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@xxxxxxxxxxx>
> Reviewed-by: Bjorn Andersson <andersson@xxxxxxxxxx>
> Acked-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
> ---
> 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
