mirror of
https://github.com/coolsnowwolf/lede.git
synced 2025-07-30 12:26:57 +08:00
d81c03f05e
These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
83 lines
3.0 KiB
Diff
83 lines
3.0 KiB
Diff
From 3eecda8f1b9f2cb03234208f06592bc88ededc37 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Mon, 7 Mar 2022 16:18:55 +0000
|
|
Subject: [PATCH] xhci: add quirk for host controllers that don't update
|
|
endpoint DCS
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Seen on a VLI VL805 PCIe to USB controller. For non-stream endpoints
|
|
at least, if the xHC halts on a particular TRB due to an error then
|
|
the DCS field in the Out Endpoint Context maintained by the hardware
|
|
is not updated with the current cycle state.
|
|
|
|
Using the quirk XHCI_EP_CTX_BROKEN_DCS and instead fetch the DCS bit
|
|
from the TRB that the xHC stopped on.
|
|
|
|
[ bjorn: rebased to v5.14-rc2 ]
|
|
|
|
Link: https://github.com/raspberrypi/linux/issues/3060
|
|
Cc: stable@vger.kernel.org
|
|
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
|
|
Signed-off-by: Bjørn Mork <bjorn@mork.no>
|
|
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
|
|
Link: https://lore.kernel.org/r/20211008092547.3996295-3-mathias.nyman@linux.intel.com
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/usb/host/xhci-pci.c | 1 +
|
|
drivers/usb/host/xhci-ring.c | 23 ++++++++++++++++++++++-
|
|
2 files changed, 23 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/usb/host/xhci-pci.c
|
|
+++ b/drivers/usb/host/xhci-pci.c
|
|
@@ -429,6 +429,7 @@ static void xhci_pci_quirks(struct devic
|
|
if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == PCI_DEVICE_ID_VIA_VL805) {
|
|
xhci->quirks |= XHCI_LPM_SUPPORT;
|
|
xhci->quirks |= XHCI_TRB_OVERFETCH;
|
|
+ xhci->quirks |= XHCI_EP_CTX_BROKEN_DCS;
|
|
}
|
|
|
|
if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
|
|
--- a/drivers/usb/host/xhci-ring.c
|
|
+++ b/drivers/usb/host/xhci-ring.c
|
|
@@ -638,8 +638,11 @@ static int xhci_move_dequeue_past_td(str
|
|
struct xhci_ring *ep_ring;
|
|
struct xhci_command *cmd;
|
|
struct xhci_segment *new_seg;
|
|
+ struct xhci_segment *halted_seg = NULL;
|
|
union xhci_trb *new_deq;
|
|
int new_cycle;
|
|
+ union xhci_trb *halted_trb;
|
|
+ int index = 0;
|
|
dma_addr_t addr;
|
|
u64 hw_dequeue;
|
|
bool cycle_found = false;
|
|
@@ -658,7 +661,25 @@ static int xhci_move_dequeue_past_td(str
|
|
hw_dequeue = xhci_get_hw_deq(xhci, dev, ep_index, stream_id);
|
|
new_seg = ep_ring->deq_seg;
|
|
new_deq = ep_ring->dequeue;
|
|
- new_cycle = hw_dequeue & 0x1;
|
|
+
|
|
+ /*
|
|
+ * Quirk: xHC write-back of the DCS field in the hardware dequeue
|
|
+ * pointer is wrong - use the cycle state of the TRB pointed to by
|
|
+ * the dequeue pointer.
|
|
+ */
|
|
+ if (xhci->quirks & XHCI_EP_CTX_BROKEN_DCS &&
|
|
+ !(ep->ep_state & EP_HAS_STREAMS))
|
|
+ halted_seg = trb_in_td(xhci, td, hw_dequeue & ~0xf, false);
|
|
+ if (halted_seg) {
|
|
+ index = ((dma_addr_t)(hw_dequeue & ~0xf) - halted_seg->dma) /
|
|
+ sizeof(*halted_trb);
|
|
+ halted_trb = &halted_seg->trbs[index];
|
|
+ new_cycle = halted_trb->generic.field[3] & 0x1;
|
|
+ xhci_dbg(xhci, "Endpoint DCS = %d TRB index = %d cycle = %d\n",
|
|
+ (u8)(hw_dequeue & 0x1), index, new_cycle);
|
|
+ } else {
|
|
+ new_cycle = hw_dequeue & 0x1;
|
|
+ }
|
|
|
|
/*
|
|
* We want to find the pointer, segment and cycle state of the new trb
|