diff mbox series

rtw88: reduce polling time of IQ calibration

Message ID 20201208013444.10881-1-pkshih@realtek.com (mailing list archive)
State Superseded
Delegated to: Kalle Valo
Headers show
Series rtw88: reduce polling time of IQ calibration | expand

Commit Message

Ping-Ke Shih Dec. 8, 2020, 1:34 a.m. UTC 
From: Chin-Yen Lee <timlee@realtek.com>

When 8822CE is associating with AP, driver will poll status bit of
IQ calibration to confirm the IQ calibration is done, and then move on
the association process. Current polling time for IQ calibration is 6
seconds.

But occasionally driver fails in polling the status bit because the status
bit is not set after IQ calibration is done. When it happends, association
process will be serieously delayed up to 6 seconds. To avoid it, we reduce
polling time to 300ms, in which the IQ calibration can be done.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
v2: move define to the beginning of file
---
 drivers/net/wireless/realtek/rtw88/rtw8822c.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

Comments

Ping-Ke Shih Dec. 8, 2020, 1:41 a.m. UTC | #1 
On Tue, 2020-12-08 at 09:34 +0800, Ping-Ke Shih wrote:
> From: Chin-Yen Lee <timlee@realtek.com>
> 
> When 8822CE is associating with AP, driver will poll status bit of
> IQ calibration to confirm the IQ calibration is done, and then move on
> the association process. Current polling time for IQ calibration is 6
> seconds.
> 
> But occasionally driver fails in polling the status bit because the status
> bit is not set after IQ calibration is done. When it happends, association
> process will be serieously delayed up to 6 seconds. To avoid it, we reduce
> polling time to 300ms, in which the IQ calibration can be done.
> 
> Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
> ---
> v2: move define to the beginning of file
> 

Sorry. I forget to change mail subject to "PATCH V2". 
Please ignore this one.

---
Ping-Ke
diff mbox series

Patch

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
index 7dd3ccb73793..dd560c28abb2 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
@@ -18,6 +18,8 @@ 
 #include "bf.h"
 #include "efuse.h"
 
+#define IQK_DONE_8822C 0xaa
+
 static void rtw8822c_config_trx_mode(struct rtw_dev *rtwdev, u8 tx_path,
 				     u8 rx_path, bool is_tx2_path);
 
@@ -2110,20 +2112,17 @@  static void rtw8822c_do_iqk(struct rtw_dev *rtwdev)
 {
 	struct rtw_iqk_para para = {0};
 	u8 iqk_chk;
-	int counter;
+	int ret;
 
 	para.clear = 1;
 	rtw_fw_do_iqk(rtwdev, &para);
 
-	for (counter = 0; counter < 300; counter++) {
-		iqk_chk = rtw_read8(rtwdev, REG_RPT_CIP);
-		if (iqk_chk == 0xaa)
-			break;
-		msleep(20);
-	}
-	rtw_write8(rtwdev, REG_IQKSTAT, 0x0);
+	ret = read_poll_timeout(rtw_read8, iqk_chk, iqk_chk == IQK_DONE_8822C,
+				20000, 300000, false, rtwdev, REG_RPT_CIP);
+	if (ret)
+		rtw_warn(rtwdev, "failed to poll iqk status bit\n");
 
-	rtw_dbg(rtwdev, RTW_DBG_RFK, "iqk counter=%d\n", counter);
+	rtw_write8(rtwdev, REG_IQKSTAT, 0x0);
 }
 
 /* for coex */