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From:   Prashanth K <quic_prashk@quicinc.com>
To:     <stable@vger.kernel.org>, Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
        "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>
CC:     Mathias Nyman <mathias.nyman@intel.com>,
        Tejas Joglekar <joglekar@synopsys.com>,
        <linux-kernel@vger.kernel.org>, <linux-usbyy@vger.kernel.org>,
        Prashanth K <quic_prashk@quicinc.com>
Subject: [PATCH 2/2] dt-bindings: usb: snps,dwc3: Add 'xhci-sg-trb-cache-size-quirk'
Date:   Sat, 18 Nov 2023 11:24:55 +0530
Message-ID: <20231118055455.249088-3-quic_prashk@quicinc.com>
In-Reply-To: <20231118055455.249088-1-quic_prashk@quicinc.com>
References: <20231118055455.249088-1-quic_prashk@quicinc.com>
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Add a new 'xhci-sg-trb-cache-size-quirk' DT quirk to dwc3 core
for preventing xhci hang issue while using SG buffers.

Signed-off-by: Prashanth K <quic_prashk@quicinc.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 ee5af4b..768fdb5 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:
-- 
2.7.4