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: 13592457 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 21EA7C54E67 for ; Thu, 14 Mar 2024 14:05:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2xGhoIcmHUVgw8aGLPC/DJzI3Gsw2ueThMV64nRxoc0=; b=4B3Ls7dL7EnT2d NvzVcdoAAowQQi8H+aMV3bfBg9rBd868LXZbazSq4mL0oIRHdOW+94udtZB8CHdt5qv6Uqxd5sHUH zhS6BdrkdCZUtFc4GPl97WPxzoKwulMZoqgbbEtM7tqXBQ+3cs/h47J6svFIgw8uCV3ajVrNMQiiP 3Ng8s40r0CsGZ4h5kOtZHKBWNsNXo3HbS2zko/54nyHvJEKsp2XwP3lOgnfMZuafm9YTrPBp5YR0P Sdup3Im7K2ConlxkAsV4il1Yuw3nq9qV8+UnRH8dKXF33cYK3TXfreV7Uc4j/3W3dgOQCF3QWU7Ry OCYEbiM6Dcq+EQm6Ot7w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rklhk-0000000EXrU-2Uge; Thu, 14 Mar 2024 14:05:08 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rklhV-0000000EXjB-2lQw for linux-arm-kernel@lists.infradead.org; Thu, 14 Mar 2024 14:04:55 +0000 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> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240314_070453_904495_5F26DE5C X-CRM114-Status: GOOD ( 12.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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);