From patchwork Fri Jan 24 14:14:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamil Konieczny X-Patchwork-Id: 11350341 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F2C1C109A for ; Fri, 24 Jan 2020 14:15:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D03DB2087E for ; Fri, 24 Jan 2020 14:15:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="ZO49T1yL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390216AbgAXOPI (ORCPT ); Fri, 24 Jan 2020 09:15:08 -0500 Received: from mailout2.w1.samsung.com ([210.118.77.12]:54071 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388688AbgAXOPH (ORCPT ); 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Fri, 24 Jan 2020 14:15:05 +0000 (GMT) From: Kamil Konieczny To: k.konieczny@samsung.com Cc: Bartlomiej Zolnierkiewicz , Chanwoo Choi , Krzysztof Kozlowski , Kukjin Kim , Kyungmin Park , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Marek Szyprowski , MyungJoo Ham Subject: [PATCH RESEND 1/3] PM / devfreq: exynos-nocp: fix debug print type Date: Fri, 24 Jan 2020 15:14:47 +0100 Message-Id: <20200124141449.19844-2-k.konieczny@samsung.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200124141449.19844-1-k.konieczny@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA01Sa0hTcRTvv3t373U4u87B/rgwXPhBIzXsw4W0EhIW9kEIhISsW15U2qbs Tpcm+cp3qWXpfOET1Fk+lprug+GaiU6dFZr20EDF8kU6C9LKdFfLb+ec3+scOAQiMvBdiWiV hlGraIUME6Bdr35aTyxueYX7Fo6KqXZdK596t7HAp6rXdXyqYHYJoazWNpwaSVvGKcPsBJ96 a6zAKNt9M6B01l4e9dT8Cac+pDZi5xzlBn0OJn9WnyzP79ADuc3gFoKGCfwjGEV0PKP2OXNN EFWd8hKPzcdvWYva0RSQg+UCBwKSp2BNzWs0FwgIEdkIYGfeOMY1GwBOz78AXGMDcCWvir8v WW+e4nFAA4BptgzwT2Kc/wZ2WRjpA/tGBtHdWkxKYU7tA7sCIQ0InFlatQMuZDDc7Bm1C1DS A45V1tq3EpL+MMtYvxd3FJanWuxzBzIA6of1OMdxhoOlc3YfZIeT3lmO7AZAUo9D83LmThqx 05yH7WlqzscFLg504Fx9BG73VPG4Wgvna/JxTnsXwM9ZaygHnIYfRzexXR+E9IStRh9uHAgH KiZRzt4JTq44cys4wYddJQg3FsLsTBHH9oALQ/f2kqQwd7tl7yo5fDLdjxUC97IDx5QdOKbs f241QPRAwsSxykiG9VMxWm+WVrJxqkjvGzFKA9j5JMufge/doPfXdRMgCSBzFOqmvcJFfDqe TVCaACQQmVgIQj3DRcIIOiGRUcdcVccpGNYEpAQqkwj9ar9eEZGRtIa5yTCxjHof5REOrikg dIScqRQ8Ygd1U4e7ZvuDve7oLpzNlkjMTotfimtaGtwrmsKOhdC/tRcbVeK6pLGJtIbZ0kN1 C/Vbl5Mx94DmYguCNagSm7ShZEHQ8/zVIKy/WxOJHB9aG3e7ZJkL/+Eb2Ja+9r5o+PbjSX0G bUIKpCUmUvxGwUvyqOxr1MhQNoo+6YWoWfovHS5wd0UDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAIsWRmVeSWpSXmKPExsVy+t/xu7qvfmvFGazdymSxccZ6VovrX56z Wiz4NIPVov/xa2aL8+c3sFucbXrDbrHp8TVWi8u75rBZfO49wmgx4/w+Jou1R+6yW9xuXMHm wOOxaVUnm8fmJfUefVtWMXp83iQXwBKlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hpoWdkYqlnaGwe a2VkqqRvZ5OSmpNZllqkb5egl7Gg4TB7QR97xfnJG1kaGDvZuhg5OSQETCQ+rb7J1MXIxSEk sJRRoql7PxNEQlqi8fRqKFtY4s+1LrAGIYFPjBJb7wWC2GwC+hIHz55kAbFFgOo7F00EG8Qs sItZYsW02cwgCWEBb4lfO88xgtgsAqoSF+YuAhvEK2Aj0b5rCSvEAnmJ2Y2nweKcArYSq86s