drm/amd/display: Add interface to get Calibrated Avg Level from FIFO

[WHY]
Hardware has handed down a new sequence requiring the value of this
register be read from clk_mgr.

Signed-off-by: Wesley Chalmers <[e-mail]>
Reviewed-by: Dmytro Laktyushkin <[e-mail]>
Acked-by: Anson Jacob <[e-mail]>
Tested-by: Daniel Wheeler <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h

···
 	SRI(AFMT_60958_1, DIG, id), \
 	SRI(AFMT_60958_2, DIG, id), \
 	SRI(DIG_FE_CNTL, DIG, id), \
+	SRI(DIG_FIFO_STATUS, DIG, id), \
 	SRI(HDMI_CONTROL, DIG, id), \
 	SRI(HDMI_DB_CONTROL, DIG, id), \
 	SRI(HDMI_GC, DIG, id), \
···
 	uint32_t AFMT_60958_2;
 	uint32_t DIG_FE_CNTL;
 	uint32_t DIG_FE_CNTL2;
+	uint32_t DIG_FIFO_STATUS;
 	uint32_t DP_MSE_RATE_CNTL;
 	uint32_t DP_MSE_RATE_UPDATE;
 	uint32_t DP_PIXEL_FORMAT;
···
 	SE_SF(DIG0_DIG_FE_CNTL, TMDS_COLOR_FORMAT, mask_sh),\
 	SE_SF(DIG0_DIG_FE_CNTL, DIG_STEREOSYNC_SELECT, mask_sh),\
 	SE_SF(DIG0_DIG_FE_CNTL, DIG_STEREOSYNC_GATE_EN, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_LEVEL_ERROR, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_USE_OVERWRITE_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_OVERWRITE_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_ERROR_ACK, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_CAL_AVERAGE_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_MAXIMUM_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_MINIMUM_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_READ_CLOCK_SRC, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_CALIBRATED, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_FORCE_RECAL_AVERAGE, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_FORCE_RECOMP_MINMAX, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL, AFMT_GENERIC_LOCK_STATUS, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL, AFMT_GENERIC_CONFLICT, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL, AFMT_GENERIC_CONFLICT_CLR, mask_sh),\
···
 	type DP_VID_N_MUL;\
 	type DP_VID_M_DOUBLE_VALUE_EN;\
 	type DIG_SOURCE_SELECT;\
+	type DIG_FIFO_LEVEL_ERROR;\
+	type DIG_FIFO_USE_OVERWRITE_LEVEL;\
+	type DIG_FIFO_OVERWRITE_LEVEL;\
+	type DIG_FIFO_ERROR_ACK;\
+	type DIG_FIFO_CAL_AVERAGE_LEVEL;\
+	type DIG_FIFO_MAXIMUM_LEVEL;\
+	type DIG_FIFO_MINIMUM_LEVEL;\
+	type DIG_FIFO_READ_CLOCK_SRC;\
+	type DIG_FIFO_CALIBRATED;\
+	type DIG_FIFO_FORCE_RECAL_AVERAGE;\
+	type DIG_FIFO_FORCE_RECOMP_MINMAX;\
 	type DIG_CLOCK_PATTERN
 
 #define SE_REG_FIELD_LIST_DCN2_0(type) \

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c

···
 		DP_SST_SDP_SPLITTING, enable_sdp_splitting);
 }
 
+uint32_t enc2_get_fifo_cal_average_level(
+		struct stream_encoder *enc)
+{
+	struct dcn10_stream_encoder *enc1 = DCN10STRENC_FROM_STRENC(enc);
+	uint32_t fifo_level;
+
+	REG_GET(DIG_FIFO_STATUS,
+			DIG_FIFO_CAL_AVERAGE_LEVEL, &fifo_level);
+	return fifo_level;
+}
+
 static const struct stream_encoder_funcs dcn20_str_enc_funcs = {
 	.dp_set_odm_combine =
 		enc2_dp_set_odm_combine,
···
 	.dp_set_dsc_pps_info_packet = enc2_dp_set_dsc_pps_info_packet,
 	.set_dynamic_metadata = enc2_set_dynamic_metadata,
 	.hdmi_reset_stream_attribute = enc1_reset_hdmi_stream_attribute,
+	.get_fifo_cal_average_level = enc2_get_fifo_cal_average_level,
 };
 
 void dcn20_stream_encoder_construct(

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.h

···
 		uint32_t hubp_requestor_id,
 		enum dynamic_metadata_mode dmdata_mode);
 
+uint32_t enc2_get_fifo_cal_average_level(
+		struct stream_encoder *enc);
+
 #endif /* __DC_STREAM_ENCODER_DCN20_H__ */

