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phy: rockchip: inno-usb2: Recovery iddig ctrl regs in resume

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During system suspend and resume, the iddig control
registers maybe changed unexpectedly because of some
reasons, such as grf lost power or modified in phy
tuning, it will cause otg host mode invalid after
system resume if the otg port was forced to host mode
by iddig registers before enter suspend.

This patch check the otg port mode and iddig status
in resume, if the otg port in force host mode and the
iddig status has changed during resume, it recovery
the iddig control regs for host mode.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Change-Id: I881736718db6ee5cf42c0cff58f3c2629cb29928
This commit is contained in:
William Wu
2024-08-21 15:12:43 +08:00
committed by Tao Huang
parent 2af76b3213
commit da6d7ef34d
1 changed files with 10 additions and 0 deletions
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10
drivers/phy/rockchip/phy-rockchip-inno-usb2.c
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@@ -3335,6 +3335,7 @@ static int rockchip_usb2phy_pm_resume(struct device *dev)
struct rockchip_usb2phy *rphy = dev_get_drvdata(dev);
const struct rockchip_usb2phy_cfg *phy_cfg = rphy->phy_cfg;
struct rockchip_usb2phy_port *rport;
struct regmap *base = get_reg_base(rphy);
unsigned int index;
bool iddig;
int ret = 0;
@@ -3378,6 +3379,15 @@ static int rockchip_usb2phy_pm_resume(struct device *dev)
mutex_lock(&rport->mutex);
iddig = property_enabled(rphy->grf,
&rport->port_cfg->utmi_iddig);
/* Recovery iddig control regs if otg force to host mode */
if (iddig != rport->prev_iddig && rport->prev_iddig == 0 &&
rport->port_id == USB2PHY_PORT_OTG &&
rport->mode == USB_DR_MODE_HOST) {
iddig = rport->prev_iddig;
property_enable(base, &rport->port_cfg->iddig_output, false);
property_enable(base, &rport->port_cfg->iddig_en, true);
}
ret = rockchip_usb2phy_enable_id_irq(rphy, rport,
true);
mutex_unlock(&rport->mutex);