#endif
 #include "core_types.h"
 #include "dc_types.h"
-
+#include "dal_asic_id.h"
 
 #define TO_DCE_CLOCKS(clocks)\
        container_of(clocks, struct dce_disp_clk, base)
        /*VBIOS will determine DPREFCLK frequency, so we don't set it*/
        dce_clk_params.target_clock_frequency = 0;
        dce_clk_params.clock_type = DCECLOCK_TYPE_DPREFCLK;
+#ifndef CONFIG_DRM_AMD_DC_VG20
        dce_clk_params.flags.USE_GENLOCK_AS_SOURCE_FOR_DPREFCLK =
                        (dce_clk_params.pll_id ==
                                        CLOCK_SOURCE_COMBO_DISPLAY_PLL0);
+#else
+       if (!ASICREV_IS_VEGA20_P(clk->ctx->asic_id.hw_internal_rev))
+               dce_clk_params.flags.USE_GENLOCK_AS_SOURCE_FOR_DPREFCLK =
+                       (dce_clk_params.pll_id ==
+                                       CLOCK_SOURCE_COMBO_DISPLAY_PLL0);
+       else
+               dce_clk_params.flags.USE_GENLOCK_AS_SOURCE_FOR_DPREFCLK = false;
+#endif
 
        bp->funcs->set_dce_clock(bp, &dce_clk_params);
 
 
        ((rev >= STONEY_A0) && (rev < CZ_UNKNOWN))
 
 /* DCE12 */
+#define AI_UNKNOWN 0xFF
+
+#ifdef CONFIG_DRM_AMD_DC_VG20
+#define AI_VEGA20_P_A0 40
+#define ASICREV_IS_VEGA20_P(eChipRev) ((eChipRev >= AI_VEGA20_P_A0) && (eChipRev < AI_UNKNOWN))
+#endif
 
 #define AI_GREENLAND_P_A0 1
 #define AI_GREENLAND_P_A1 2