From: Rob Herring <robh@kernel.org>
To: Tejas Joglekar <Tejas.Joglekar@synopsys.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
John Youn <John.Youn@synopsys.com>
Subject: Re: [RFC PATCH v2 1/4] dt-bindings: usb: Add documentation for SG trb cache size quirk
Date: Wed, 6 May 2020 15:15:58 -0500 [thread overview]
Message-ID: <20200506201558.GA15090@bogus> (raw)
In-Reply-To: <5f5fdfbd323159133fced5b1340f5eb5fd11a17a.1587461220.git.joglekar@synopsys.com>
On Tue, Apr 21, 2020 at 03:18:09PM +0530, Tejas Joglekar wrote:
> This commit adds the documentation for sgl-trb-cache-size-quirk, and
> snps,sgl-trb-cache-size-quirk property. These when set enables the
> quirk for XHCI driver for consolidation of sg list into a temporary
> buffer when small buffer sizes are scattered over the sg list not
> making up to MPS or total transfer size within TRB cache size with
> Synopsys xHC.
>
> Signed-off-by: Tejas Joglekar <joglekar@synopsys.com>
> ---
> Changes in v2:
> - Renamed the property
>
> Documentation/devicetree/bindings/usb/dwc3.txt | 4 ++++
> Documentation/devicetree/bindings/usb/usb-xhci.txt | 3 +++
> 2 files changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
> index 9946ff9ba735..6d0418ee4dbd 100644
> --- a/Documentation/devicetree/bindings/usb/dwc3.txt
> +++ b/Documentation/devicetree/bindings/usb/dwc3.txt
> @@ -104,6 +104,10 @@ 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,sgl-trb-cache-size-quirk: enable sg list consolidation - host mode
> + only. Set to use SG buffers of at least MPS size
> + by consolidating smaller SG buffers list into a
> + single buffer.
>
> - <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..14d900474894 100644
> --- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
> +++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt
> @@ -43,6 +43,9 @@ 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
> + - sgl-trb-cache-size-quirk: set if you need to consolidate sg list into a
> + temporary buffer when small SG buffer sizes does not make upto MPS
> + size or total transfer size across the TRB cache size.
Why do we have 2 different names?
>
> additionally the properties from usb-hcd.yaml (in the current directory) are
> supported.
> --
> 2.11.0
>
next prev parent reply other threads:[~2020-05-06 20:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-21 9:47 [RFC PATCH v2 0/4] Add logic to consolidate TRBs for Synopsys xHC Tejas Joglekar
2020-04-21 9:48 ` [RFC PATCH v2 1/4] dt-bindings: usb: Add documentation for SG trb cache size quirk Tejas Joglekar
2020-05-06 20:15 ` Rob Herring [this message]
2020-05-07 16:03 ` Tejas Joglekar
2020-05-06 20:16 ` Rob Herring
2020-05-07 16:07 ` Tejas Joglekar
2020-04-21 9:48 ` [RFC PATCH v2 2/4] usb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK Tejas Joglekar
2020-04-21 9:48 ` [RFC PATCH v2 3/4] usb: dwc3: Add device property sgl-trb-cache-size-quirk Tejas Joglekar
2020-04-21 9:49 ` [RFC PATCH v2 4/4] usb: xhci: Use temporary buffer to consolidate SG Tejas Joglekar
2020-05-18 8:38 ` Tejas Joglekar
2020-05-18 16:21 ` Mathias Nyman
2020-05-20 6:41 ` Tejas Joglekar
2020-05-20 16:50 ` Alan Stern
2020-05-20 17:00 ` Tejas Joglekar
2020-05-20 17:44 ` Alan Stern
2020-05-22 1:58 ` Tejas Joglekar
2020-05-22 14:21 ` Alan Stern
2020-05-22 17:22 ` Tejas Joglekar
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