YodYZiMxZesqRoh6QYmTM5+ALWMGqm/eOpt5AqPALCSpWUhSCxiZVjGKpJYW56bnFhvqFSfm Fpfmpesl5+duYgTGzrZjPzfvYLy0MfgQowAHoxIP74x7WnFCrIllxZW5hxglOJiVRHgZwzTj hHhTEiurUovy44tKc1KLDzGaAj0xkVlKNDkfGNd5JfGGpobmFpaG5sbmxmYWSuK8HQIHY4QE 0hNLUrNTUwtSi2D6mDg4pRoYZTJFuBVvr5A4rVkyz2vv8ul52ZMkVn7NY3ql1aOixL5kppbn vQqLV3VMzbsvW3TFBXLOtGRpdtaadaYn/ohTzGX+7any3MEc2t9lLYJ+PO9ibDSaKZolJX1N Qm5vueXKaR9+xvG0LDjY6v6fx3wV68m0oNPz9vHf5JpjYKBy6+z7KytLa7mVWIozEg21mIuK EwHshtpWswIAAA== X-CMS-MailID: 20200124141506eucas1p2da00cf4424a6b5e5e6d3e245eda586a5 X-Msg-Generator: CA X-RootMTR: 20200124141506eucas1p2da00cf4424a6b5e5e6d3e245eda586a5 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200124141506eucas1p2da00cf4424a6b5e5e6d3e245eda586a5 References: <20200124141449.19844-1-k.konieczny@samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Values printed in dev_dbg are both unsigned long, but were printed as signed decimals. Change this to unsigned long. Signed-off-by: Kamil Konieczny --- drivers/devfreq/event/exynos-nocp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/devfreq/event/exynos-nocp.c b/drivers/devfreq/event/exynos-nocp.c index ccc531ee6938..ebe9cdf94f54 100644 --- a/drivers/devfreq/event/exynos-nocp.c +++ b/drivers/devfreq/event/exynos-nocp.c @@ -167,7 +167,7 @@ static int exynos_nocp_get_event(struct devfreq_event_dev *edev, edata->load_count = ((counter[1] << 16) | counter[0]); edata->total_count = ((counter[3] << 16) | counter[2]); - dev_dbg(&edev->dev, "%s (event: %ld/%ld)\n", edev->desc->name, + dev_dbg(&edev->dev, "%s (event: %lu/%lu)\n", edev->desc->name, edata->load_count, edata->total_count); return 0; From patchwork Fri Jan 24 14:14:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamil Konieczny X-Patchwork-Id: 11350353 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3C3FC6C1 for ; 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Fri, 24 Jan 2020 14:15:06 +0000 (GMT) X-AuditID: cbfec7f2-f0bff7000001ef66-4c-5e2afbeb61a9 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id A6.C2.07950.AEBFA2E5; Fri, 24 Jan 2020 14:15:06 +0000 (GMT) Received: from AMDC3218.digital.local (unknown [106.120.51.18]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200124141506eusmtip1eea5f29f451889f60fd8d12840c623cc~s2DhoZx_00071400714eusmtip1C; Fri, 24 Jan 2020 14:15:06 +0000 (GMT) From: Kamil Konieczny To: k.konieczny@samsung.com Cc: Bartlomiej Zolnierkiewicz , Chanwoo Choi , Krzysztof Kozlowski , Kukjin Kim , Kyungmin Park , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Marek Szyprowski , MyungJoo Ham Subject: [PATCH RESEND 2/3] PM / devfreq: exynos-bus: prepare for change in load calc in exynos-nocp Date: Fri, 24 Jan 2020 15:14:48 +0100 Message-Id: <20200124141449.19844-3-k.konieczny@samsung.