From patchwork Fri Jan 29 04:46:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 12055137 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4438C433E6 for ; Fri, 29 Jan 2021 04:49:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E24964E08 for ; Fri, 29 Jan 2021 04:49:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231907AbhA2Esy (ORCPT ); Thu, 28 Jan 2021 23:48:54 -0500 Received: from a1.mail.mailgun.net ([198.61.254.60]:44189 "EHLO a1.mail.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231878AbhA2EsR (ORCPT ); Thu, 28 Jan 2021 23:48:17 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1611895657; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=ZF8vF2fXsfi0RVA4nhuPT8u9xa7jaAoRy2vf7Vy4rT8=; b=YIrpPbs3EVG1YU+CjRAQknJ9MT75lbq20M+XvI4IpmpE6Zq30JDwFzPYRT1GoxQtsqiluANo GHacfmvWxAF7DDX1xR6DCy+YS+mxWbAvYZM6rcEfqDyDP99hDPEeCyj47qJFuck6E7S9xB0E ui1RlYhaZyGxEI2TJUAwwohJbIA= X-Mailgun-Sending-Ip: 198.61.254.60 X-Mailgun-Sid: WyIxZTE2YSIsICJsaW51eC11c2JAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n06.prod.us-west-2.postgun.com with SMTP id 6013934183b274b0af6520d8 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 29 Jan 2021 04:46:57 GMT Sender: wcheng=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id BA6ACC43461; Fri, 29 Jan 2021 04:46:55 +0000 (UTC) Received: from wcheng-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: wcheng) by smtp.codeaurora.org (Postfix) with ESMTPSA id 779F2C43462; Fri, 29 Jan 2021 04:46:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 779F2C43462 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=wcheng@codeaurora.org From: Wesley Cheng To: agross@kernel.org, bjorn.andersson@linaro.org, balbi@kernel.org, gregkh@linuxfoundation.org, robh+dt@kernel.org Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, Wesley Cheng Subject: [PATCH v7 5/5] dt-bindings: usb: dwc3: Update dwc3 TX fifo properties Date: Thu, 28 Jan 2021 20:46:44 -0800 Message-Id: <1611895604-4496-6-git-send-email-wcheng@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1611895604-4496-1-git-send-email-wcheng@codeaurora.org> References: <1611895604-4496-1-git-send-email-wcheng@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.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. Signed-off-by: Wesley Cheng Reviewed-by: Rob Herring --- 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 2247da7..652b246 100644 --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml @@ -283,10 +283,21 @@ 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