rtw88: debug: dump tx power indexes in use

Add a read entry in debugfs to dump current tx power
indexes in use for each path and each rate section.
The corresponding power bases, power by rate, and
power limit are also included.

Also this patch fixes unused function warning.

Fixes: b7414222 ("rtw88: refine flow to get tx power index")
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtw88/debug.c

@@ -8,6 +8,7 @@
 #include "sec.h"
 #include "fw.h"
 #include "debug.h"
+#include "phy.h"
 
 #ifdef CONFIG_RTW88_DEBUGFS
 
@@ -460,6 +461,112 @@ static int rtw_debug_get_rf_dump(struct seq_file *m, void *v)
 	return 0;
 }
 
+static void rtw_print_cck_rate_txt(struct seq_file *m, u8 rate)
+{
+	static const char * const
+	cck_rate[] = {"1M", "2M", "5.5M", "11M"};
+	u8 idx = rate - DESC_RATE1M;
+
+	seq_printf(m, " CCK_%-5s", cck_rate[idx]);
+}
+
+static void rtw_print_ofdm_rate_txt(struct seq_file *m, u8 rate)
+{
+	static const char * const
+	ofdm_rate[] = {"6M", "9M", "12M", "18M", "24M", "36M", "48M", "54M"};
+	u8 idx = rate - DESC_RATE6M;
+
+	seq_printf(m, " OFDM_%-4s", ofdm_rate[idx]);
+}
+
+static void rtw_print_ht_rate_txt(struct seq_file *m, u8 rate)
+{
+	u8 mcs_n = rate - DESC_RATEMCS0;
+
+	seq_printf(m, " MCS%-6u", mcs_n);
+}
+
+static void rtw_print_vht_rate_txt(struct seq_file *m, u8 rate)
+{
+	u8 idx = rate - DESC_RATEVHT1SS_MCS0;
+	u8 n_ss, mcs_n;
+
+	/* n spatial stream */
+	n_ss = 1 + idx / 10;
+	/* MCS n */
+	mcs_n = idx % 10;
+	seq_printf(m, " VHT%uSMCS%u", n_ss, mcs_n);
+}
+
+static int rtw_debugfs_get_tx_pwr_tbl(struct seq_file *m, void *v)
+{
+	struct rtw_debugfs_priv *debugfs_priv = m->private;
+	struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+	struct rtw_hal *hal = &rtwdev->hal;
+	void (*print_rate)(struct seq_file *, u8) = NULL;
+	u8 path, rate;
+	struct rtw_power_params pwr_param = {0};
+	u8 bw = hal->current_band_width;
+	u8 ch = hal->current_channel;
+	u8 regd = rtwdev->regd.txpwr_regd;
+
+	seq_printf(m, "%-4s %-10s %-3s%6s %-4s %4s (%-4s %-4s)\n",
+		   "path", "rate", "pwr", "", "base", "", "byr", "lmt");
+
+	mutex_lock(&hal->tx_power_mutex);
+	for (path = RF_PATH_A; path <= RF_PATH_B; path++) {
+		/* there is no CCK rates used in 5G */
+		if (hal->current_band_type == RTW_BAND_5G)
+			rate = DESC_RATE6M;
+		else
+			rate = DESC_RATE1M;
+
+		/* now, not support vht 3ss and vht 4ss*/
+		for (; rate <= DESC_RATEVHT2SS_MCS9; rate++) {
+			/* now, not support ht 3ss and ht 4ss*/
+			if (rate > DESC_RATEMCS15 &&
+			    rate < DESC_RATEVHT1SS_MCS0)
+				continue;
+
+			switch (rate) {
+			case DESC_RATE1M...DESC_RATE11M:
+				print_rate = rtw_print_cck_rate_txt;
+				break;
+			case DESC_RATE6M...DESC_RATE54M:
+				print_rate = rtw_print_ofdm_rate_txt;
+				break;
+			case DESC_RATEMCS0...DESC_RATEMCS15:
+				print_rate = rtw_print_ht_rate_txt;
+				break;
+			case DESC_RATEVHT1SS_MCS0...DESC_RATEVHT2SS_MCS9:
+				print_rate = rtw_print_vht_rate_txt;
+				break;
+			default:
+				print_rate = NULL;
+				break;
+			}
+
+			rtw_get_tx_power_params(rtwdev, path, rate, bw,
+						ch, regd, &pwr_param);
+
+			seq_printf(m, "%4c ", path + 'A');
+			if (print_rate)
+				print_rate(m, rate);
+			seq_printf(m, " %3u(0x%02x) %4u %4d (%4d %4d)\n",
+				   hal->tx_pwr_tbl[path][rate],
+				   hal->tx_pwr_tbl[path][rate],
+				   pwr_param.pwr_base,
+				   min_t(s8, pwr_param.pwr_offset,
+					 pwr_param.pwr_limit),
+				   pwr_param.pwr_offset, pwr_param.pwr_limit);
+		}
+	}
+
+	mutex_unlock(&hal->tx_power_mutex);
+
+	return 0;
+}
+
 #define rtw_debug_impl_mac(page, addr)				\
 static struct rtw_debugfs_priv rtw_debug_priv_mac_ ##page = {	\
 	.cb_read = rtw_debug_get_mac_page,			\
@@ -514,6 +621,10 @@ static struct rtw_debugfs_priv rtw_debug_priv_rf_dump = {
 	.cb_read = rtw_debug_get_rf_dump,
 };
 
+static struct rtw_debugfs_priv rtw_debug_priv_tx_pwr_tbl = {
+	.cb_read = rtw_debugfs_get_tx_pwr_tbl,
+};
+
 static struct rtw_debugfs_priv rtw_debug_priv_write_reg = {
 	.cb_write = rtw_debugfs_set_write_reg,
 };
@@ -610,6 +721,7 @@ void rtw_debugfs_init(struct rtw_dev *rtwdev)
 		rtw_debugfs_add_r(bb_41);
 	}
 	rtw_debugfs_add_r(rf_dump);
+	rtw_debugfs_add_r(tx_pwr_tbl);
 }
 
 #endif /* CONFIG_RTW88_DEBUGFS */