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200124141449.19844-1-k.konieczny@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrAKsWRmVeSWpSXmKPExsWy7djPc7qvf2vFGbx9zWaxccZ6VovrX56z Wiz4NIPVov/xa2aL8+c3sFucbXrDbrHp8TVWi8u75rBZfO49wmgx4/w+Jou1R+6yW9xuXMHm wOOxaVUnm8fmJfUefVtWMXp83iQXwBLFZZOSmpNZllqkb5fAlXGxYzZzwT+Rij0rVjA2ME4T 7GLk5JAQMJE4duIeM4gtJLCCUaJ7p3cXIxeQ/YVR4tmDVlYI5zOjxL65PYwwHSsmrWeGSCxn lJi8egYjXMua9r3sIFVsAvoSB8+eZAGxRQSkJToXTWQCKWIW2MQsceDpFCaQhLBAmsTk2UfA bBYBVYltZ5rBDuEVsJHY1XKOGWKdvMTsxtNsIDangK3EqjOr2CFqBCVOznwCtoAZqKZ562yo +nXsEn92+EDYLhIfHjxgh7CFJV4d3wJly0icntzDAmGXSzxd2McOcpyEQAujxIP2j1AJa4k7 534BLeYAWqApsX6XPkTYUWLOjf1gYQkBPokbbwUhTuCTmLRtOjNEmFeio00IolpV4vmpHiYI W1qi6/86VogSD4ktOysmMCrOQvLLLCS/zEJYu4CReRWjeGppcW56arFhXmq5XnFibnFpXrpe cn7uJkZgOjr97/inHYxfLyUdYhTgYFTi4Z1xTytOiDWxrLgy9xCjBAezkggvY5hmnBBvSmJl VWpRfnxRaU5q8SFGaQ4WJXFe40UvY4UE0hNLUrNTUwtSi2CyTBycUg2M1jHa51NqTn5Kndgr K7sowoKJb0bi3mdN9jY2GmIWwlO4+Mzfq+xJ2N68ru+e1d93xh+3z/HcNts0RWbZ6yN5hzLZ lp5oTV6XLejgtCAx//aDdvWZ75WXOd3nUq5YOfHB7zeBqVULJwrIe1gdWiV9J5/dJWlxaLl+ u17GWYNETj3ZzzUcn64osRRnJBpqMRcVJwIA8caDNUMDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrIIsWRmVeSWpSXmKPExsVy+t/xu7qvfmvFGTx6q2+xccZ6VovrX56z Wiz4NIPVov/xa2aL8+c3sFucbXrDbrHp8TVWi8u75rBZfO49wmgx4/w+Jou1R+6yW9xuXMHm wOOxaVUnm8fmJfUefVtWMXp83iQXwBKlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hpoWdkYqlnaGwe a2VkqqRvZ5OSmpNZllqkb5egl3GxYzZzwT+Rij0rVjA2ME4T7GLk5JAQMJFYMWk9cxcjF4eQ wFJGie55S9ghEtISjadXM0HYwhJ/rnWxQRR9YpTYO30DI0iCTUBf4uDZkywgtghQQ+eiiUwg RcwCu5gltly+yAqSEBZIkXjzdypYA4uAqsS2M83MIDavgI3ErpZzzBAb5CVmN55mA7E5BWwl Vp1ZBXaFEFDNlK2rGCHqBSVOznwCtowZqL5562zmCYwCs5CkZiFJLWBkWsUoklpanJueW2yk V5yYW1yal66XnJ+7iREYPduO/dyyg7HrXfAhRgEORiUeXoc7WnFCrIllxZW5hxglOJiVRHgZ wzTjhHhTEiurUovy44tKc1KLDzGaAj0xkVlKNDkfGNl5JfGGpobmFpaG5sbmxmYWSuK8HQIH Y4QE0hNLUrNTUwtSi2D6mDg4pRoYG8Kn690oDXPpdLE3amA8Ea/Uf8lGNcevhZvBc8HDpgPz eBdvFRH9onn29Kfncqaiy/5KT3G5cTK5R7ddicF86W1BtXQ7Zd2szMW/jtb9rmY//+/8t8OL 1XZEKuqn3rwsYvFnz6nURw+Vpsf4aR+c41cUJNw//+mOJqlm9d2L5ISybtx6en+CEktxRqKh FnNRcSIAEuiY97QCAAA= X-CMS-MailID: 20200124141506eucas1p1d2fdb3b5d26d123272cafeddecd5708a X-Msg-Generator: CA X-RootMTR: 20200124141506eucas1p1d2fdb3b5d26d123272cafeddecd5708a X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200124141506eucas1p1d2fdb3b5d26d123272cafeddecd5708a References: <20200124141449.19844-1-k.konieczny@samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add time to struct exynos_bus and time and current frequency to struct devfreq_event_data. This will allow to calculate load and max bandwidth in exynos-nocp driver. Signed-off-by: Kamil Konieczny --- drivers/devfreq/exynos-bus.c | 21 ++++++++++++++++++++- include/linux/devfreq-event.h | 4 ++++ 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index 8fa8eb541373..f04ce5b84e75 100644 --- a/drivers/devfreq/exynos-bus.c +++ b/drivers/devfreq/exynos-bus.