* [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed hub port reset
@ 2022-10-26 19:07 Frank Li
2022-10-27 5:51 ` Peter Chen
2022-10-27 7:06 ` Alexander Stein
0 siblings, 2 replies; 4+ messages in thread
From: Frank Li @ 2022-10-26 19:07 UTC (permalink / raw)
To: jun.li, frank.li
Cc: a-govindraju, gregkh, hzpeterchen, imx, linux-kernel, linux-usb,
pawell, peter.chen, rogerq, stable
From: Li Jun <jun.li@nxp.com>
When usb 3.0 hub connect with one USB 2.0 device and NO USB 3.0 device,
some usb hub reports endless port reset message.
[ 190.324169] usb 2-1: new SuperSpeed USB device number 88 using xhci-hcd
[ 190.352834] hub 2-1:1.0: USB hub found
[ 190.356995] hub 2-1:1.0: 4 ports detected
[ 190.700056] usb 2-1: USB disconnect, device number 88
[ 192.472139] usb 2-1: new SuperSpeed USB device number 89 using xhci-hcd
[ 192.500820] hub 2-1:1.0: USB hub found
[ 192.504977] hub 2-1:1.0: 4 ports detected
[ 192.852066] usb 2-1: USB disconnect, device number 89
The reason is the runtime pm state of USB2.0 port is active and
USB 3.0 port is suspend, so parent device is active state.
cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/usb2/power/runtime_status
suspended
cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/usb1/power/runtime_status
active
cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/power/runtime_status
active
cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/power/runtime_status
active
So xhci_cdns3_suspend_quirk() have not called. U3 configure is not applied.
move U3 configure into host start. Reinit again in resume function in case
controller power lost during suspend.
Cc: stable@vger.kernel.org 5.10
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
Change from V1 to V2.
- call xhci_cdns3_plat_start() in xhci_cdns3_resume_quirk
in case power lost during suspend
drivers/usb/cdns3/host.c | 56 ++++++++++++++++++++--------------------
1 file changed, 28 insertions(+), 28 deletions(-)
diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
index 9643b905e2d8..6164fc4c96a4 100644
--- a/drivers/usb/cdns3/host.c
+++ b/drivers/usb/cdns3/host.c
@@ -24,11 +24,37 @@
#define CFG_RXDET_P3_EN BIT(15)
#define LPM_2_STB_SWITCH_EN BIT(25)
-static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd);
+static void xhci_cdns3_plat_start(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ u32 value;
+
+ /* set usbcmd.EU3S */
+ value = readl(&xhci->op_regs->command);
+ value |= CMD_PM_INDEX;
+ writel(value, &xhci->op_regs->command);
+
+ if (hcd->regs) {
+ value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
+ value |= CFG_RXDET_P3_EN;
+ writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
+
+ value = readl(hcd->regs + XECP_PORT_CAP_REG);
+ value |= LPM_2_STB_SWITCH_EN;
+ writel(value, hcd->regs + XECP_PORT_CAP_REG);
+ }
+}
+
+static int xhci_cdns3_resume_quirk(struct usb_hcd *hcd)
+{
+ xhci_cdns3_plat_start(hcd);
+ return 0;
+}
static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
.quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI,
- .suspend_quirk = xhci_cdns3_suspend_quirk,
+ .plat_start = xhci_cdns3_plat_start,
+ .resume_quirk = xhci_cdns3_resume_quirk,
};
static int __cdns_host_init(struct cdns *cdns)
@@ -90,32 +116,6 @@ static int __cdns_host_init(struct cdns *cdns)
return ret;
}
-static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd)
-{
- struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- u32 value;
-
- if (pm_runtime_status_suspended(hcd->self.controller))
- return 0;
-
- /* set usbcmd.EU3S */
- value = readl(&xhci->op_regs->command);
- value |= CMD_PM_INDEX;
- writel(value, &xhci->op_regs->command);
-
- if (hcd->regs) {
- value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
- value |= CFG_RXDET_P3_EN;
- writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
-
- value = readl(hcd->regs + XECP_PORT_CAP_REG);
- value |= LPM_2_STB_SWITCH_EN;
- writel(value, hcd->regs + XECP_PORT_CAP_REG);
- }
-
- return 0;
-}
-
static void cdns_host_exit(struct cdns *cdns)
{
kfree(cdns->xhci_plat_data);
--
2.34.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed hub port reset
2022-10-26 19:07 [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed hub port reset Frank Li
@ 2022-10-27 5:51 ` Peter Chen
2022-10-27 7:06 ` Alexander Stein
1 sibling, 0 replies; 4+ messages in thread
From: Peter Chen @ 2022-10-27 5:51 UTC (permalink / raw)
To: Frank Li
Cc: jun.li, a-govindraju, gregkh, hzpeterchen, imx, linux-kernel,
linux-usb, pawell, rogerq, stable
On 22-10-26 15:07:49, Frank Li wrote:
> From: Li Jun <jun.li@nxp.com>
>
> When usb 3.0 hub connect with one USB 2.0 device and NO USB 3.0 device,
> some usb hub reports endless port reset message.
