From mboxrd@z Thu Jan 1 00:00:00 1970 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 E7BB1C54E71 for ; Fri, 22 Mar 2024 10:33:20 +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=VEwIGBddurSvDi 3UKsGC7nlRiW671OuQ7FZ0pRmQE2FvJ/JH4EG1Ln7uz84QKkfa60NuodWKj4RtEAD2+iz0b4cH/Il 6oJ3iFJsTaRtIrIZqVSwsgeeyQYCAqcYROGVd1MXFdlc5lGKoHzR/Ok7e0cD96MZz8mbpnGR34KpQ WBIPr9j9iWq9q0SFXLv9Soqp3yhtOHKHws8ovajNbiPpaYyDZfs43S9cptDT7iRHoEKWWp11cfv2j walhwSKw0A/YtI3qQqXVEv2Si8cfxUtFz3799nOXjP6O7OiRz/baNXfPazPpkQYppj8lKRFeGHKnY Em5Hp3uJvk1lc5KQfJYQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rncCs-00000006njL-2lms; Fri, 22 Mar 2024 10:33:03 +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 1rncCc-00000006nZl-2tfl for linux-arm-kernel@lists.infradead.org; Fri, 22 Mar 2024 10:32:48 +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 4D3411007; Fri, 22 Mar 2024 03:33:19 -0700 (PDT) Received: from e129166.arm.com (unknown [10.57.71.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C27C33F64C; Fri, 22 Mar 2024 03:32:42 -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 v2 4/4] soc: samsung: exynos-asv: Update Energy Model after adjusting voltage Date: Fri, 22 Mar 2024 10:32:21 +0000 Message-Id: <20240322103221.47594-5-lukasz.luba@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240322103221.47594-1-lukasz.luba@arm.com> References: <20240322103221.47594-1-lukasz.luba@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240322_033246_984248_8BA8E863 X-CRM114-Status: GOOD ( 12.91 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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); -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel