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Subject[PATCH 17/32] phy: phy-mt65xx-usb3: increase LFPS filter threshold
Date
From: Chunfeng Yun <chunfeng.yun@mediatek.com>

Increase LFPS filter threshold to avoid some fake remote wakeup
signal which cause U3 link fail and link to U2 only at about
0.01% probability.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/phy/phy-mt65xx-usb3.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
index fe2392ac0eb4..4fd47d007c30 100644
--- a/drivers/phy/phy-mt65xx-usb3.c
+++ b/drivers/phy/phy-mt65xx-usb3.c
@@ -106,6 +106,10 @@
#define P3A_RG_XTAL_EXT_EN_U3 GENMASK(11, 10)
#define P3A_RG_XTAL_EXT_EN_U3_VAL(x) ((0x3 & (x)) << 10)

+#define U3P_U3_PHYD_LFPS1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x000c)
+#define P3D_RG_FWAKE_TH GENMASK(21, 16)
+#define P3D_RG_FWAKE_TH_VAL(x) ((0x3f & (x)) << 16)
+
#define U3P_PHYD_CDR1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x005c)
#define P3D_RG_CDR_BIR_LTD1 GENMASK(28, 24)
#define P3D_RG_CDR_BIR_LTD1_VAL(x) ((0x1f & (x)) << 24)
@@ -303,6 +307,11 @@ static void phy_instance_init(struct mt65xx_u3phy *u3phy,
tmp |= P3D_RG_CDR_BIR_LTD0_VAL(0xc) | P3D_RG_CDR_BIR_LTD1_VAL(0x3);
writel(tmp, port_base + U3P_PHYD_CDR1);

+ tmp = readl(port_base + U3P_U3_PHYD_LFPS1);
+ tmp &= ~P3D_RG_FWAKE_TH;
+ tmp |= P3D_RG_FWAKE_TH_VAL(0x34);
+ writel(tmp, port_base + U3P_U3_PHYD_LFPS1);
+
tmp = readl(port_base + U3P_U3_PHYD_RXDET1);
tmp &= ~P3D_RG_RXDET_STB2_SET;
tmp |= P3D_RG_RXDET_STB2_SET_VAL(0x10);
--
2.11.0
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