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -31,6 +32,7 @@ struct exynos_bus { struct mutex lock; unsigned long curr_freq; + unsigned long prev_time; struct opp_table *opp_table; struct clk *clk; @@ -57,7 +59,22 @@ static int exynos_bus_##ops(struct exynos_bus *bus) \ } exynos_bus_ops_edev(enable_edev); exynos_bus_ops_edev(disable_edev); -exynos_bus_ops_edev(set_event); + +static int exynos_bus_set_event(struct exynos_bus *bus) +{ + int i, ret; + + bus->prev_time = jiffies; + for (i = 0; i < bus->edev_count; i++) { + if (!bus->edev[i]) + continue; + ret = devfreq_event_set_event(bus->edev[i]); + if (ret < 0) + return ret; + } + + return 0; +} static int exynos_bus_get_event(struct exynos_bus *bus, struct devfreq_event_data *edata) @@ -66,6 +83,8 @@ static int exynos_bus_get_event(struct exynos_bus *bus, unsigned long load_count = 0, total_count = 0; int i, ret = 0; + event_data.curr_freq = bus->curr_freq; + event_data.prev_time = bus->prev_time; for (i = 0; i < bus->edev_count; i++) { if (!bus->edev[i]) continue; diff --git a/include/linux/devfreq-event.h b/include/linux/devfreq-event.h index f14f17f8cb7f..b57ccfcb775b 100644 --- a/include/linux/devfreq-event.h +++ b/include/linux/devfreq-event.h @@ -41,12 +41,16 @@ struct devfreq_event_dev { * each count may represent a clock cycle, a time unit * (ns/us/...), or anything the device driver wants. * Generally, utilization is load_count / total_count. + * @prev_time : jiffies for interval calculations with polling. + * @curr_freq : current frequency for calculating max bandwidth. * * This structure contains the data of devfreq-event device for polling period. */ struct devfreq_event_data { unsigned long load_count; 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Fri, 24 Jan 2020 14:15:06 +0000 (GMT) From: Kamil Konieczny To: k.konieczny@samsung.com Cc: Bartlomiej Zolnierkiewicz , Chanwoo Choi , Krzysztof Kozlowski , Kukjin Kim , Kyungmin Park , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Marek Szyprowski , MyungJoo Ham Subject: [PATCH RESEND 3/3] PM / devfreq: exynos-nocp: change load and total calculations Date: Fri, 24 Jan 2020 15:14:49 +0100 Message-Id: <20200124141449.19844-4-k.konieczny@samsung.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200124141449.19844-1-k.konieczny@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrMKsWRmVeSWpSXmKPExsWy7djPc7qvf2vFGZzrMrXYOGM9q8X1L89Z LRZ8msFq0f/4NbPF+fMb2C3ONr1ht9j0+BqrxeVdc9gsPvceYbSYcX4fk8XaI3fZLW43rmBz 4PHYtKqTzWPzknqPvi2rGD0+b5ILYInisklJzcksSy3St0vgyrg+5TVLwS2lis5j/awNjMtl uhg5OSQETCTWflvP3MXIxSEksIJRYuKpJewQzhdGieuTGtkgnM+MErtv7GeEafm0ZjNUy3JG