From: Wesley Cheng <wcheng@codeaurora.org>
To: gregkh@linuxfoundation.org, robh+dt@kernel.org,
agross@kernel.org, bjorn.andersson@linaro.org, balbi@kernel.org
Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
jackp@codeaurora.org, fntoth@gmail.com,
Wesley Cheng <wcheng@codeaurora.org>
Subject: [PATCH v11 5/5] dt-bindings: usb: dwc3: Update dwc3 TX fifo properties
Date: Wed, 30 Jun 2021 02:00:42 -0700 [thread overview]
Message-ID: <1625043642-29822-6-git-send-email-wcheng@codeaurora.org> (raw)
In-Reply-To: <1625043642-29822-1-git-send-email-wcheng@codeaurora.org>
Update the tx-fifo-resize property with a better description, while
adding the tx-fifo-max-num, which is a new parameter allowing
adjustments for the maximum number of packets the txfifo resizing logic
can account for while resizing the endpoints.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
---
Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index 41416fb..078fb78 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -289,10 +289,21 @@ properties:
maximum: 16
tx-fifo-resize:
- description: Determines if the FIFO *has* to be reallocated
- deprecated: true
+ description: Determines if the TX fifos can be dynamically resized depending
+ on the number of IN endpoints used and if bursting is supported. This
+ may help improve bandwidth on platforms with higher system latencies, as
+ increased fifo space allows for the controller to prefetch data into its
+ internal memory.
type: boolean
+ tx-fifo-max-num:
+ description: Specifies the max number of packets the txfifo resizing logic
+ can account for when higher endpoint bursting is used. (bMaxBurst > 6) The
+ higher the number, the more fifo space the txfifo resizing logic will
+ allocate for that endpoint.
+ $ref: /schemas/types.yaml#/definitions/uint8
+ minimum: 3
+
snps,incr-burst-type-adjustment:
description:
Value for INCR burst type of GSBUSCFG0 register, undefined length INCR
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2021-06-30 9:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-30 9:00 [PATCH v11 0/5] Re-introduce TX FIFO resize for larger EP bursting Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 1/5] usb: gadget: udc: core: Introduce check_config to verify USB configuration Wesley Cheng
2021-07-02 5:00 ` Greg KH
2021-07-02 8:00 ` Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 2/5] usb: gadget: configfs: Check USB configuration before adding Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 3/5] usb: dwc3: Resize TX FIFOs to meet EP bursting requirements Wesley Cheng
2021-06-30 9:00 ` [PATCH v11 4/5] usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default Wesley Cheng
2021-07-01 1:09 ` kernel test robot
2021-07-02 5:06 ` Greg KH
2021-07-02 8:10 ` Wesley Cheng
2021-07-02 8:19 ` Greg KH
2021-06-30 9:00 ` Wesley Cheng [this message]
2021-07-02 5:04 ` [PATCH v11 0/5] Re-introduce TX FIFO resize for larger EP bursting Greg KH
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