>
> [ 190.324169] usb 2-1: new SuperSpeed USB device number 88 using xhci-hcd
> [ 190.352834] hub 2-1:1.0: USB hub found
> [ 190.356995] hub 2-1:1.0: 4 ports detected
> [ 190.700056] usb 2-1: USB disconnect, device number 88
> [ 192.472139] usb 2-1: new SuperSpeed USB device number 89 using xhci-hcd
> [ 192.500820] hub 2-1:1.0: USB hub found
> [ 192.504977] hub 2-1:1.0: 4 ports detected
> [ 192.852066] usb 2-1: USB disconnect, device number 89
>
> The reason is the runtime pm state of USB2.0 port is active and
> USB 3.0 port is suspend, so parent device is active state.
>
> cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/usb2/power/runtime_status
>
> suspended
>
> cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/usb1/power/runtime_status
>
> active
>
> cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/power/runtime_status
>
> active
>
> cat /sys/bus/platform/devices/5b110000.usb/5b130000.usb/power/runtime_status
>
> active
>
> So xhci_cdns3_suspend_quirk() have not called. U3 configure is not applied.
>
> move U3 configure into host start. Reinit again in resume function in case
> controller power lost during suspend.
>
> Cc: stable@vger.kernel.org 5.10
> Signed-off-by: Li Jun <jun.li@nxp.com>
> Signed-off-by: Frank Li <Frank.Li@nxp.com>
> ---
>
> Change from V1 to V2.
> - call xhci_cdns3_plat_start() in xhci_cdns3_resume_quirk
> in case power lost during suspend
Reviewed-by: Peter Chen <peter.chen@kernel.org>
>
> drivers/usb/cdns3/host.c | 56 ++++++++++++++++++++--------------------
> 1 file changed, 28 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
> index 9643b905e2d8..6164fc4c96a4 100644
> --- a/drivers/usb/cdns3/host.c
> +++ b/drivers/usb/cdns3/host.c
> @@ -24,11 +24,37 @@
> #define CFG_RXDET_P3_EN BIT(15)
> #define LPM_2_STB_SWITCH_EN BIT(25)
>
> -static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd);
> +static void xhci_cdns3_plat_start(struct usb_hcd *hcd)
> +{
> + struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> + u32 value;
> +
> + /* set usbcmd.EU3S */
> + value = readl(&xhci->op_regs->command);
> + value |= CMD_PM_INDEX;
> + writel(value, &xhci->op_regs->command);
> +
> + if (hcd->regs) {
> + value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
> + value |= CFG_RXDET_P3_EN;
> + writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
> +
> + value = readl(hcd->regs + XECP_PORT_CAP_REG);
> + value |= LPM_2_STB_SWITCH_EN;
> + writel(value, hcd->regs + XECP_PORT_CAP_REG);
> + }
> +}
> +
> +static int xhci_cdns3_resume_quirk(struct usb_hcd *hcd)
> +{
> + xhci_cdns3_plat_start(hcd);
> + return 0;
> +}
>
> static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
> .quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI,
> - .suspend_quirk = xhci_cdns3_suspend_quirk,
> + .plat_start = xhci_cdns3_plat_start,
> + .resume_quirk = xhci_cdns3_resume_quirk,
> };
>
> static int __cdns_host_init(struct cdns *cdns)
> @@ -90,32 +116,6 @@ static int __cdns_host_init(struct cdns *cdns)
