wifi: rtw89: 8852c: read RX gain offset from efuse for 6GHz channels

Read calibration values of RX gain offset from efuse, and set them to
registers to normalize RX gain for all hardware modules. Then, PHY dynamic
mechanism can get expected values to adjust hardware parameters to yield
expected performance.

Signed-off-by: Ping-Ke Shih <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Ping-Ke Shih

drivers/net/wireless/realtek/rtw89/core.h

@@ -104,6 +104,14 @@ enum rtw89_gain_offset {
 	RTW89_GAIN_OFFSET_5G_LOW,
 	RTW89_GAIN_OFFSET_5G_MID,
 	RTW89_GAIN_OFFSET_5G_HIGH,
+	RTW89_GAIN_OFFSET_6G_L0,
+	RTW89_GAIN_OFFSET_6G_L1,
+	RTW89_GAIN_OFFSET_6G_M0,
+	RTW89_GAIN_OFFSET_6G_M1,
+	RTW89_GAIN_OFFSET_6G_H0,
+	RTW89_GAIN_OFFSET_6G_H1,
+	RTW89_GAIN_OFFSET_6G_UH0,
+	RTW89_GAIN_OFFSET_6G_UH1,
 
 	RTW89_GAIN_OFFSET_NR,
 };

drivers/net/wireless/realtek/rtw89/phy.h

@@ -591,6 +591,22 @@ enum rtw89_gain_offset rtw89_subband_to_gain_offset_band_of_ofdm(enum rtw89_subb
 		return RTW89_GAIN_OFFSET_5G_MID;
 	case RTW89_CH_5G_BAND_4:
 		return RTW89_GAIN_OFFSET_5G_HIGH;
+	case RTW89_CH_6G_BAND_IDX0:
+		return RTW89_GAIN_OFFSET_6G_L0;
+	case RTW89_CH_6G_BAND_IDX1:
+		return RTW89_GAIN_OFFSET_6G_L1;
+	case RTW89_CH_6G_BAND_IDX2:
+		return RTW89_GAIN_OFFSET_6G_M0;
+	case RTW89_CH_6G_BAND_IDX3:
+		return RTW89_GAIN_OFFSET_6G_M1;
+	case RTW89_CH_6G_BAND_IDX4:
+		return RTW89_GAIN_OFFSET_6G_H0;
+	case RTW89_CH_6G_BAND_IDX5:
+		return RTW89_GAIN_OFFSET_6G_H1;
+	case RTW89_CH_6G_BAND_IDX6:
+		return RTW89_GAIN_OFFSET_6G_UH0;
+	case RTW89_CH_6G_BAND_IDX7:
+		return RTW89_GAIN_OFFSET_6G_UH1;
 	}
 }
 

drivers/net/wireless/realtek/rtw89/rtw8852c.c

@@ -426,6 +426,30 @@ static void rtw8852c_efuse_parsing_gain_offset(struct rtw89_dev *rtwdev,
 	valid |= _decode_efuse_gain(map->rx_gain_5g_high,
 				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_5G_HIGH],
 				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_5G_HIGH]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_l0,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_L0],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_L0]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_l1,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_L1],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_L1]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_m0,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_M0],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_M0]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_m1,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_M1],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_M1]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_h0,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_H0],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_H0]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_h1,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_H1],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_H1]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_uh0,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_UH0],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_UH0]);
+	valid |= _decode_efuse_gain(map->rx_gain_6g_uh1,
+				    &gain->offset[RF_PATH_A][RTW89_GAIN_OFFSET_6G_UH1],
+				    &gain->offset[RF_PATH_B][RTW89_GAIN_OFFSET_6G_UH1]);
 
 	gain->offset_valid = valid;
 }

drivers/net/wireless/realtek/rtw89/rtw8852c.h

@@ -73,9 +73,25 @@ struct rtw8852c_efuse {
 	u8 bw40_1s_tssi_6g_a[TSSI_MCS_6G_CH_GROUP_NUM];
 	u8 rsvd14[10];
 	u8 bw40_1s_tssi_6g_b[TSSI_MCS_6G_CH_GROUP_NUM];
-	u8 rsvd15[110];
+	u8 rsvd15[94];
+	u8 rx_gain_6g_l0;
+	u8 rsvd16;
+	u8 rx_gain_6g_l1;
+	u8 rsvd17;
+	u8 rx_gain_6g_m0;
+	u8 rsvd18;
+	u8 rx_gain_6g_m1;
+	u8 rsvd19;
+	u8 rx_gain_6g_h0;
+	u8 rsvd20;
+	u8 rx_gain_6g_h1;
+	u8 rsvd21;
+	u8 rx_gain_6g_uh0;
+	u8 rsvd22;
+	u8 rx_gain_6g_uh1;
+	u8 rsvd23;
 	u8 channel_plan_6g;
-	u8 rsvd16[71];
+	u8 rsvd24[71];
 	union {
 		struct rtw8852c_u_efuse u;
 		struct rtw8852c_e_efuse e;