drm/amd/display: Add reg defs for DCN303

[WHY]
These registers are currently missing from the DCN303 header files
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: George Shen <George.Shen@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn303/dcn303_dccg.h

@@ -15,7 +15,11 @@
 	SR(DPPCLK_DTO_CTRL),\
 	DCCG_SRII(DTO_PARAM, DPPCLK, 0),\
 	DCCG_SRII(DTO_PARAM, DPPCLK, 1),\
-	SR(REFCLK_CNTL)
+	SR(REFCLK_CNTL),\
+	SR(DISPCLK_FREQ_CHANGE_CNTL),\
+	DCCG_SRII(PIXEL_RATE_CNTL, OTG, 0),\
+	DCCG_SRII(PIXEL_RATE_CNTL, OTG, 1)
+
 
 #define DCCG_MASK_SH_LIST_DCN3_03(mask_sh) \
 		DCCG_SFI(DPPCLK_DTO_CTRL, DTO_ENABLE, DPPCLK, 0, mask_sh),\
@@ -25,6 +29,18 @@
 		DCCG_SF(DPPCLK0_DTO_PARAM, DPPCLK0_DTO_PHASE, mask_sh),\
 		DCCG_SF(DPPCLK0_DTO_PARAM, DPPCLK0_DTO_MODULO, mask_sh),\
 		DCCG_SF(REFCLK_CNTL, REFCLK_CLOCK_EN, mask_sh),\
-		DCCG_SF(REFCLK_CNTL, REFCLK_SRC_SEL, mask_sh)
+		DCCG_SF(REFCLK_CNTL, REFCLK_SRC_SEL, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DISPCLK_STEP_DELAY, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DISPCLK_STEP_SIZE, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DISPCLK_FREQ_RAMP_DONE, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DISPCLK_MAX_ERRDET_CYCLES, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DCCG_FIFO_ERRDET_RESET, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DCCG_FIFO_ERRDET_STATE, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DCCG_FIFO_ERRDET_OVR_EN, mask_sh),\
+		DCCG_SF(DISPCLK_FREQ_CHANGE_CNTL, DISPCLK_CHG_FWD_CORR_DISABLE, mask_sh),\
+		DCCG_SFII(OTG, PIXEL_RATE_CNTL, OTG, ADD_PIXEL, 0, mask_sh),\
+		DCCG_SFII(OTG, PIXEL_RATE_CNTL, OTG, ADD_PIXEL, 1, mask_sh),\
+		DCCG_SFII(OTG, PIXEL_RATE_CNTL, OTG, DROP_PIXEL, 0, mask_sh),\
+		DCCG_SFII(OTG, PIXEL_RATE_CNTL, OTG, DROP_PIXEL, 1, mask_sh)
 
 #endif //__DCN303_DCCG_H__