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authorChunfeng Yun <chunfeng.yun@mediatek.com>2021-03-08 03:52:06 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-03-10 09:37:17 +0100
commitf18b6edbce448e34eaf00767b19476cdb5030ec6 (patch)
treeb253be489e952517142e6b63885d12c48cd5c2f8 /drivers/usb/host/xhci-mtk-sch.c
parentusb: common: add function to get interval expressed in us unit (diff)
downloadlinux-f18b6edbce448e34eaf00767b19476cdb5030ec6.tar.xz
linux-f18b6edbce448e34eaf00767b19476cdb5030ec6.zip
usb: xhci-mtk: print debug info of endpoint interval
Print bInterval and convert it into the time expressed in us or ms unit, this is the key info when allocate bandwidth failed. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Link: https://lore.kernel.org/r/f7a9fa7a812296fcd6c603bfa9853076144018d6.1615170625.git.chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-mtk-sch.c')
-rw-r--r--drivers/usb/host/xhci-mtk-sch.c37
1 files changed, 29 insertions, 8 deletions
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
index 046b7f1ebf94..a59d1f6d4744 100644
--- a/drivers/usb/host/xhci-mtk-sch.c
+++ b/drivers/usb/host/xhci-mtk-sch.c
@@ -25,6 +25,8 @@
*/
#define TT_MICROFRAMES_MAX 9
+#define DBG_BUF_EN 64
+
/* schedule error type */
#define ESCH_SS_Y6 1001
#define ESCH_SS_OVERLAP 1002
@@ -62,6 +64,31 @@ static int is_fs_or_ls(enum usb_device_speed speed)
return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW;
}
+static const char *
+decode_ep(struct usb_host_endpoint *ep, enum usb_device_speed speed)
+{
+ static char buf[DBG_BUF_EN];
+ struct usb_endpoint_descriptor *epd = &ep->desc;
+ unsigned int interval;
+ const char *unit;
+
+ interval = usb_decode_interval(epd, speed);
+ if (interval % 1000) {
+ unit = "us";
+ } else {
+ unit = "ms";
+ interval /= 1000;
+ }
+
+ snprintf(buf, DBG_BUF_EN, "%s ep%d%s %s, mpkt:%d, interval:%d/%d%s\n",
+ usb_speed_string(speed), usb_endpoint_num(epd),
+ usb_endpoint_dir_in(epd) ? "in" : "out",
+ usb_ep_type_string(usb_endpoint_type(epd)),
+ usb_endpoint_maxp(epd), epd->bInterval, interval, unit);
+
+ return buf;
+}
+
static u32 get_bw_boundary(enum usb_device_speed speed)
{
u32 boundary;
@@ -711,10 +738,7 @@ static int add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
ep_index = xhci_get_endpoint_index(&ep->desc);
ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
- xhci_dbg(xhci, "%s() type:%d, speed:%d, mpkt:%d, dir:%d, ep:%p\n",
- __func__, usb_endpoint_type(&ep->desc), udev->speed,
- usb_endpoint_maxp(&ep->desc),
- usb_endpoint_dir_in(&ep->desc), ep);
+ xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
if (!need_bw_sch(ep, udev->speed, !!virt_dev->tt_info)) {
/*
@@ -750,10 +774,7 @@ static void drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
virt_dev = xhci->devs[udev->slot_id];
- xhci_dbg(xhci, "%s() type:%d, speed:%d, mpks:%d, dir:%d, ep:%p\n",
- __func__, usb_endpoint_type(&ep->desc), udev->speed,
- usb_endpoint_maxp(&ep->desc),
- usb_endpoint_dir_in(&ep->desc), ep);
+ xhci_dbg(xhci, "%s %s\n", __func__, decode_ep(ep, udev->speed));
if (!need_bw_sch(ep, udev->speed, !!virt_dev->tt_info))
return;