diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch b/target/linux/bcm27xx/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch new file mode 100644 index 0000000000..d2a9973fa8 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch @@ -0,0 +1,55 @@ +From 0c988aed71773be4481b886ccf03c40a52f57cdb Mon Sep 17 00:00:00 2001 +From: P33M <p33m@github.com> +Date: Mon, 8 Apr 2019 12:45:23 +0100 +Subject: [PATCH] dwc_otg: only do_split when we actually need to do a + split + +The previous test would fail if the root port was in fullspeed mode +and there was a hub between the FS device and the root port. While +the transfer worked, the schedule mangling performed for high-speed +split transfers would break leading to an 8ms polling interval. +--- + drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c | 9 ++++----- + 1 file changed, 4 insertions(+), 5 deletions(-) + +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c +@@ -167,8 +167,10 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot + char *speed, *type; + int dev_speed; + uint32_t hub_addr, hub_port; ++ hprt0_data_t hprt; + + dwc_memset(qh, 0, sizeof(dwc_otg_qh_t)); ++ hprt.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0); + + /* Initialize QH */ + qh->ep_type = dwc_otg_hcd_get_pipe_type(&urb->pipe_info); +@@ -191,9 +193,8 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot + + qh->nak_frame = 0xffff; + +- if (((dev_speed == USB_SPEED_LOW) || +- (dev_speed == USB_SPEED_FULL)) && +- (hub_addr != 0 && hub_addr != 1)) { ++ if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED && ++ dev_speed != USB_SPEED_HIGH) { + DWC_DEBUGPL(DBG_HCD, + "QH init: EP %d: TT found at hub addr %d, for port %d\n", + dwc_otg_hcd_get_ep_num(&urb->pipe_info), hub_addr, +@@ -204,7 +205,6 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot + + if (qh->ep_type == UE_INTERRUPT || qh->ep_type == UE_ISOCHRONOUS) { + /* Compute scheduling parameters once and save them. */ +- hprt0_data_t hprt; + + /** @todo Account for split transfers in the bus time. */ + int bytecount = +@@ -219,7 +219,6 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot + SCHEDULE_SLOP); + qh->interval = urb->interval; + +- hprt.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0); + if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED) { + if (dev_speed == USB_SPEED_LOW || + dev_speed == USB_SPEED_FULL) { |