[PATCH rtw-next 04/16] wifi: rtw89: debug: disable inactive power save to reduce bus overhead

[Ping-Ke Shih <pkshih@realtek.com>]

From: Johnson Tsai <wenjie.tsai@realtek.com>

This helps avoid excessive bus traffic and I/O overhead on
slower HCIs (e.g., USB, SDIO) caused by frequent power state
transitions.

Add RTW89_DM_INACTIVE_PS to the disabled_dm bitmap via debugfs and
check it in the rtw89_enter_ips path. When set, the driver skips
entering inactive power save and returns immediately.

Signed-off-by: Johnson Tsai <wenjie.tsai@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/core.h  | 1 +
 drivers/net/wireless/realtek/rtw89/debug.c | 1 +
 drivers/net/wireless/realtek/rtw89/ps.c    | 6 ++++++
 3 files changed, 8 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 4a05a8dbb9ed..4e920472c8aa 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -5179,6 +5179,7 @@ enum rtw89_dm_type {
 	RTW89_DM_TAS,
 	RTW89_DM_MLO,
 	RTW89_DM_HW_SCAN,
+	RTW89_DM_INACTIVE_PS,
 };
 
 #define RTW89_THERMAL_PROT_LV_MAX 5
diff --git a/drivers/net/wireless/realtek/rtw89/debug.c b/drivers/net/wireless/realtek/rtw89/debug.c
index 02386d1d07c6..ebe3b1f9c39d 100644
--- a/drivers/net/wireless/realtek/rtw89/debug.c
+++ b/drivers/net/wireless/realtek/rtw89/debug.c
@@ -4348,6 +4348,7 @@ static const struct rtw89_disabled_dm_info {
 	DM_INFO(TAS),
 	DM_INFO(MLO),
 	DM_INFO(HW_SCAN),
+	DM_INFO(INACTIVE_PS),
 };
 
 static ssize_t
diff --git a/drivers/net/wireless/realtek/rtw89/ps.c b/drivers/net/wireless/realtek/rtw89/ps.c
index 125cf14fa581..31bb5dcd284a 100644
--- a/drivers/net/wireless/realtek/rtw89/ps.c
+++ b/drivers/net/wireless/realtek/rtw89/ps.c
@@ -234,8 +234,14 @@ void rtw89_enter_ips(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_vif_link *rtwvif_link;
 	struct rtw89_vif *rtwvif;
+	struct rtw89_hal *hal = &rtwdev->hal;
 	unsigned int link_id;
 
+	if (hal->disabled_dm_bitmap & BIT(RTW89_DM_INACTIVE_PS)) {
+		rtw89_debug(rtwdev, RTW89_DBG_PS, "skip enter IPS due to disabled_dm\n");
+		return;
+	}
+
 	set_bit(RTW89_FLAG_INACTIVE_PS, rtwdev->flags);
 
 	if (!test_bit(RTW89_FLAG_POWERON, rtwdev->flags))
-- 
2.25.1