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_stream_encoder.c

···
 	.dp_set_dsc_pps_info_packet = enc3_dp_set_dsc_pps_info_packet,
 	.set_dynamic_metadata = enc2_set_dynamic_metadata,
 	.hdmi_reset_stream_attribute = enc1_reset_hdmi_stream_attribute,
+
+	.get_fifo_cal_average_level = enc2_get_fifo_cal_average_level,
 };
 
 void dcn30_dio_stream_encoder_construct(

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_stream_encoder.h

···
 	SRI(DP_SEC_METADATA_TRANSMISSION, DP, id), \
 	SRI(HDMI_METADATA_PACKET_CONTROL, DIG, id), \
 	SRI(DIG_FE_CNTL, DIG, id), \
+	SRI(DIG_FIFO_STATUS, DIG, id), \
 	SRI(DIG_CLOCK_PATTERN, DIG, id)
 
 
···
 	SE_SF(DIG0_DIG_FE_CNTL, TMDS_COLOR_FORMAT, mask_sh),\
 	SE_SF(DIG0_DIG_FE_CNTL, DIG_STEREOSYNC_SELECT, mask_sh),\
 	SE_SF(DIG0_DIG_FE_CNTL, DIG_STEREOSYNC_GATE_EN, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_LEVEL_ERROR, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_USE_OVERWRITE_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_OVERWRITE_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_ERROR_ACK, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_CAL_AVERAGE_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_MAXIMUM_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_MINIMUM_LEVEL, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_READ_CLOCK_SRC, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_CALIBRATED, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_FORCE_RECAL_AVERAGE, mask_sh),\
+	SE_SF(DIG0_DIG_FIFO_STATUS, DIG_FIFO_FORCE_RECOMP_MINMAX, mask_sh),\
 	SE_SF(DP0_DP_SEC_CNTL, DP_SEC_GSP4_ENABLE, mask_sh),\
 	SE_SF(DP0_DP_SEC_CNTL, DP_SEC_GSP5_ENABLE, mask_sh),\
 	SE_SF(DP0_DP_SEC_CNTL, DP_SEC_GSP6_ENABLE, mask_sh),\

drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h

···
 	void (*dp_set_odm_combine)(
 		struct stream_encoder *enc,
 		bool odm_combine);
+
+	uint32_t (*get_fifo_cal_average_level)(
+		struct stream_encoder *enc);
 };
 
 #endif /* STREAM_ENCODER_H_ */

drivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_0_1_sh_mask.h

···
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_OVERWRITE_LEVEL_MASK                                                   0x000000FCL
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_ERROR_ACK_MASK                                                         0x00000100L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_CAL_AVERAGE_LEVEL_MASK                                                 0x0000FC00L
+#define DIG0_DIG_FIFO_STATUS__DIG_FIFO_MAXIMUM_LEVEL_MASK                                                     0x001F0000L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_MINIMUM_LEVEL_MASK                                                     0x03C00000L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_READ_CLOCK_SRC_MASK                                                    0x04000000L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_CALIBRATED_MASK                                                        0x20000000L
···
 #define DIG3_DIG_FIFO_STATUS__DIG_FIFO_OVERWRITE_LEVEL__SHIFT                                                 0x2
 #define DIG3_DIG_FIFO_STATUS__DIG_FIFO_ERROR_ACK__SHIFT                                                       0x8
 #define DIG3_DIG_FIFO_STATUS__DIG_FIFO_CAL_AVERAGE_LEVEL__SHIFT                                               0xa
+#define DIG0_DIG_FIFO_STATUS__DIG_FIFO_MAXIMUM_LEVEL__SHIFT                                                   0x10
 #define DIG3_DIG_FIFO_STATUS__DIG_FIFO_MINIMUM_LEVEL__SHIFT                                                   0x16
 #define DIG3_DIG_FIFO_STATUS__DIG_FIFO_READ_CLOCK_SRC__SHIFT                                                  0x1a
 #define DIG3_DIG_FIFO_STATUS__DIG_FIFO_CALIBRATED__SHIFT                                                      0x1d

drivers/gpu/drm/amd/include/asic_reg/dcn/dcn_3_1_2_sh_mask.h

···
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_OVERWRITE_LEVEL__SHIFT                                                 0x2
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_ERROR_ACK__SHIFT                                                       0x8
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_CAL_AVERAGE_LEVEL__SHIFT                                               0xa
+#define DIG0_DIG_FIFO_STATUS__DIG_FIFO_MAXIMUM_LEVEL__SHIFT                                                   0x10
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_MINIMUM_LEVEL__SHIFT                                                   0x16
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_READ_CLOCK_SRC__SHIFT                                                  0x1a
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_CALIBRATED__SHIFT                                                      0x1d
···
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_OVERWRITE_LEVEL_MASK                                                   0x000000FCL
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_ERROR_ACK_MASK                                                         0x00000100L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_CAL_AVERAGE_LEVEL_MASK                                                 0x0000FC00L
+#define DIG0_DIG_FIFO_STATUS__DIG_FIFO_MAXIMUM_LEVEL_MASK                                                     0x001F0000L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_MINIMUM_LEVEL_MASK                                                     0x03C00000L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_READ_CLOCK_SRC_MASK                                                    0x04000000L
 #define DIG0_DIG_FIFO_STATUS__DIG_FIFO_CALIBRATED_MASK                                                        0x20000000L