wifi: rtw89: pci: update LTR settings

Modify PCI LTR control flow and LTR idle latency to improve power save
efficiency.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220916033811.13862-4-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/pci.c

@@ -2513,15 +2513,15 @@ int rtw89_pci_ltr_set(struct rtw89_dev *rtwdev, bool en)
 	if (rtw89_pci_ltr_is_err_reg_val(val))
 		return -EINVAL;
 
-	rtw89_write32_clr(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_HW_EN);
-	rtw89_write32_set(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_EN);
+	rtw89_write32_set(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_HW_EN | B_AX_LTR_EN |
+						   B_AX_LTR_WD_NOEMP_CHK);
 	rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_SPACE_IDX_MASK,
 			   PCI_LTR_SPC_500US);
 	rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_IDLE_TIMER_IDX_MASK,
-			   PCI_LTR_IDLE_TIMER_800US);
+			   PCI_LTR_IDLE_TIMER_3_2MS);
 	rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_1, B_AX_LTR_RX0_TH_MASK, 0x28);
 	rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_1, B_AX_LTR_RX1_TH_MASK, 0x28);
-	rtw89_write32(rtwdev, R_AX_LTR_IDLE_LATENCY, 0x88e088e0);
+	rtw89_write32(rtwdev, R_AX_LTR_IDLE_LATENCY, 0x90039003);
 	rtw89_write32(rtwdev, R_AX_LTR_ACTIVE_LATENCY, 0x880b880b);
 
 	return 0;

drivers/net/wireless/realtek/rtw89/reg.h

@@ -479,6 +479,7 @@
 #define R_AX_LTR_CTRL_0 0x8410
 #define B_AX_LTR_SPACE_IDX_MASK GENMASK(13, 12)
 #define B_AX_LTR_IDLE_TIMER_IDX_MASK GENMASK(10, 8)
+#define B_AX_LTR_WD_NOEMP_CHK BIT(6)
 #define B_AX_APP_LTR_ACT BIT(5)
 #define B_AX_APP_LTR_IDLE BIT(4)
 #define B_AX_LTR_EN BIT(1)