icVLTjPCtey5v5kdpIpNQF/i4NmTLCC2iIC0ROeiiUwgRcwCm5gl7r9+B5YQFoiWWL1tJ5jN IqAq8aNxITOIzStgI9F85y0TxDp5idmNp9lAbE4BW4lVZ1axQ9QISpyc+QSslxmopnnrbLCT JASWsUu8nHyTDaLZRWLp7UYWCFtY4tXxLewQtozE6ck9UPFyiacL+9ghmlsYJR60f4RKWEvc OfcLaBAH0AZNifW79CHCjhLHvrQwgoQlBPgkbrwVhLiBT2LStunMEGFeiY42IYhqVYnnp3qg XpGW6Pq/jhXC9pB4/OoX8wRGxVlIvpmF5JtZCHsXMDKvYhRPLS3OTU8tNspLLdcrTswtLs1L 10vOz93ECExKp/8d/7KDcdefpEOMAhyMSjy8M+5pxQmxJpYVV+YeYpTgYFYS4WUM04wT4k1J rKxKLcqPLyrNSS0+xCjNwaIkzmu86GWskEB6YklqdmpqQWoRTJaJg1OqgbHz1OOG3Wt49+3+ HfKxjvW/h5ZYzmvheYtvGa6vcjtV96cs7uLytd90Ou+k7Hood+Whn8exKa8/Sdg/ave3bDtp OqnhU5nfTtO9x/61W+UkpW0wW/RVJSBeZcqrpQXC6+eyy1h3aVz9JC2xgfVOsaiixpslK0xT r7/fuKNN4GP14derEqKWMhxUYinOSDTUYi4qTgQAVZdplEYDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprPIsWRmVeSWpSXmKPExsVy+t/xu7qvf2vFGdz6Lm2xccZ6VovrX56z Wiz4NIPVov/xa2aL8+c3sFucbXrDbrHp8TVWi8u75rBZfO49wmgx4/w+Jou1R+6yW9xuXMHm wOOxaVUnm8fmJfUefVtWMXp83iQXwBKlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hpoWdkYqlnaGwe a2VkqqRvZ5OSmpNZllqkb5egl3F9ymuWgltKFZ3H+lkbGJfLdDFyckgImEh8WrOZGcQWEljK KNH5yQ4iLi3ReHo1E4QtLPHnWhcbRM0nRonvx0JBbDYBfYmDZ0+ygNgiQPWdiyYC1XNxMAvs YpZYMW022FBhgUiJd23vwGwWAVWJH40LwWxeARuJ5jtvoRbIS8xuPA22gFPAVmLVmVXsEMts JKZsXcUIUS8ocXLmE7BlzED1zVtnM09gFJiFJDULSWoBI9MqRpHU0uLc9NxiI73ixNzi0rx0 veT83E2MwMjZduznlh2MXe+CDzEKcDAq8fA63NGKE2JNLCuuzD3EKMHBrCTCyximGSfEm5JY WZValB9fVJqTWnyI0RToiYnMUqLJ+cCoziuJNzQ1NLewNDQ3Njc2s1AS5+0QOBgjJJCeWJKa nZpakFoE08fEwSnVwHjNZYZsh83sab3Xa5w+MSTYbTl6Z7pUXPqxTROYaoJdjyz5Oc/2S1qP w3vf/qrvC7evSV1WvWdJub7mqu9hEauubbl7N2JS0pldBWna16ZJyldpOJ49cLumUbpZkj9H OfbKmicBPbslLeSFJ7xk+W9U18Jjo9PgcfbbUpNv4QsOJjQcUf956LoSS3FGoqEWc1FxIgAB VReisgIAAA== X-CMS-MailID: 20200124141507eucas1p115e87fdd6eda4a5f320d5145f5960889 X-Msg-Generator: CA X-RootMTR: 20200124141507eucas1p115e87fdd6eda4a5f320d5145f5960889 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200124141507eucas1p115e87fdd6eda4a5f320d5145f5960889 References: <20200124141449.19844-1-k.konieczny@samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org There are two problems with exynos-nocp driver. First one is reading bytes and cycle counters and comparing them one to one without taking into account wcore bus width. Second one is that cycle counter depends on DREX DRAM clock, not on wcore clock. The latter problem was exposed by commit 6e7674c3c6df5 ("memory: Add DMC driver for Exynos5422"), which changes DRAM clock depending on memory read/write pressure and when it gets at higher freqency, NoCP cycle counter also increases. Note that both of these problems was there before this commit. The proposed solution is to use byte counter from NoCP h/w registers for current wcore bandwidth calculations and derive max bandwidth from current frequency. While at it, change