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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0422-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0422-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch55
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0422-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch b/target/linux/brcm2708/patches-4.19/950-0422-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch
new file mode 100644
index 0000000000..443b6408d4
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0422-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch
@@ -0,0 +1,55 @@
+From e30b8c6f64fe1cd5ea4e522186847be170efe88b Mon Sep 17 00:00:00 2001
+From: P33M <p33m@github.com>
+Date: Mon, 8 Apr 2019 12:45:23 +0100
+Subject: [PATCH 422/703] 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) {