> return ret;
> }
>
> -static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd)
> -{
> - struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> - u32 value;
> -
> - if (pm_runtime_status_suspended(hcd->self.controller))
> - return 0;
> -
> - /* set usbcmd.EU3S */
> - value = readl(&xhci->op_regs->command);
> - value |= CMD_PM_INDEX;
> - writel(value, &xhci->op_regs->command);
> -
> - if (hcd->regs) {
> - value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
> - value |= CFG_RXDET_P3_EN;
> - writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
> -
> - value = readl(hcd->regs + XECP_PORT_CAP_REG);
> - value |= LPM_2_STB_SWITCH_EN;
> - writel(value, hcd->regs + XECP_PORT_CAP_REG);
> - }
> -
> - return 0;
> -}
> -
> static void cdns_host_exit(struct cdns *cdns)
> {
> kfree(cdns->xhci_plat_data);
> --
> 2.34.1
>
--
Thanks,
Peter Chen
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed hub port reset
2022-10-26 19:07 [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed hub port reset Frank Li
2022-10-27 5:51 ` Peter Chen
@ 2022-10-27 7:06 ` Alexander Stein
2022-11-03 15:29 ` [EXT] " Frank Li
1 sibling, 1 reply; 4+ messages in thread
From: Alexander Stein @ 2022-10-27 7:06 UTC (permalink / raw)
To: Frank Li
Cc: jun.li, frank.li, a-govindraju, gregkh, hzpeterchen, imx,
linux-kernel, linux-usb, pawell, peter.chen, rogerq, stable
Am Mittwoch, 26. Oktober 2022, 21:07:49 CEST schrieb Frank Li:
> From: Li Jun <jun.li@nxp.com>
>
> When usb 3.0 hub connect with one USB 2.0 device and NO USB 3.0 device,
> some usb hub reports endless port reset message.
>
> [ 190.324169] usb 2-1: new SuperSpeed USB device number 88 using xhci-hcd
> [ 190.352834] hub 2-1:1.0: USB hub found
> [ 190.356995] hub 2-1:1.0: 4 ports detected
> [ 190.700056] usb 2-1: USB disconnect, device number 88
> [ 192.472139] usb 2-1: new SuperSpeed USB device number 89 using xhci-hcd
> [ 192.500820] hub 2-1:1.0: USB hub found
> [ 192.504977] hub 2-1:1.0: 4 ports detected
> [ 192.852066] usb 2-1: USB disconnect, device number 89
>
> The reason is the runtime pm state of USB2.0 port is active and
> USB 3.0 port is suspend, so parent device is active state.
>
> cat
> /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/usb2/po
> wer/runtime_status
>
> suspended
>
> cat
> /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/usb1/po
> wer/runtime_status
>
> active
>
> cat
> /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-hcd.1.auto/power/r
> untime_status
>
> active
>
> cat
> /sys/bus/platform/devices/5b110000.usb/5b130000.usb/power/runtime_status
>
> active
>
> So xhci_cdns3_suspend_quirk() have not called. U3 configure is not applied.
>
> move U3 configure into host start. Reinit again in resume function in case
> controller power lost during suspend.
>
> Cc: stable@vger.kernel.org 5.10
> Signed-off-by: Li Jun <jun.li@nxp.com>
> Signed-off-by: Frank Li <Frank.Li@nxp.com>
> ---
>
> Change from V1 to V2.
