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[PATCH v15 8/9] usb: dwc3: qcom: Enable wakeup for applicable ports of multiport

Krishna Kurapati posted 9 patches 1 year, 12 months ago
There is a newer version of this series
[PATCH v15 8/9] usb: dwc3: qcom: Enable wakeup for applicable ports of multiport
Posted by Krishna Kurapati 1 year, 12 months ago 
DWC3 Qcom wrapper currently supports only wakeup configuration
for single port controllers. Read speed of each port connected
to the controller and enable wakeup for each of them accordingly.

Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
---
 drivers/usb/dwc3/dwc3-qcom.c | 72 ++++++++++++++++++------------------
 1 file changed, 37 insertions(+), 35 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index a20d63a791bd..572dc3fdae12 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -78,6 +78,7 @@ struct dwc3_qcom_port {
 	int			dp_hs_phy_irq;
 	int			dm_hs_phy_irq;
 	int			ss_phy_irq;
+	enum usb_device_speed	usb2_speed;
 };
 
 struct dwc3_qcom {
@@ -336,7 +337,8 @@ static bool dwc3_qcom_is_host(struct dwc3_qcom *qcom)
 	return dwc->xhci;
 }
 
-static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
+static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom,
+						       int port_index)
 {
 	struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
 	struct usb_device *udev;
@@ -347,14 +349,8 @@ static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
 	 */
 	hcd = platform_get_drvdata(dwc->xhci);
 
-	/*
-	 * It is possible to query the speed of all children of
-	 * USB2.0 root hub via usb_hub_for_each_child(). DWC3 code
-	 * currently supports only 1 port per controller. So
-	 * this is sufficient.
-	 */
 #ifdef CONFIG_USB
-	udev = usb_hub_find_child(hcd->self.root_hub, 1);
+	udev = usb_hub_find_child(hcd->self.root_hub, port_index + 1);
 #else
 	udev = NULL;
 #endif
@@ -387,23 +383,29 @@ static void dwc3_qcom_disable_wakeup_irq(int irq)
 
 static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
 {
+	int i;
+
 	dwc3_qcom_disable_wakeup_irq(qcom->qusb2_phy_irq);
 
-	if (qcom->usb2_speed == USB_SPEED_LOW) {
-		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dm_hs_phy_irq);
-	} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
-			(qcom->usb2_speed == USB_SPEED_FULL)) {
-		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dp_hs_phy_irq);
-	} else {
-		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dp_hs_phy_irq);
-		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dm_hs_phy_irq);
-	}
+	for (i = 0; i < qcom->num_ports; i++) {
+		if (qcom->port_info[i].usb2_speed == USB_SPEED_LOW) {
+			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dm_hs_phy_irq);
+		} else if ((qcom->port_info[i].usb2_speed == USB_SPEED_HIGH) ||
+				(qcom->port_info[i].usb2_speed == USB_SPEED_FULL)) {
+			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dp_hs_phy_irq);
+		} else {
+			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dp_hs_phy_irq);
+			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dm_hs_phy_irq);
+		}
 
-	dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].ss_phy_irq);
+		dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].ss_phy_irq);
+	}
 }
 
 static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
 {
+	int i;
+
 	dwc3_qcom_enable_wakeup_irq(qcom->qusb2_phy_irq, 0);
 
 	/*
@@ -414,22 +416,24 @@ static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
 	 * disconnect and remote wakeup. When no device is connected, configure both
 	 * DP and DM lines as rising edge to detect HS/HS/LS device connect scenario.
 	 */
+	for (i = 0; i < qcom->num_ports; i++) {
+		qcom->port_info[i].usb2_speed = dwc3_qcom_read_usb2_speed(qcom, i);
+		if (qcom->port_info[i].usb2_speed == USB_SPEED_LOW) {
+			dwc3_qcom_enable_wakeup_irq(qcom->port_info[i].dm_hs_phy_irq,
+						    IRQ_TYPE_EDGE_FALLING);
+		} else if ((qcom->port_info[i].usb2_speed == USB_SPEED_HIGH) ||
+				(qcom->port_info[i].usb2_speed == USB_SPEED_FULL)) {
+			dwc3_qcom_enable_wakeup_irq(qcom->port_info[i].dp_hs_phy_irq,
+						    IRQ_TYPE_EDGE_FALLING);
+		} else {
+			dwc3_qcom_enable_wakeup_irq(qcom->port_info[i].dp_hs_phy_irq,
+						    IRQ_TYPE_EDGE_RISING);
+			dwc3_qcom_enable_wakeup_irq(qcom->port_info[i].dm_hs_phy_irq,
+						    IRQ_TYPE_EDGE_RISING);
+		}
 
