[PATCH wireless-next v2 1/4] wifi: rtw88: rtw8822c: convert DAC IQ buffers and signatures to s32

[Arsenii Pashchenko <ulijg308@gmail.com>]

Prepare the DAC IQ calibration path for signed math by converting the
temporary stack arrays 'iv' and 'qv' from u32 to s32. Update all
internal function signatures to accept s32 pointers.

To guarantee bisectability, wrap the existing unsigned logic in
temporary casts to u32. This maintains identical mathematical behavior
and avoids any compiler sign-compare warnings.

Signed-off-by: Arsenii Pashchenko <ulijg308@gmail.com>
---
 drivers/net/wireless/realtek/rtw88/rtw8822c.c | 49 +++++++++++--------
 1 file changed, 28 insertions(+), 21 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
index 244c80264..896e3e7b9 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
@@ -153,9 +153,12 @@ static void rtw8822c_dac_restore_reg(struct rtw_dev *rtwdev,
 	}
 }
 
-static void rtw8822c_rf_minmax_cmp(struct rtw_dev *rtwdev, u32 value,
-				   u32 *min, u32 *max)
+static void rtw8822c_rf_minmax_cmp(struct rtw_dev *rtwdev, s32 value_s32,
+				   s32 *min_s32, s32 *max_s32)
 {
+	u32 value = (u32)value_s32;
+	u32 *min = (u32 *)min_s32;
+	u32 *max = (u32 *)max_s32;
 	if (value >= 0x200) {
 		if (*min >= 0x200) {
 			if (*min > value)
@@ -182,8 +185,10 @@ static void rtw8822c_rf_minmax_cmp(struct rtw_dev *rtwdev, u32 value,
 	}
 }
 
-static void __rtw8822c_dac_iq_sort(struct rtw_dev *rtwdev, u32 *v1, u32 *v2)
+static void __rtw8822c_dac_iq_sort(struct rtw_dev *rtwdev, s32 *v1_s32, s32 *v2_s32)
 {
+	u32 *v1 = (u32 *)v1_s32;
+	u32 *v2 = (u32 *)v2_s32;
 	if (*v1 >= 0x200 && *v2 >= 0x200) {
 		if (*v1 > *v2)
 			swap(*v1, *v2);
@@ -195,7 +200,7 @@ static void __rtw8822c_dac_iq_sort(struct rtw_dev *rtwdev, u32 *v1, u32 *v2)
 	}
 }
 
-static void rtw8822c_dac_iq_sort(struct rtw_dev *rtwdev, u32 *iv, u32 *qv)
+static void rtw8822c_dac_iq_sort(struct rtw_dev *rtwdev, s32 *iv, s32 *qv)
 {
 	u32 i, j;
 
@@ -207,8 +212,9 @@ static void rtw8822c_dac_iq_sort(struct rtw_dev *rtwdev, u32 *iv, u32 *qv)
 	}
 }
 
-static void rtw8822c_dac_iq_offset(struct rtw_dev *rtwdev, u32 *vec, u32 *val)
+static void rtw8822c_dac_iq_offset(struct rtw_dev *rtwdev, s32 *vec_s32, u32 *val)
 {
+	u32 *vec = (u32 *)vec_s32;
 	u32 p, m, t, i;
 
 	m = 0;
@@ -271,8 +277,9 @@ static u32 rtw8822c_get_path_read_addr(u8 path)
 	return base_addr;
 }
 
-static bool rtw8822c_dac_iq_check(struct rtw_dev *rtwdev, u32 value)
+static bool rtw8822c_dac_iq_check(struct rtw_dev *rtwdev, s32 value_s32)
 {
+	u32 value = (u32)value_s32;
 	bool ret = true;
 
 	if ((value >= 0x200 && (0x400 - value) > 0x64) ||
@@ -284,7 +291,7 @@ static bool rtw8822c_dac_iq_check(struct rtw_dev *rtwdev, u32 value)
 	return ret;
 }
 
