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usb: phy: mxs: fix getting wrong state with mxs_phy_is_otg_host()

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The function mxs_phy_is_otg_host() will return true if OTG_ID_VALUE is
0 at USBPHY_CTRL register. However, OTG_ID_VALUE will not reflect the real
state if the ID pin is float, such as Host-only or Type-C cases. The value
of OTG_ID_VALUE is always 1 which means device mode.
This patch will fix the issue by judging the current mode based on
last_event. The controller will update last_event in time.

Fixes: 7b09e67639d6 ("usb: phy: mxs: refine mxs_phy_disconnect_line")
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20230627110353.1879477-2-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xu Yang 2023-06-27 19:03:52 +08:00 committed by Greg Kroah-Hartman
parent b7a62611fa
commit 5eda42aebb
1 changed files with 2 additions and 8 deletions
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10
drivers/usb/phy/phy-mxs-usb.c
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@ -388,14 +388,8 @@ static void __mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool disconnect)
static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy)
{
void __iomem *base = mxs_phy->phy.io_priv;
u32 phyctrl = readl(base + HW_USBPHY_CTRL);
if (IS_ENABLED(CONFIG_USB_OTG) &&
!(phyctrl & BM_USBPHY_CTRL_OTG_ID_VALUE))
return true;
return false;
return IS_ENABLED(CONFIG_USB_OTG) &&
mxs_phy->phy.last_event == USB_EVENT_ID;
}
static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on)