> - call xhci_cdns3_plat_start() in xhci_cdns3_resume_quirk
> in case power lost during suspend
>
> drivers/usb/cdns3/host.c | 56 ++++++++++++++++++++--------------------
> 1 file changed, 28 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
> index 9643b905e2d8..6164fc4c96a4 100644
> --- a/drivers/usb/cdns3/host.c
> +++ b/drivers/usb/cdns3/host.c
> @@ -24,11 +24,37 @@
> #define CFG_RXDET_P3_EN BIT(15)
> #define LPM_2_STB_SWITCH_EN BIT(25)
>
> -static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd);
> +static void xhci_cdns3_plat_start(struct usb_hcd *hcd)
> +{
> + struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> + u32 value;
> +
> + /* set usbcmd.EU3S */
> + value = readl(&xhci->op_regs->command);
> + value |= CMD_PM_INDEX;
> + writel(value, &xhci->op_regs->command);
> +
> + if (hcd->regs) {
> + value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
> + value |= CFG_RXDET_P3_EN;
> + writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
> +
> + value = readl(hcd->regs + XECP_PORT_CAP_REG);
> + value |= LPM_2_STB_SWITCH_EN;
> + writel(value, hcd->regs + XECP_PORT_CAP_REG);
> + }
> +}
> +
> +static int xhci_cdns3_resume_quirk(struct usb_hcd *hcd)
> +{
> + xhci_cdns3_plat_start(hcd);
> + return 0;
> +}
>
> static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
> .quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI,
> - .suspend_quirk = xhci_cdns3_suspend_quirk,
> + .plat_start = xhci_cdns3_plat_start,
> + .resume_quirk = xhci_cdns3_resume_quirk,
> };
>
> static int __cdns_host_init(struct cdns *cdns)
> @@ -90,32 +116,6 @@ static int __cdns_host_init(struct cdns *cdns)
> return ret;
> }
>
> -static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd)
> -{
> - struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> - u32 value;
> -
> - if (pm_runtime_status_suspended(hcd->self.controller))
> - return 0;
> -
> - /* set usbcmd.EU3S */
> - value = readl(&xhci->op_regs->command);
> - value |= CMD_PM_INDEX;
> - writel(value, &xhci->op_regs->command);
> -
> - if (hcd->regs) {
> - value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
> - value |= CFG_RXDET_P3_EN;
> - writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
> -
> - value = readl(hcd->regs + XECP_PORT_CAP_REG);
> - value |= LPM_2_STB_SWITCH_EN;
> - writel(value, hcd->regs + XECP_PORT_CAP_REG);
> - }
> -
> - return 0;
> -}
> -
> static void cdns_host_exit(struct cdns *cdns)
> {
> kfree(cdns->xhci_plat_data);
Although I could only test it on v5.15 downstream kernel
Acked-by: Alexander Stein <alexander.stein@ew.tq-group.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [EXT] Re: [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed hub port reset
2022-10-27 7:06 ` Alexander Stein
@ 2022-11-03 15:29 ` Frank Li
0 siblings, 0 replies; 4+ messages in thread
From: Frank Li @ 2022-11-03 15:29 UTC (permalink / raw)
To: Alexander Stein, gregkh
Cc: Jun Li, a-govindraju, hzpeterchen, imx, linux-kernel, linux-usb,
pawell, peter.chen, rogerq, stable
> -----Original Message-----
> From: Alexander Stein <alexander.stein@ew.tq-group.com>
> Sent: Thursday, October 27, 2022 2:06 AM
> To: Frank Li <frank.li@nxp.com>
> Cc: Jun Li <jun.li@nxp.com>; Frank Li <frank.li@nxp.com>; a-
> govindraju@ti.com; gregkh@linuxfoundation.org; hzpeterchen@gmail.com;
> imx@lists.linux.dev; linux-kernel@vger.kernel.org; linux-
> usb@vger.kernel.org; pawell@cadence.com; peter.chen@kernel.org;
> rogerq@kernel.org; stable@kernel.org
> Subject: [EXT] Re: [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed
> hub port reset
>
> Caution: EXT Email
>
> Am Mittwoch, 26. Oktober 2022, 21:07:49 CEST schrieb Frank Li:
> > From: Li Jun <jun.li@nxp.com>
> >
> > When usb 3.0 hub connect with one USB 2.0 device and NO USB 3.0 device,
> > some usb hub reports endless port reset message.
> >
> > [ 190.324169] usb 2-1: new SuperSpeed USB device number 88 using xhci-
> hcd
> > [ 190.352834] hub 2-1:1.0: USB hub found
> > [ 190.356995] hub 2-1:1.0: 4 ports detected
> > [ 190.700056] usb 2-1: USB disconnect, device number 88
> > [ 192.472139] usb 2-1: new SuperSpeed USB device number 89 using xhci-
> hcd
> > [ 192.500820] hub 2-1:1.0: USB hub found
> > [ 192.504977] hub 2-1:1.0: 4 ports detected
> > [ 192.852066] usb 2-1: USB disconnect, device number 89
> >
> > The reason is the runtime pm state of USB2.0 port is active and
> > USB 3.0 port is suspend, so parent device is active state.
> >
> > cat
> > /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-
> hcd.1.auto/usb2/po
> > wer/runtime_status
> >
> > suspended
> >
> > cat
> > /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-
> hcd.1.auto/usb1/po
> > wer/runtime_status
> >
> > active
> >
> > cat
> > /sys/bus/platform/devices/5b110000.usb/5b130000.usb/xhci-
> hcd.1.auto/power/r
> > untime_status
> >
> > active
> >
> > cat
> >
> /sys/bus/platform/devices/5b110000.usb/5b130000.usb/power/runtime_sta
> tus
> >
> > active
> >
> > So xhci_cdns3_suspend_quirk() have not called. U3 configure is not applied.
