From patchwork Tue Oct 29 22:00:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 1186373 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="Ol7lmEfc"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 472m085xVyz9sPL for ; Wed, 30 Oct 2019 09:07:04 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729142AbfJ2WHD (ORCPT ); Tue, 29 Oct 2019 18:07:03 -0400 Received: from mail-lf1-f67.google.com ([209.85.167.67]:44381 "EHLO mail-lf1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728319AbfJ2WGY (ORCPT ); Tue, 29 Oct 2019 18:06:24 -0400 Received: by mail-lf1-f67.google.com with SMTP id v4so8292003lfd.11; Tue, 29 Oct 2019 15:06:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5qAiDuX2tr8Je8Vo0BM4vOmpULUVfESd21buoKSOXDQ=; b=Ol7lmEfcLPW59ep9bb3Oq2znELvwbgViUyz/FAgHdp9AHFltLwSXrUN7XlWNuZcwkw sKnEJj2DhsYQJjMXNBIK0ZpwQLhB1n+/01XEW0uKAPN/1j6yMKntsnLMee9dQSppDER1 9wihrn8Fs6UQP3yEVKEoMGrbQgK1jgaA0Y2WOU686G0du63pD1JyfeRktIoKrF9ajnss iJcmlnl+Qiqc1gdoqziAp7CYkT4a3OaotNLaka/8HUG2KX03hudLDHFF08IEoHt7R26P +6smiW+Pm4ur3bPF+QtVgciwSYJsQDUQgPaneH+vWyxGcOeYpzs6xxpvRIelzYN+3shO g9jQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=5qAiDuX2tr8Je8Vo0BM4vOmpULUVfESd21buoKSOXDQ=; b=gKngIwM9Aa2VjtVxyiO3dPzMkcqoQ+f5023TGa4MhpVwvCAogh4VVYptzmztIOunJj UfseD0HI9QmE1bH+etoApcOX5OjRFGKGST+PLjVeA0YycTl3CIVC8gvbAj8m19wc+luK ULuR9NUwnlR0bbBmMIK9BjlEpyHRd5x4T4Hdjuml5QO5MlXI35wBrns7zmpf21eZarj7 hwwreiOtRFdfdkKjShlqwIVafBkFIFbYJGcv87IOKHNkZ3oO8px9luTvRpOwTjLq9CXL v58WHVH+WQtL0f75t3sp1fKr2I34F1fDk+H7AICq6czCmGP5Ed1HXIgTBt67AI9NYN0n xBqQ== X-Gm-Message-State: APjAAAVEJUdOmPTa8w4vzlIhiGNkomxeGboAj3dxggUH7N5CS+o/iv6+ X2zsEWuNjod8PvFRJLd/NUs= X-Google-Smtp-Source: APXvYqxkJCdL+P1WvBWJ5HU7cH4v8GOUnak3AKeag1L6SH34bgoN7jzTGQooONnXlvZMICPvFfBkzw== X-Received: by 2002:a19:651b:: with SMTP id z27mr3781047lfb.117.1572386782566; Tue, 29 Oct 2019 15:06:22 -0700 (PDT) Received: from localhost.localdomain (94-29-10-250.dynamic.spd-mgts.ru. [94.29.10.250]) by smtp.gmail.com with ESMTPSA id 12sm51536lje.92.2019.10.29.15.06.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2019 15:06:22 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Jonathan Hunter , Tomeu Vizoso , Peter Geis Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 13/19] PM / devfreq: tegra30: Increase sampling period to 16ms Date: Wed, 30 Oct 2019 01:00:13 +0300 Message-Id: <20191029220019.26773-14-digetx@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191029220019.26773-1-digetx@gmail.com> References: <20191029220019.26773-1-digetx@gmail.com> MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Increase sampling period by 4ms to get a nicer pow2 value, converting diving into shifts in the code. That's more preferable for Tegra30 that doesn't have hardware divider instructions because of older Cortex-A9 CPU. In a result boosting events are delayed by 4ms, which is not sensible in practice at all. Reviewed-by: Chanwoo Choi Tested-by: Peter Geis Signed-off-by: Dmitry Osipenko --- drivers/devfreq/tegra30-devfreq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c index 9da62f695859..9cbee82880ff 100644 --- a/drivers/devfreq/tegra30-devfreq.c +++ b/drivers/devfreq/tegra30-devfreq.c @@ -67,7 +67,7 @@ * translates to 2 ^ (K_VAL + 1). ex: 2 ^ (6 + 1) = 128 */ #define ACTMON_AVERAGE_WINDOW_LOG2 6 -#define ACTMON_SAMPLING_PERIOD 12 /* ms */ +#define ACTMON_SAMPLING_PERIOD 16 /* ms */ #define ACTMON_DEFAULT_AVG_BAND 6 /* 1/10 of % */ #define KHZ 1000