From patchwork Thu Feb 2 22:00:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 649691 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80D0AC636D3 for ; Thu, 2 Feb 2023 22:01:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232474AbjBBWBT (ORCPT ); Thu, 2 Feb 2023 17:01:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232424AbjBBWBR (ORCPT ); Thu, 2 Feb 2023 17:01:17 -0500 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDFFE5CD36 for ; Thu, 2 Feb 2023 14:00:53 -0800 (PST) Received: by mail-pj1-x102c.google.com with SMTP id nm12-20020a17090b19cc00b0022c2155cc0bso3144538pjb.4 for ; Thu, 02 Feb 2023 14:00:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=+vrP6x4T9y3LBVQTyEpVLcHcjo3vK9avyGJed9Ro+PY=; b=fDff1QUaUePyrEO4K8PPJaKVKrS67CDWzshdJihkORr3Ui4KtY4IlqYfEDwINOUrgc jcUkc/WY/hV+22kjwpG7NbLjhRLmn6hhUunsDgDto4c42tr1dygTqmITCJav1rljlcNB +vzWl29h+6Euy34nzxUXIXoBhcDrFDyAD+Dd0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=+vrP6x4T9y3LBVQTyEpVLcHcjo3vK9avyGJed9Ro+PY=; b=f2Pj5vcX9kiO0cxPWalBzU1040mOEmpPnVKH5vwyJ7KulvkdnKqS/x6BogUnEYth7G Ht6jwDtp7lFG/LlfrvobYOlaZ5+4lTRTyMlSo02MfI71WfL8f7CM14Kg4h0qmeynVKB1 36G/QLhFEac00hD+hubSqQGKK2N619OeqWGg6XAvYD0s+EnDCSWfyBNeXTqv4vHZHSUE 1le07/5b5PTnTXj/Y0KKG/ksV0ZQuAkO0oiqJm7fEN6te0WV5/V+UF8yTLliT++2vki9 OS/N1BSAuCk9M3poneLkIlWbsox4rweiEquW0UI1sYAXGj9lie/BN3t0GuuNVnsU3p1q Mjyw== X-Gm-Message-State: AO0yUKV/DXkYiEiG8qjkPUUVn9b40pQa94H8Ba0dzeYKXLE2dNnhM4Kg 97lXYQflYTZIRDeQ02XpcfnqFQ== X-Google-Smtp-Source: AK7set+0gtbk39rHfzSVgEM302zYU0TbkQDgIf0uMcHrg3ewECuj1/fjtP9RbRAbvJ76kTaZkURYyA== X-Received: by 2002:a17:902:cf08:b0:194:a6e0:3ba with SMTP id i8-20020a170902cf0800b00194a6e003bamr8169139plg.54.1675375236301; Thu, 02 Feb 2023 14:00:36 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:9d:2:f71:fcf9:d3e0:e9c0]) by smtp.gmail.com with ESMTPSA id jb21-20020a170903259500b00192fc9e8552sm179629plb.0.2023.02.02.14.00.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Feb 2023 14:00:35 -0800 (PST) From: Douglas Anderson To: Viresh Kumar , Manivannan Sadhasivam Cc: swboyd@chromium.org, mka@chromium.org, Douglas Anderson , Andy Gross , Bjorn Andersson , Konrad Dybcio , "Rafael J. Wysocki" , Sasha Levin , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH] cpufreq: qcom-hw: Fix cpufreq_driver->get() for non-LMH systems Date: Thu, 2 Feb 2023 14:00:23 -0800 Message-Id: <20230202140005.1.I4b30aaa027c73372ec4068cc0f0dc665af8b938d@changeid> X-Mailer: git-send-email 2.39.1.519.gcb327c4b5f-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On a sc7180-based Chromebook, when I go to /sys/devices/system/cpu/cpu0/cpufreq I can see: cpuinfo_cur_freq:2995200 cpuinfo_max_freq:1804800 scaling_available_frequencies:300000 576000 ... 1708800 1804800 scaling_cur_freq:1804800 scaling_max_freq:1804800 As you can see the `cpuinfo_cur_freq` is bogus. It turns out that this bogus info started showing up as of commit 205f5e984d30 ("cpufreq: qcom-hw: Fix the frequency returned by cpufreq_driver->get()"). That commit seems to assume that everyone is on the LMH bandwagon, but sc7180 isn't. Let's go back to the old code in the case where LMH isn't used. Fixes: 205f5e984d30 ("cpufreq: qcom-hw: Fix the frequency returned by cpufreq_driver->get()") Signed-off-by: Douglas Anderson Reviewed-by: Manivannan Sadhasivam --- drivers/cpufreq/qcom-cpufreq-hw.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 9505a812d6a1..957cf6bb8c05 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -143,40 +143,42 @@ static unsigned long qcom_lmh_get_throttle_freq(struct qcom_cpufreq_data *data) return lval * xo_rate; } -/* Get the current frequency of the CPU (after throttling) */ -static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) +/* Get the frequency requested by the cpufreq core for the CPU */ +static unsigned int qcom_cpufreq_get_freq(unsigned int cpu) { struct qcom_cpufreq_data *data; + const struct qcom_cpufreq_soc_data *soc_data; struct cpufreq_policy *policy; + unsigned int index; policy = cpufreq_cpu_get_raw(cpu); if (!policy) return 0; data = policy->driver_data; + soc_data = qcom_cpufreq.soc_data; - return qcom_lmh_get_throttle_freq(data) / HZ_PER_KHZ; + index = readl_relaxed(data->base + soc_data->reg_perf_state); + index = min(index, LUT_MAX_ENTRIES - 1); + + return policy->freq_table[index].frequency; } -/* Get the frequency requested by the cpufreq core for the CPU */ -static unsigned int qcom_cpufreq_get_freq(unsigned int cpu) +static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) { struct qcom_cpufreq_data *data; - const struct qcom_cpufreq_soc_data *soc_data; struct cpufreq_policy *policy; - unsigned int index; policy = cpufreq_cpu_get_raw(cpu); if (!policy) return 0; data = policy->driver_data; - soc_data = qcom_cpufreq.soc_data; - index = readl_relaxed(data->base + soc_data->reg_perf_state); - index = min(index, LUT_MAX_ENTRIES - 1); + if (data->throttle_irq >= 0) + return qcom_lmh_get_throttle_freq(data) / HZ_PER_KHZ; - return policy->freq_table[index].frequency; + return qcom_cpufreq_get_freq(cpu); } static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,