rtw89: ps: fine tune polling interval while changing low power mode

By experiments, it spends ~45/1090~2480us to enter/leave low power mode,
so the old polling interval 1000us can waste time. Use smaller polling
interval depends on experimental results to reduce the time to transition
state.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220503120001.79272-5-pkshih@realtek.com

diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index 05b94842fe6621fdf8263b3cc5fedbf9d1e54f7d..07f6634d56a013dd8e008a1030f47ddf169c14c5 100644 (file)
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -1050,6 +1050,7 @@ static int rtw89_mac_check_cpwm_state(struct rtw89_dev *rtwdev,
 void rtw89_mac_power_mode_change(struct rtw89_dev *rtwdev, bool enter)
 {
        enum rtw89_rpwm_req_pwr_state state;
+       unsigned long delay = enter ? 10 : 150;
        int ret;
 
        if (enter)
@@ -1059,7 +1060,7 @@ void rtw89_mac_power_mode_change(struct rtw89_dev *rtwdev, bool enter)
 
        rtw89_mac_send_rpwm(rtwdev, state, false);
        ret = read_poll_timeout_atomic(rtw89_mac_check_cpwm_state, ret, !ret,
-                                      1000, 15000, false, rtwdev, state);
+                                      delay, 15000, false, rtwdev, state);
        if (ret)
                rtw89_err(rtwdev, "firmware failed to ack for %s ps mode\n",
                          enter ? "entering" : "leaving");