linux-kernel - [PATCH v2 2/2] dt-bindings: usb: snps,dwc3: Add 'xhci-sg-trb-cache-size-quirk'

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Date:   Mon, 20 Nov 2023 11:28:03 +0530
From:   Prashanth K <quic_prashk@...cinc.com>
To:     <stable@...r.kernel.org>, Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
CC:     Mathias Nyman <mathias.nyman@...el.com>,
        Tejas Joglekar <joglekar@...opsys.com>,
        <linux-kernel@...r.kernel.org>, <linux-usbyy@...r.kernel.org>,
        Prashanth K <quic_prashk@...cinc.com>
Subject: [PATCH v2 2/2] dt-bindings: usb: snps,dwc3: Add 'xhci-sg-trb-cache-size-quirk'

Add a new 'xhci-sg-trb-cache-size-quirk' DT quirk to dwc3 core
for preventing xhci hang issue while using SG buffers.

Cc: <stable@...r.kernel.org> # 5.11
Fixes: bac1ec551434 ("usb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK")
Signed-off-by: Prashanth K <quic_prashk@...cinc.com>
---
 Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index ee5af4b381b1..768fdb5b1f05 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -459,6 +459,13 @@ properties:
     description:
       Enable USB remote wakeup.
 
+  xhci-sg-trb-cache-size-quirk:
+    description:
+      When set, fixes the SNPS xHC hang issue when the data is scattered across
+      small buffers which does not make at least MPS size for given controller
+      TRB cache size.
+    type: boolean
+
 unevaluatedProperties: false
 
 required:
-- 
2.25.1