-	if (qcom->usb2_speed == USB_SPEED_LOW) {
-		dwc3_qcom_enable_wakeup_irq(qcom->port_info[0].dm_hs_phy_irq,
-					    IRQ_TYPE_EDGE_FALLING);
-	} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
-			(qcom->usb2_speed == USB_SPEED_FULL)) {
-		dwc3_qcom_enable_wakeup_irq(qcom->port_info[0].dp_hs_phy_irq,
-					    IRQ_TYPE_EDGE_FALLING);
-	} else {
-		dwc3_qcom_enable_wakeup_irq(qcom->port_info[0].dp_hs_phy_irq,
-					    IRQ_TYPE_EDGE_RISING);
-		dwc3_qcom_enable_wakeup_irq(qcom->port_info[0].dm_hs_phy_irq,
-					    IRQ_TYPE_EDGE_RISING);
+		dwc3_qcom_enable_wakeup_irq(qcom->port_info[i].ss_phy_irq, 0);
 	}
-
-	dwc3_qcom_enable_wakeup_irq(qcom->port_info[0].ss_phy_irq, 0);
 }
 
 static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
@@ -455,10 +459,8 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
 	 * The role is stable during suspend as role switching is done from a
 	 * freezable workqueue.
 	 */
-	if (dwc3_qcom_is_host(qcom) && wakeup) {
-		qcom->usb2_speed = dwc3_qcom_read_usb2_speed(qcom);
+	if (dwc3_qcom_is_host(qcom) && wakeup)
 		dwc3_qcom_enable_interrupts(qcom);
-	}
 
 	qcom->is_suspended = true;
 
-- 
2.34.1
Re: [PATCH v15 8/9] usb: dwc3: qcom: Enable wakeup for applicable ports of multiport
Posted by Johan Hovold 1 year, 11 months ago 
On Fri, Feb 16, 2024 at 06:27:55AM +0530, Krishna Kurapati wrote:
> DWC3 Qcom wrapper currently supports only wakeup configuration
> for single port controllers. Read speed of each port connected
> to the controller and enable wakeup for each of them accordingly.
> 
> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
> Reviewed-by: Bjorn Andersson <andersson@kernel.org>
> Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
> ---
>  drivers/usb/dwc3/dwc3-qcom.c | 72 ++++++++++++++++++------------------
>  1 file changed, 37 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index a20d63a791bd..572dc3fdae12 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -78,6 +78,7 @@ struct dwc3_qcom_port {
>  	int			dp_hs_phy_irq;
>  	int			dm_hs_phy_irq;
>  	int			ss_phy_irq;
> +	enum usb_device_speed	usb2_speed;

You need to remove the corresponding, and now unused, field from struct
dwc3_qcom as well.

>  };
>  
>  struct dwc3_qcom {
> @@ -336,7 +337,8 @@ static bool dwc3_qcom_is_host(struct dwc3_qcom *qcom)
>  	return dwc->xhci;
>  }
>  
> -static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
> +static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom,
> +						       int port_index)

As I mentioned, there's no need for a line break after the first
parameter as this is a function definition (e.g. Linus as expressed a
preference for this as it makes functions easier to grep for).

>  {
>  	struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
>  	struct usb_device *udev;
> @@ -347,14 +349,8 @@ static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
>  	 */
>  	hcd = platform_get_drvdata(dwc->xhci);
>  
> -	/*
> -	 * It is possible to query the speed of all children of
> -	 * USB2.0 root hub via usb_hub_for_each_child(). DWC3 code
> -	 * currently supports only 1 port per controller. So
> -	 * this is sufficient.
> -	 */
>  #ifdef CONFIG_USB
> -	udev = usb_hub_find_child(hcd->self.root_hub, 1);
> +	udev = usb_hub_find_child(hcd->self.root_hub, port_index + 1);
>  #else
>  	udev = NULL;
>  #endif
> @@ -387,23 +383,29 @@ static void dwc3_qcom_disable_wakeup_irq(int irq)
>  
>  static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
>  {
> +	int i;
> +
>  	dwc3_qcom_disable_wakeup_irq(qcom->qusb2_phy_irq);
>  
> -	if (qcom->usb2_speed == USB_SPEED_LOW) {
> -		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dm_hs_phy_irq);
> -	} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
> -			(qcom->usb2_speed == USB_SPEED_FULL)) {
> -		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dp_hs_phy_irq);
> -	} else {
> -		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dp_hs_phy_irq);
> -		dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].dm_hs_phy_irq);
> -	}
> +	for (i = 0; i < qcom->num_ports; i++) {
> +		if (qcom->port_info[i].usb2_speed == USB_SPEED_LOW) {
> +			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dm_hs_phy_irq);
> +		} else if ((qcom->port_info[i].usb2_speed == USB_SPEED_HIGH) ||
> +				(qcom->port_info[i].usb2_speed == USB_SPEED_FULL)) {
> +			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dp_hs_phy_irq);
> +		} else {
> +			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dp_hs_phy_irq);
> +			dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].dm_hs_phy_irq);
> +		}
>  
> -	dwc3_qcom_disable_wakeup_irq(qcom->port_info[0].ss_phy_irq);
> +		dwc3_qcom_disable_wakeup_irq(qcom->port_info[i].ss_phy_irq);
> +	}

As I already commented on v13, this should be a per-port helper rather
than special casing qusb2_phy_irq and a for loop for the other
interrupts:

	A lot of these functions should become port operation where you
	either pass in a port structure directly or possibly a port
	index as I've mentioned before.

>  }
 
>  static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
> @@ -455,10 +459,8 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
>  	 * The role is stable during suspend as role switching is done from a
>  	 * freezable workqueue.
>  	 */
> -	if (dwc3_qcom_is_host(qcom) && wakeup) {
> -		qcom->usb2_speed = dwc3_qcom_read_usb2_speed(qcom);

And again, as I said for v13:

	So just let this function update the usb2 speed for all ports
	unless there are reasons not to.

rather than hide it away in an odd for loop in
dwc3_qcom_enable_interrupts().

> +	if (dwc3_qcom_is_host(qcom) && wakeup)
>  		dwc3_qcom_enable_interrupts(qcom);
> -	}
>  
>  	qcom->is_suspended = true;

Johan

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