> >
> > move U3 configure into host start. Reinit again in resume function in case
> > controller power lost during suspend.
> >
> > Cc: stable@vger.kernel.org 5.10
> > Signed-off-by: Li Jun <jun.li@nxp.com>
> > Signed-off-by: Frank Li <Frank.Li@nxp.com>
> > ---
[Frank Li] @greg, friendly ping.
> >
> > Change from V1 to V2.
> > - call xhci_cdns3_plat_start() in xhci_cdns3_resume_quirk
> > in case power lost during suspend
> >
> > drivers/usb/cdns3/host.c | 56 ++++++++++++++++++++--------------------
> > 1 file changed, 28 insertions(+), 28 deletions(-)
> >
> > diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c
> > index 9643b905e2d8..6164fc4c96a4 100644
> > --- a/drivers/usb/cdns3/host.c
> > +++ b/drivers/usb/cdns3/host.c
> > @@ -24,11 +24,37 @@
> > #define CFG_RXDET_P3_EN BIT(15)
> > #define LPM_2_STB_SWITCH_EN BIT(25)
> >
> > -static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd);
> > +static void xhci_cdns3_plat_start(struct usb_hcd *hcd)
> > +{
> > + struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> > + u32 value;
> > +
> > + /* set usbcmd.EU3S */
> > + value = readl(&xhci->op_regs->command);
> > + value |= CMD_PM_INDEX;
> > + writel(value, &xhci->op_regs->command);
> > +
> > + if (hcd->regs) {
> > + value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
> > + value |= CFG_RXDET_P3_EN;
> > + writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
> > +
> > + value = readl(hcd->regs + XECP_PORT_CAP_REG);
> > + value |= LPM_2_STB_SWITCH_EN;
> > + writel(value, hcd->regs + XECP_PORT_CAP_REG);
> > + }
> > +}
> > +
> > +static int xhci_cdns3_resume_quirk(struct usb_hcd *hcd)
> > +{
> > + xhci_cdns3_plat_start(hcd);
> > + return 0;
> > +}
> >
> > static const struct xhci_plat_priv xhci_plat_cdns3_xhci = {
> > .quirks = XHCI_SKIP_PHY_INIT | XHCI_AVOID_BEI,
> > - .suspend_quirk = xhci_cdns3_suspend_quirk,
> > + .plat_start = xhci_cdns3_plat_start,
> > + .resume_quirk = xhci_cdns3_resume_quirk,
> > };
> >
> > static int __cdns_host_init(struct cdns *cdns)
> > @@ -90,32 +116,6 @@ static int __cdns_host_init(struct cdns *cdns)
> > return ret;
> > }
> >
> > -static int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd)
> > -{
> > - struct xhci_hcd *xhci = hcd_to_xhci(hcd);
> > - u32 value;
> > -
> > - if (pm_runtime_status_suspended(hcd->self.controller))
> > - return 0;
> > -
> > - /* set usbcmd.EU3S */
> > - value = readl(&xhci->op_regs->command);
> > - value |= CMD_PM_INDEX;
> > - writel(value, &xhci->op_regs->command);
> > -
> > - if (hcd->regs) {
> > - value = readl(hcd->regs + XECP_AUX_CTRL_REG1);
> > - value |= CFG_RXDET_P3_EN;
> > - writel(value, hcd->regs + XECP_AUX_CTRL_REG1);
> > -
> > - value = readl(hcd->regs + XECP_PORT_CAP_REG);
> > - value |= LPM_2_STB_SWITCH_EN;
> > - writel(value, hcd->regs + XECP_PORT_CAP_REG);
> > - }
> > -
> > - return 0;
> > -}
> > -
> > static void cdns_host_exit(struct cdns *cdns)
> > {
> > kfree(cdns->xhci_plat_data);
>
> Although I could only test it on v5.15 downstream kernel
> Acked-by: Alexander Stein <alexander.stein@ew.tq-group.com>
>
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-11-03 15:29 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-10-26 19:07 [PATCH v2 1/1] usb: cdns3: host: fix endless superspeed hub port reset Frank Li
2022-10-27 5:51 ` Peter Chen
2022-10-27 7:06 ` Alexander Stein
2022-11-03 15:29 ` [EXT] " Frank Li
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