linux-kernel - [PATCH 1/3] dt-bindings: usb: mtk-xhci: add a new property for broken streams

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Date:   Wed, 16 Dec 2020 19:51:23 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mathias Nyman <mathias.nyman@...el.com>
CC:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Hsin-Yi Wang <hsinyi@...omium.org>,
        Ikjoon Jang <ikjn@...omium.org>
Subject: [PATCH 1/3] dt-bindings: usb: mtk-xhci: add a new property for broken streams

The 0.96 xHCI controller on some platforms does not support
bulk stream even HCCPARAMS says supporting, due to MaxPSASize
is set a non-zero default value by mistake, so add a new
property "mediatek,broken_streams_quirk" to fix it.

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
this patch depends on:
  https://patchwork.kernel.org/project/linux-mediatek/list/?series=402773
  [v4,09/11] dt-bindings: usb: convert mediatek, mtk-xhci.txt to YAML schema
---
 Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml
index e5e03f902802..330f7294bf34 100644
--- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml
@@ -120,6 +120,11 @@ properties:
     description: The mask to disable u3ports, bit0 for u3port0,
       bit1 for u3port1, ... etc
 
+  mediatek,broken_streams_quirk:
+    description: set if the controller doesn't support bulk stream but
+      HCCPARAMS says support.
+    type: boolean
+
   "#address-cells":
     const: 1
 
-- 
2.18.0