From patchwork Thu Mar 14 14:04:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 13592458 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 651066EB74; Thu, 14 Mar 2024 14:04:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710425084; cv=none; b=T96qrrYPm2eD+UChNDnCJikMz+o4iSvcpaf2ALm74xksg8MOvE9ejGwG+ULjbrjwsjvIy415rLcgmfmb6+o0ebH5iOuMUdotDgvOXge15IQMEiMAMEUYHsLo90qoU6kfhqgeastdClohk95kFz+7yA9S+S6Nx1lJPPKCUvjiNoA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710425084; c=relaxed/simple; bh=f53euNbOld+RaF4OHr1drOxSEZS1nlFkdLHaIZnNffM=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=e9y6M7Nxfd612HW6Axl1ty9KoppF2JsmKL1k8j0XIiOZVAq09GTQ5esUF5onjXGNmIvZSfPbWQcNK3Fus5q06oR/GE+Y4vB7MvJNfpyMcH2qHuwbO1ZAuV8sWGtYOvZdWw0F9GbB92xxtcenzCr7veTfffM/MIf/+KwCvsJXg3Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B06E21007; Thu, 14 Mar 2024 07:05:16 -0700 (PDT) Received: from e129166.arm.com (unknown [10.57.13.158]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D51443F762; Thu, 14 Mar 2024 07:04:37 -0700 (PDT) From: Lukasz Luba To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: lukasz.luba@arm.com, dietmar.eggemann@arm.com, linux-arm-kernel@lists.infradead.org, sboyd@kernel.org, nm@ti.com, linux-samsung-soc@vger.kernel.org, daniel.lezcano@linaro.org, rafael@kernel.org, viresh.kumar@linaro.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, m.szyprowski@samsung.com, mhiramat@kernel.org Subject: [PATCH 0/4] Update Energy Model after chip binning adjusted voltages Date: Thu, 14 Mar 2024 14:04:17 +0000 Message-Id: <20240314140421.3563571-1-lukasz.luba@arm.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi all, This is a follow-up patch aiming to add EM modification due to chip binning. The first RFC and the discussion can be found here [1]. It uses Exynos chip driver code as a 1st user. The EM framework has been extended to handle this use case easily, when the voltage has been changed after setup. On my Odroid-xu4 in some OPPs I can observe ~20% power difference. According to that data in driver tables it could be up to ~29%. This chip binning is applicable to a lot of SoCs, so the EM framework should make it easy to update. It uses the existing OPP and DT information to re-calculate the new power values. Changes: v2: - exported the OPP calculation function from the OPP/OF so it can be used from EM fwk (Viresh) - refactored EM updating function to re-use common code - added new EM function which can be used by chip device drivers which modify the voltage in OPPs v1 is at [1] Regards, Lukasz Luba [1] https://lore.kernel.org/lkml/20231220110339.1065505-1-lukasz.luba@arm.com/ Lukasz Luba (4): OPP: OF: Export dev_opp_pm_calc_power() for usage from EM PM: EM: Change the em_adjust_new_capacity() to re-use code PM: EM: Add em_dev_update_chip_binning() soc: samsung: exynos-asv: Update Energy Model after adjusting voltage drivers/opp/of.c | 17 +++-- drivers/soc/samsung/exynos-asv.c | 11 +++- include/linux/energy_model.h | 5 ++ include/linux/pm_opp.h | 8 +++ kernel/power/energy_model.c | 109 +++++++++++++++++++++++++------ 5 files changed, 125 insertions(+), 25 deletions(-)