From patchwork Mon May 4 20:22:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 201129 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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 C98EBC47257 for ; Mon, 4 May 2020 20:24:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A469720707 for ; Mon, 4 May 2020 20:24:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="LLShVk4R" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728051AbgEDUYj (ORCPT ); Mon, 4 May 2020 16:24:39 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:10531 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726825AbgEDUYi (ORCPT ); Mon, 4 May 2020 16:24:38 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1588623878; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=f3fnVP2eTuTvZIhUofcog6FkJ9NCRpXs7tEgTvSb670=; b=LLShVk4R9CAxIxDIlBbjtrWgdPNp8EmksOxYl10VZ2OSbNl+h7VRsyUSXyYJMoAlP3BTNuxn Xa5Z4FyveAoiPoeR8Gm3oC5+YHp4uOlgzcWJmVGc1M6tff3GgHPjVlfAAzb4ejMd/VRdNHJt 8wHsw7RtgJxsjPtLgOBbkHSTVgA= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1YmJiNiIsICJkZXZpY2V0cmVlQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5eb07a04.7f97a59c5420-smtp-out-n03; Mon, 04 May 2020 20:24:36 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 1CB3BC58A2E; Mon, 4 May 2020 20:24:32 +0000 (UTC) Received: from blr-ubuntu-87.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sibis) by smtp.codeaurora.org (Postfix) with ESMTPSA id 8BAEEC44793; Mon, 4 May 2020 20:24:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 8BAEEC44793 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=none smtp.mailfrom=sibis@codeaurora.org From: Sibi Sankar To: viresh.kumar@linaro.org, sboyd@kernel.org, georgi.djakov@linaro.org, bjorn.andersson@linaro.org, saravanak@google.com, mka@chromium.org Cc: nm@ti.com, agross@kernel.org, david.brown@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, rjw@rjwysocki.net, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dianders@chromium.org, vincent.guittot@linaro.org, amit.kucheria@linaro.org, ulf.hansson@linaro.org, lukasz.luba@arm.com, sudeep.holla@arm.com, Sibi Sankar Subject: [PATCH v4 06/12] cpufreq: qcom: Update the bandwidth levels on frequency change Date: Tue, 5 May 2020 01:52:37 +0530 Message-Id: <20200504202243.5476-7-sibis@codeaurora.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200504202243.5476-1-sibis@codeaurora.org> References: <20200504202243.5476-1-sibis@codeaurora.org> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add support to parse optional OPP table attached to the cpu node when the OPP bandwidth values are populated. This allows for scaling of DDR/L3 bandwidth levels with frequency change. Signed-off-by: Sibi Sankar --- v4: * Split fast switch disable into another patch [Lukasz] drivers/cpufreq/qcom-cpufreq-hw.c | 85 ++++++++++++++++++++++++++++++- 1 file changed, 83 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index fc92a8842e252..4fb489b69bc61 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include #include @@ -31,6 +32,63 @@ static unsigned long cpu_hw_rate, xo_rate; static struct platform_device *global_pdev; +static int qcom_cpufreq_set_bw(struct cpufreq_policy *policy, + unsigned long freq_khz) +{ + unsigned long freq_hz = freq_khz * 1000; + struct dev_pm_opp *opp; + struct device *dev; + int ret; + + dev = get_cpu_device(policy->cpu); + if (!dev) + return -ENODEV; + + opp = dev_pm_opp_find_freq_exact(dev, freq_hz, true); + if (IS_ERR(opp)) + return PTR_ERR(opp); + + ret = dev_pm_opp_set_bw(dev, opp); + dev_pm_opp_put(opp); + return ret; +} + +static int qcom_cpufreq_update_opp(struct device *cpu_dev, + unsigned long freq_khz, + unsigned long volt) +{ + unsigned long freq_hz = freq_khz * 1000; + + if (dev_pm_opp_update_voltage(cpu_dev, freq_hz, volt)) + return dev_pm_opp_add(cpu_dev, freq_hz, volt); + + /* Enable the opp after voltage update*/ + return dev_pm_opp_enable(cpu_dev, freq_hz); +} + +/* Check for optional interconnect paths on CPU0 */ +static int qcom_cpufreq_verify_icc_paths(struct device *dev) +{ + struct device *cpu_dev; + struct icc_path *path; + int ret; + + cpu_dev = get_cpu_device(0); + if (!cpu_dev) + return -EPROBE_DEFER; + + path = of_icc_get(cpu_dev, NULL); + ret = PTR_ERR_OR_ZERO(path); + if (ret) { + if (ret != -EPROBE_DEFER) + dev_err(cpu_dev, "Failed to get paths ddr/l3 scaling off\n"); + return ret; + } + + icc_put(path); + return ret; +} + static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy, unsigned int index) { @@ -39,6 +97,8 @@ static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy, writel_relaxed(index, perf_state_reg); + qcom_cpufreq_set_bw(policy, freq); + arch_set_freq_scale(policy->related_cpus, freq, policy->cpuinfo.max_freq); return 0; @@ -88,12 +148,27 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, { u32 data, src, lval, i, core_count, prev_freq = 0, freq; u32 volt; + u64 rate; struct cpufreq_frequency_table *table; + struct device_node *opp_table_np, *np; + int ret; table = kcalloc(LUT_MAX_ENTRIES + 1, sizeof(*table), GFP_KERNEL); if (!table) return -ENOMEM; + ret = dev_pm_opp_of_add_table(cpu_dev); + if (!ret) { + /* Disable all opps and cross-validate against LUT */ + opp_table_np = dev_pm_opp_of_get_opp_desc_node(cpu_dev); + for_each_available_child_of_node(opp_table_np, np) { + ret = of_property_read_u64(np, "opp-hz", &rate); + if (!ret) + dev_pm_opp_disable(cpu_dev, rate); + } + of_node_put(opp_table_np); + } + for (i = 0; i < LUT_MAX_ENTRIES; i++) { data = readl_relaxed(base + REG_FREQ_LUT + i * LUT_ROW_SIZE); @@ -112,7 +187,7 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, if (freq != prev_freq && core_count != LUT_TURBO_IND) { table[i].frequency = freq; - dev_pm_opp_add(cpu_dev, freq * 1000, volt); + qcom_cpufreq_update_opp(cpu_dev, freq, volt); dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i, freq, core_count); } else if (core_count == LUT_TURBO_IND) { @@ -133,7 +208,8 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, if (prev->frequency == CPUFREQ_ENTRY_INVALID) { prev->frequency = prev_freq; prev->flags = CPUFREQ_BOOST_FREQ; - dev_pm_opp_add(cpu_dev, prev_freq * 1000, volt); + qcom_cpufreq_update_opp(cpu_dev, prev_freq, + volt); } break; @@ -254,6 +330,7 @@ static int qcom_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy) void __iomem *base = policy->driver_data - REG_PERF_STATE; dev_pm_opp_remove_all_dynamic(cpu_dev); + dev_pm_opp_of_cpumask_remove_table(policy->related_cpus); kfree(policy->freq_table); devm_iounmap(&global_pdev->dev, base); @@ -301,6 +378,10 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev) global_pdev = pdev; + ret = qcom_cpufreq_verify_icc_paths(&pdev->dev); + if (ret) + return ret; + ret = cpufreq_register_driver(&cpufreq_qcom_hw_driver); if (ret) dev_err(&pdev->dev, "CPUFreq HW driver failed to register\n");