From: Tejas Joglekar <Tejas.Joglekar@synopsys.com>
To: Tejas Joglekar <Tejas.Joglekar@synopsys.com>,
linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: John Youn <John.Youn@synopsys.com>
Subject: [RFC PATCH 4/4] dt-bindings: usb: Add snps,consolidate-trbs & consolidate-trbs
Date: Fri, 20 Dec 2019 19:10:24 +0530 [thread overview]
Message-ID: <2450178afa4e09b315402c64224b44b542363fc7.1576848504.git.joglekar@synopsys.com> (raw)
In-Reply-To: <cover.1576848504.git.joglekar@synopsys.com>
This commit adds the documentation for consolidate-trbs, and
snps,consolidate-trbs property. These when set enables the quirk for
XHCI driver for consolidation of TRB's when small buffer sizes are
scattered over the TRB cache not making up to MPS or total transfer size
with Synopsys xHC.
Signed-off-by: Tejas Joglekar <joglekar@synopsys.com>
---
Documentation/devicetree/bindings/usb/dwc3.txt | 6 ++++++
Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 +
2 files changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index 66780a47ad85..9851da41a442 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -101,6 +101,12 @@ Optional properties:
this and tx-thr-num-pkt-prd to a valid, non-zero value
1-16 (DWC_usb31 programming guide section 1.2.3) to
enable periodic ESS TX threshold.
+ - snps,consolidate-trbs: enable TRBs consolidation - host mode only. Set this
+ to valid then for Synopsys xHC the TRBs would be
+ consolidated to at least MPS in order to prevent the
+ controller getting hang due to small buffer sizes which
+ does not make up to MPS size or total transfer size
+ across TRB cache.
- <DEPRECATED> tx-fifo-resize: determines if the FIFO *has* to be reallocated.
- snps,incr-burst-type-adjustment: Value for INCR burst type of GSBUSCFG0
diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt
index 3f378951d624..be8d5e6a6333 100644
--- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt
@@ -43,6 +43,7 @@ Optional properties:
- quirk-broken-port-ped: set if the controller has broken port disable mechanism
- imod-interval-ns: default interrupt moderation interval is 5000ns
- phys : see usb-hcd.yaml in the current directory
+ - consolidate-trbs: indicate if you need to consolidate trbs
additionally the properties from usb-hcd.yaml (in the current directory) are
supported.
--
2.11.0
next prev parent reply other threads:[~2019-12-20 13:40 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-20 13:38 [RFC PATCH 0/4] Add logic to consolidate TRBs for Synopsys xHC Tejas Joglekar
2019-12-20 13:39 ` [RFC PATCH 1/4] usb: xhci: Synopsys xHC consolidate TRBs Tejas Joglekar
2020-01-02 9:08 ` David Laight
2020-01-03 16:44 ` Mathias Nyman
2020-02-07 17:17 ` Tejas Joglekar
2020-02-12 15:04 ` Mathias Nyman
2020-02-14 8:36 ` Tejas Joglekar
2020-03-03 10:24 ` Tejas Joglekar
2020-03-03 14:47 ` Mathias Nyman
2020-03-16 17:09 ` Tejas Joglekar
2020-03-17 8:48 ` Mathias Nyman
2019-12-20 13:39 ` [RFC PATCH 2/4] usb: dwc3: Add device property consolidate-trbs Tejas Joglekar
2019-12-20 13:40 ` [RFC PATCH 3/4] usb: xhci: Set quirk for XHCI_CONSOLIDATE_TRBS Tejas Joglekar
2019-12-20 13:40 ` Tejas Joglekar [this message]
2020-01-08 15:19 ` [RFC PATCH 4/4] dt-bindings: usb: Add snps,consolidate-trbs & consolidate-trbs Rob Herring
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