAT,saveDataFormat);
 	ErrorF("scaler %d setup success\n", radeon_crtc->crtc_id);
 	return ATOM_SUCCESS;
     }
+    OUTREG(AVIVO_D1MODE_DATA_FORMAT,saveDataFormat);
 
     ErrorF("scaler %d setup failed\n", radeon_crtc->crtc_id);
     return ATOM_NOT_IMPLEMENTED;