NothingOSS/android_kernel_msm-6.1_nothing_sm7635
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

FROMGIT: usb: dwc3: host: Set XHCI_SG_TRB_CACHE_SIZE_QUIRK

Browse source 
Upstream commit bac1ec5514 ("usb: xhci: Set quirk for
XHCI_SG_TRB_CACHE_SIZE_QUIRK") introduced a new quirk in XHCI
which fixes XHC timeout, which was seen on synopsys XHCs while
using SG buffers. But the support for this quirk isn't present
in the DWC3 layer.

We will encounter this XHCI timeout/hung issue if we run iperf
loopback tests using RTL8156 ethernet adaptor on DWC3 targets
with scatter-gather enabled. This gets resolved after enabling
the XHCI_SG_TRB_CACHE_SIZE_QUIRK. This patch enables it using
the xhci device property since its needed for DWC3 controller.

In Synopsys DWC3 databook,
Table 9-3: xHCI Debug Capability Limitations
Chained TRBs greater than TRB cache size: The debug capability
driver must not create a multi-TRB TD that describes smaller
than a 1K packet that spreads across 8 or more TRBs on either
the IN TR or the OUT TR.

Cc: stable@vger.kernel.org #5.11
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20240116055816.1169821-2-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 322910830
(cherry picked from commit 817349b6d26aadd8b38283a05ce0bab106b4c765
https: //git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/ usb-linus)
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Change-Id: I9a5bf2c4d43551406d452927084576387656953d
This commit is contained in:
Prashanth K 2024-01-30 11:26:07 +05:30
parent 89e4f7a7a3
commit 6bce7cfc5e
1 changed files with 3 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
drivers/usb/dwc3/host.c
View file

@ -66,7 +66,7 @@ out:
int dwc3_host_init(struct dwc3 *dwc)
{
struct property_entry props[4];
struct property_entry props[5];
struct platform_device *xhci;
int ret, irq;
int prop_idx = 0;
@ -94,6 +94,8 @@ int dwc3_host_init(struct dwc3 *dwc)
memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-sg-trb-cache-size-quirk");
if (dwc->usb3_lpm_capable)
props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");