From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 94315C3A5A5 for ; Thu, 5 Sep 2019 09:28:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6588822CF5 for ; Thu, 5 Sep 2019 09:28:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="pfkV95Bv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731679AbfIEJ2V (ORCPT ); Thu, 5 Sep 2019 05:28:21 -0400 Received: from mail-wr1-f66.google.com ([209.85.221.66]:33844 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730485AbfIEJ2U (ORCPT ); Thu, 5 Sep 2019 05:28:20 -0400 Received: by mail-wr1-f66.google.com with SMTP id s18so1892121wrn.1 for ; Thu, 05 Sep 2019 02:28:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=ZSFUJO3Cl5xfTH0Oz2n3wB3n0rI8IaAXjOBMneGW988=; b=pfkV95Bv0UZfPijf04Lw+S5gWyPrZBf6nMW16xOvbNgBkOqbuTXKqhjFYAv9E+FprC 642QNfMlNoxFq2F0pUWRVLDLWtQL7aLFtrD6IJKWfeyGn3AkKPJwPOFVJ8qunlmtFhMp GKKYEIOvFTsJKHXCODaxCEyFcLgMBLlDjFYCqomKC9NKxAyn9Q72U1ovQrgfqEmTUG8o cYVriYNXSKLlGpnAn4pKQiheoN5zetXQ5lk4piehoTmcslfppIi5ZIQJdodEIIMRMZTE uvjWfyt0nD1xjB3h3EBMWIFAJvJyWlLFfsoGRS4tTUQzwhypCN4lrWEl8Ms7o4ipyBNB Yn4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=ZSFUJO3Cl5xfTH0Oz2n3wB3n0rI8IaAXjOBMneGW988=; b=I3TlYpea6rtjb+BuHREUz22ksxvUzVfN7WZrhpUzP+Kl1eYAsmoYSvIe6I/lA6EoNY +l99TyCt0p36U/G9qn4lrnb9NrW9r83r5zVKFXhHYES090yM7CkH6lymyzwfc93xcX6a fuz6Vy4Tvt70cAW24gNf+BCKrvdK1YDXYJsWxhZ2Tj7Zklk7zM1Y19y+7fum+Jory3Dz 9RoA63V5liHXCc1dJR4G1/A+xUy8Ci2Ke6z4Vknu7ElAHdjUWzOmjV7Au+cwU3pijvSb AY5DcD1ddEDo4F1ABjE2HX9O/b0zTQK4CJYDRQX27REjvpLonUm8ENyhdxZsJCzKrJYD s/QA== X-Gm-Message-State: APjAAAVoxd2RlwqMQ/+pwj5pFV2kBeE8i0ZatRBuoxiAoVqanefwzFDZ /ckyrXPqpDLgXZmVXQ54lbFaiA== X-Google-Smtp-Source: APXvYqzXqv86R+TXN5EBeFSzsw4TbvqcdMpFUJoJuOdwhoetcsejRn2RxvT5UuPS+bGgwEyO0gPGzw== X-Received: by 2002:adf:e7cc:: with SMTP id e12mr1706018wrn.299.1567675698218; Thu, 05 Sep 2019 02:28:18 -0700 (PDT) Received: from dell ([95.147.198.36]) by smtp.gmail.com with ESMTPSA id t7sm1796620wrr.37.2019.09.05.02.28.17 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 05 Sep 2019 02:28:17 -0700 (PDT) Date: Thu, 5 Sep 2019 10:28:16 +0100 From: Lee Jones To: Wolfram Sang Cc: alokc@codeaurora.org, agross@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, bjorn.andersson@linaro.org, linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, vkoul@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] i2c: qcom-geni: Provide an option to disable DMA processing Message-ID: <20190905092816.GD26880@dell> References: <20190905075213.13260-1-lee.jones@linaro.org> <20190905075213.13260-2-lee.jones@linaro.org> <20190905091800.GD1157@kunai> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20190905091800.GD1157@kunai> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Thu, 05 Sep 2019, Wolfram Sang wrote: > > > Fixes: 8bc529b25354 ("soc: qcom: geni: Add support for ACPI") > > Are you sure? From visual inspection, I don't see a correlation between > this commit and the fix here. This patch should have been part of the commit, or at the very least, part of the set, alluded to above. Unfortunately, I was carrying Bjorn's hack which simply returned early from geni_se_rx_dma_prep() with an error, so it masked the issue. > > Signed-off-by: Lee Jones > > Reviewed-by: Vinod Koul > > --- > > drivers/i2c/busses/i2c-qcom-geni.c | 14 ++++++++++---- > > 1 file changed, 10 insertions(+), 4 deletions(-) > > > > diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c > > index a89bfce5388e..8822dea82980 100644 > > --- a/drivers/i2c/busses/i2c-qcom-geni.c > > +++ b/drivers/i2c/busses/i2c-qcom-geni.c > > @@ -353,13 +353,16 @@ static void geni_i2c_tx_fsm_rst(struct geni_i2c_dev *gi2c) > > static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, > > u32 m_param) > > { > > + struct device_node *np = gi2c->se.dev->of_node; > > dma_addr_t rx_dma; > > unsigned long time_left; > > - void *dma_buf; > > + void *dma_buf = NULL; > > struct geni_se *se = &gi2c->se; > > size_t len = msg->len; > > > > - dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); > > + if (!of_property_read_bool(np, "qcom,geni-se-no-dma")) > > + dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); > > + > > if (dma_buf) > > geni_se_select_mode(se, GENI_SE_DMA); > > else > > @@ -392,13 +395,16 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, > > static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, > > u32 m_param) > > { > > + struct device_node *np = gi2c->se.dev->of_node; > > dma_addr_t tx_dma; > > unsigned long time_left; > > - void *dma_buf; > > + void *dma_buf = NULL; > > struct geni_se *se = &gi2c->se; > > size_t len = msg->len; > > > > - dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); > > + if (!of_property_read_bool(np, "qcom,geni-se-no-dma")) > > + dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); > > + > > if (dma_buf) > > geni_se_select_mode(se, GENI_SE_DMA); > > else -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog