From patchwork Thu Mar 14 14:04:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 780689 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 71F666FE1E; Thu, 14 Mar 2024 14:04:53 +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=1710425096; cv=none; b=EynTQ8UAC4B+u3bCVnkbRG3+O3iIw2EW8dzVwSWWCGuGztGwkQXqlLEzoaOsNe4adYTnjOez92gKsP5YGXlCJyPM7VkaiRRSc6f8IVEJqXF/Z4M070RQuWe/zzfeRz3a/2ufFU8F/xb8Jr4LNyuzrJ+yOeBFFdv/lrXAzcjrA8A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710425096; c=relaxed/simple; bh=mzHk+OCGnE2cjK/GID6NafKHM6xvW+nmtg17CRUaB+w=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=B2k5BU0YNIGxbRVoAygt3HuKUn9Tu9rT0H2Wm8I+pbMTVv3nptJHnq60Cnp8J7p689evomKtAmD3tjtKwKAiLU/ekIDqSqvooRo8VGW/wakycjpattZNu6XTV/+rdjWKajBNda+DF/RFtNORekav26dNaufA54U0d0N71Y4awjw= 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 340A61063; Thu, 14 Mar 2024 07:05:29 -0700 (PDT) Received: from e129166.arm.com (unknown [10.57.13.158]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 4D8253F762; Thu, 14 Mar 2024 07:04:50 -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 4/4] soc: samsung: exynos-asv: Update Energy Model after adjusting voltage Date: Thu, 14 Mar 2024 14:04:21 +0000 Message-Id: <20240314140421.3563571-5-lukasz.luba@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240314140421.3563571-1-lukasz.luba@arm.com> References: <20240314140421.3563571-1-lukasz.luba@arm.com> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 When the voltage for OPPs is adjusted there is a need to also update Energy Model framework. The EM data contains power values which depend on voltage values. The EM structure is used for thermal (IPA governor) and in scheduler task placement (EAS) so it should reflect the real HW model as best as possible to operate properly. Based on data on Exynos5422 ASV tables the maximum power difference might be ~29%. An Odroid-XU4 (with a random sample SoC in this chip lottery) showed power difference for some OPPs ~20%. Therefore, it's worth to update the EM. Signed-off-by: Lukasz Luba --- drivers/soc/samsung/exynos-asv.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/soc/samsung/exynos-asv.c b/drivers/soc/samsung/exynos-asv.c index d60af8acc3916..bd6bb2cab2cd8 100644 --- a/drivers/soc/samsung/exynos-asv.c +++ b/drivers/soc/samsung/exynos-asv.c @@ -11,6 +11,7 @@ #include #include +#include #include #include #include @@ -97,9 +98,17 @@ static int exynos_asv_update_opps(struct exynos_asv *asv) last_opp_table = opp_table; ret = exynos_asv_update_cpu_opps(asv, cpu); - if (ret < 0) + if (!ret) { + /* + * When the voltage for OPPs successfully + * changed, update the EM power values to + * reflect the reality and not use stale data + */ + em_dev_update_chip_binning(cpu); + } else { dev_err(asv->dev, "Couldn't udate OPPs for cpu%d\n", cpuid); + } } dev_pm_opp_put_opp_table(opp_table);