rtw89: extend subband for 6G band

Split 6G band into 8 sub-bands where indexes are from 0 to 7,
i.e. RTW89_CH_6G_BAND_IDX[0-7]. Then, decide subband by both
band and channel instead of just channel because conflicts
between 5G channels and 6G channels.

Moreover, add default case to the existing use of switch (subband).
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220211075953.40421-4-pkshih@realtek.com

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

@@ -293,19 +293,58 @@ static void rtw89_get_channel_params(struct cfg80211_chan_def *chandef,
 		break;
 	}
 
-	switch (center_chan) {
+	switch (band) {
 	default:
-	case 1 ... 14:
-		subband = RTW89_CH_2G;
-		break;
-	case 36 ... 64:
-		subband = RTW89_CH_5G_BAND_1;
+	case RTW89_BAND_2G:
+		switch (center_chan) {
+		default:
+		case 1 ... 14:
+			subband = RTW89_CH_2G;
+			break;
+		}
 		break;
-	case 100 ... 144:
-		subband = RTW89_CH_5G_BAND_3;
+	case RTW89_BAND_5G:
+		switch (center_chan) {
+		default:
+		case 36 ... 64:
+			subband = RTW89_CH_5G_BAND_1;
+			break;
+		case 100 ... 144:
+			subband = RTW89_CH_5G_BAND_3;
+			break;
+		case 149 ... 177:
+			subband = RTW89_CH_5G_BAND_4;
+			break;
+		}
 		break;
-	case 149 ... 177:
-		subband = RTW89_CH_5G_BAND_4;
+	case RTW89_BAND_6G:
+		switch (center_chan) {
+		default:
+		case 1 ... 29:
+			subband = RTW89_CH_6G_BAND_IDX0;
+			break;
+		case 33 ... 61:
+			subband = RTW89_CH_6G_BAND_IDX1;
+			break;
+		case 65 ... 93:
+			subband = RTW89_CH_6G_BAND_IDX2;
+			break;
+		case 97 ... 125:
+			subband = RTW89_CH_6G_BAND_IDX3;
+			break;
+		case 129 ... 157:
+			subband = RTW89_CH_6G_BAND_IDX4;
+			break;
+		case 161 ... 189:
+			subband = RTW89_CH_6G_BAND_IDX5;
+			break;
+		case 193 ... 221:
+			subband = RTW89_CH_6G_BAND_IDX6;
+			break;
+		case 225 ... 253:
+			subband = RTW89_CH_6G_BAND_IDX7;
+			break;
+		}
 		break;
 	}
 

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

@@ -61,6 +61,15 @@ enum rtw89_subband {
 	RTW89_CH_5G_BAND_3 = 3,
 	RTW89_CH_5G_BAND_4 = 4,
 
+	RTW89_CH_6G_BAND_IDX0, /* Low */
+	RTW89_CH_6G_BAND_IDX1, /* Low */
+	RTW89_CH_6G_BAND_IDX2, /* Mid */
+	RTW89_CH_6G_BAND_IDX3, /* Mid */
+	RTW89_CH_6G_BAND_IDX4, /* High */
+	RTW89_CH_6G_BAND_IDX5, /* High */
+	RTW89_CH_6G_BAND_IDX6, /* Ultra-high */
+	RTW89_CH_6G_BAND_IDX7, /* Ultra-high */
+
 	RTW89_SUBBAND_NR,
 };
 

drivers/net/wireless/realtek/rtw89/rtw8852a_rfk.c

@@ -2917,6 +2917,7 @@ static void _tssi_set_tmeter_tbl(struct rtw89_dev *rtwdev, enum rtw89_phy_idx ph
 	u8 i, j;
 
 	switch (subband) {
+	default:
 	case RTW89_CH_2G:
 		thm_up_a = rtw89_8852a_trk_cfg.delta_swingidx_2ga_p;
 		thm_down_a = rtw89_8852a_trk_cfg.delta_swingidx_2ga_n;
@@ -3101,6 +3102,7 @@ static void _tssi_pak(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy,
 	u8 subband = rtwdev->hal.current_subband;
 
 	switch (subband) {
+	default:
 	case RTW89_CH_2G:
 		rtw89_rfk_parser_by_cond(rtwdev, path == RF_PATH_A,
 					 &rtw8852a_tssi_pak_defs_a_2g_tbl,