-static void rtw8822c_dac_cal_iq_sample(struct rtw_dev *rtwdev, u32 *iv, u32 *qv)
+static void rtw8822c_dac_cal_iq_sample(struct rtw_dev *rtwdev, s32 *iv, s32 *qv)
 {
 	u32 temp;
 	int i = 0, cnt = 0;
@@ -292,8 +299,8 @@ static void rtw8822c_dac_cal_iq_sample(struct rtw_dev *rtwdev, u32 *iv, u32 *qv)
 	while (i < DACK_SN_8822C && cnt < 10000) {
 		cnt++;
 		temp = rtw_read32_mask(rtwdev, 0x2dbc, 0x3fffff);
-		iv[i] = (temp & 0x3ff000) >> 12;
-		qv[i] = temp & 0x3ff;
+		iv[i] = (s32)((temp & 0x3ff000) >> 12);
+		qv[i] = (s32)(temp & 0x3ff);
 
 		if (rtw8822c_dac_iq_check(rtwdev, iv[i]) &&
 		    rtw8822c_dac_iq_check(rtwdev, qv[i]))
@@ -302,7 +309,7 @@ static void rtw8822c_dac_cal_iq_sample(struct rtw_dev *rtwdev, u32 *iv, u32 *qv)
 }
 
 static void rtw8822c_dac_cal_iq_search(struct rtw_dev *rtwdev,
-				       u32 *iv, u32 *qv,
+				       s32 *iv, s32 *qv,
 				       u32 *i_value, u32 *q_value)
 {
 	u32 i_max = 0, q_max = 0, i_min = 0, q_min = 0;
@@ -311,13 +318,13 @@ static void rtw8822c_dac_cal_iq_search(struct rtw_dev *rtwdev,
 	int i, cnt = 0;
 
 	do {
-		i_min = iv[0];
-		i_max = iv[0];
-		q_min = qv[0];
-		q_max = qv[0];
+		i_min = (u32)iv[0];
+		i_max = (u32)iv[0];
+		q_min = (u32)qv[0];
+		q_max = (u32)qv[0];
 		for (i = 0; i < DACK_SN_8822C; i++) {
-			rtw8822c_rf_minmax_cmp(rtwdev, iv[i], &i_min, &i_max);
-			rtw8822c_rf_minmax_cmp(rtwdev, qv[i], &q_min, &q_max);
+			rtw8822c_rf_minmax_cmp(rtwdev, iv[i], (s32 *)&i_min, (s32 *)&i_max);
+			rtw8822c_rf_minmax_cmp(rtwdev, qv[i], (s32 *)&q_min, (s32 *)&q_max);
 		}
 
 		if (i_max < 0x200 && i_min < 0x200)
@@ -345,11 +352,11 @@ static void rtw8822c_dac_cal_iq_search(struct rtw_dev *rtwdev,
 
 		if (i_delta > 5 || q_delta > 5) {
 			temp = rtw_read32_mask(rtwdev, 0x2dbc, 0x3fffff);
-			iv[0] = (temp & 0x3ff000) >> 12;
-			qv[0] = temp & 0x3ff;
+			iv[0] = (s32)((temp & 0x3ff000) >> 12);
+			qv[0] = (s32)(temp & 0x3ff);
 			temp = rtw_read32_mask(rtwdev, 0x2dbc, 0x3fffff);
-			iv[DACK_SN_8822C - 1] = (temp & 0x3ff000) >> 12;
-			qv[DACK_SN_8822C - 1] = temp & 0x3ff;
+			iv[DACK_SN_8822C - 1] = (s32)((temp & 0x3ff000) >> 12);
+			qv[DACK_SN_8822C - 1] = (s32)(temp & 0x3ff);
 		} else {
 			break;
 		}
@@ -362,7 +369,7 @@ static void rtw8822c_dac_cal_iq_search(struct rtw_dev *rtwdev,
 static void rtw8822c_dac_cal_rf_mode(struct rtw_dev *rtwdev,
 				     u32 *i_value, u32 *q_value)
 {
-	u32 iv[DACK_SN_8822C], qv[DACK_SN_8822C];
+	s32 iv[DACK_SN_8822C], qv[DACK_SN_8822C];
 	u32 rf_a, rf_b;
 
 	rf_a = rtw_read_rf(rtwdev, RF_PATH_A, 0x0, RFREG_MASK);
-- 
2.55.0