From patchwork Wed Apr 3 15:49:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 785693 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3286714D426; Wed, 3 Apr 2024 15:49:36 +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=1712159377; cv=none; b=F74yhoar9FdkTSCXwhM3CVoWy2EJz2rN3RlmISXJfASV1dcxy5DWKxDRIYZUlEoPt7Sq70RQCk3e0kVZ8S5umDWnId/fhiJHvgcRQi27Tvx91aVYACJDSUVonYKbDzLbigAurIXJXBWazkr+7kqyO80/J1cLtWMslLtQL/3N/qE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712159377; c=relaxed/simple; bh=tsqqYBX34+zq0nQoQwApKnQcjJcj3i0phv23JxR4wVA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=kaXO70fhTzjnGM0MX02xpkh2RRGYXtJXyJDWmvlzKiC/07SS4Bjepr6AQs1dH1qEyH3v3GIA9D2dyfa03VUrXczUuouNQW88hkeo629y/lgM7sCD5n7omMZ86MiOzJOsi4x/uG4y2okLQlhE93yGukUb1YgqcDIMLWF2/8dgaEU= 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 E158D1595; Wed, 3 Apr 2024 08:50:06 -0700 (PDT) Received: from e129166.arm.com (unknown [10.57.72.191]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 65B5D3F7B4; Wed, 3 Apr 2024 08:49:33 -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 v5 4/4] soc: samsung: exynos-asv: Update Energy Model after adjusting voltage Date: Wed, 3 Apr 2024 16:49:07 +0100 Message-Id: <20240403154907.1420245-5-lukasz.luba@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403154907.1420245-1-lukasz.luba@arm.com> References: <20240403154907.1420245-1-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. Reviewed-by: Krzysztof Kozlowski Reviewed-by: Dietmar Eggemann Signed-off-by: Lukasz Luba --- drivers/soc/samsung/exynos-asv.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/soc/samsung/exynos-asv.c b/drivers/soc/samsung/exynos-asv.c index d60af8acc3916..97006cc3b9461 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 +98,16 @@ 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) { + /* + * Update EM power values since OPP + * voltage values may have changed. + */ + 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);