From patchwork Thu Mar 28 08:51:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 13608208 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B33C164CCC; Thu, 28 Mar 2024 08:51:20 +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=1711615882; cv=none; b=YQEJSyY594IobBRoUpMpOKsNv1NMkrwCR4/U6mZjIsPztR9adSazeHkjHKteJa6lBj6OwE/6QYy2cQW01z35CgscR/Di9gpuc1GcOVsp8C0oTSvw9csKrvY23bKalOp9RmgbrNxybpbI7N/DbRWe7XO9NhPfzejkSTXTBR4tpg8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711615882; c=relaxed/simple; bh=VjTZgK/Qn0DOsZybfTiGOpl86fNw/oP4YfAinPR5uJc=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=GvnzxZww5oYxMeio/ZTnL+65oOHsInk29an1zEUaRhNvaW2nyxWrzQ6UPL/hR8LcN3v+4j8gy2DT3SqIwXFepys82hOG9ATc0EmuGlCtIakQN4LVSSPeU8BlCx4n0CwldnT7X3H04CnfFcDVk5ZuxVAUZ/p8OHI6wUoPHu5D1PA= 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 F016D2F4; Thu, 28 Mar 2024 01:51:53 -0700 (PDT) Received: from e129166.arm.com (unknown [10.57.73.83]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 932A03F7BD; Thu, 28 Mar 2024 01:51:17 -0700 (PDT) From: Lukasz Luba To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, rafael@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, viresh.kumar@linaro.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, m.szyprowski@samsung.com, mhiramat@kernel.org Subject: [PATCH v3 0/4] Update Energy Model after chip binning adjusted voltages Date: Thu, 28 Mar 2024 08:51:08 +0000 Message-Id: <20240328085112.3873050-1-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. It has dependency on Exynos SoC driver. Changes: v3: - updated header description patch 2/4 (Dietmar) - removed 2 sentences from comment and adjusted in patch 3/4 (Dietmar) - patch 4/4 re-phrased code comment (Dietmar) - collected tags (Krzysztof, Viresh) v2: - removed 'ret' from error message which wasn't initialized (Christian) v1: - 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 RFC is at [1] Regards, Lukasz Luba 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 | 106 +++++++++++++++++++++++++------ 5 files changed, 122 insertions(+), 25 deletions(-)