from bytes to kilobytes to avoid overflow in later calculations in exynos-bus and devfreq drivers. Also while at it, remove cycle counters setting and reading and extend dev_dbg with time interval in miliseconds, percent of load, raw counter value in hex. Signed-off-by: Kamil Konieczny --- drivers/devfreq/event/exynos-nocp.c | 61 ++++++++++++----------------- 1 file changed, 24 insertions(+), 37 deletions(-) diff --git a/drivers/devfreq/event/exynos-nocp.c b/drivers/devfreq/event/exynos-nocp.c index ebe9cdf94f54..979ec094cf26 100644 --- a/drivers/devfreq/event/exynos-nocp.c +++ b/drivers/devfreq/event/exynos-nocp.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -60,19 +61,6 @@ static int exynos_nocp_set_event(struct devfreq_event_dev *edev) if (ret < 0) goto out; - ret = regmap_update_bits(nocp->regmap, NOCP_COUNTERS_2_SRC, - NOCP_CNT_SRC_INTEVENT_MASK, - NOCP_CNT_SRC_INTEVENT_CYCLE_MASK); - if (ret < 0) - goto out; - - ret = regmap_update_bits(nocp->regmap, NOCP_COUNTERS_3_SRC, - NOCP_CNT_SRC_INTEVENT_MASK, - NOCP_CNT_SRC_INTEVENT_CHAIN_MASK); - if (ret < 0) - goto out; - - /* Set an alarm with a max/min value of 0 to generate StatALARM */ ret = regmap_write(nocp->regmap, NOCP_STAT_ALARM_MIN, 0x0); if (ret < 0) @@ -95,18 +83,6 @@ static int exynos_nocp_set_event(struct devfreq_event_dev *edev) if (ret < 0) goto out; - ret = regmap_update_bits(nocp->regmap, NOCP_COUNTERS_2_ALARM_MODE, - NOCP_CNT_ALARM_MODE_MASK, - NOCP_CNT_ALARM_MODE_MIN_MAX_MASK); - if (ret < 0) - goto out; - - ret = regmap_update_bits(nocp->regmap, NOCP_COUNTERS_3_ALARM_MODE, - NOCP_CNT_ALARM_MODE_MASK, - NOCP_CNT_ALARM_MODE_MIN_MAX_MASK); - if (ret < 0) - goto out; - /* Enable the measurements by setting AlarmEn and StatEn */ ret = regmap_update_bits(nocp->regmap, NOCP_MAIN_CTL, NOCP_MAIN_CTL_STATEN_MASK | NOCP_MAIN_CTL_ALARMEN_MASK, @@ -145,6 +121,7 @@ static int exynos_nocp_get_event(struct devfreq_event_dev *edev, { struct exynos_nocp *nocp = devfreq_event_get_drvdata(edev); unsigned int counter[4]; + unsigned long dt; int ret; /* Read cycle count */ @@ -156,19 +133,29 @@ static int exynos_nocp_get_event(struct devfreq_event_dev *edev, if (ret < 0) goto out; - ret = regmap_read(nocp->regmap, NOCP_COUNTERS_2_VAL, &counter[2]); - if (ret < 0) - goto out; - - ret = regmap_read(nocp->regmap, NOCP_COUNTERS_3_VAL, &counter[3]); - if (ret < 0) - goto out; - edata->load_count = ((counter[1] << 16) | counter[0]); - edata->total_count = ((counter[3] << 16) | counter[2]); - - dev_dbg(&edev->dev, "%s (event: %lu/%lu)\n", edev->desc->name, - edata->load_count, edata->total_count); + dt = jiffies_to_msecs((long)jiffies - (long)edata->prev_time); + if (dt == 0) + dt = 1; + + /* + * count load in kB/s + * load = load / 1000 * 1000 / dt + */ + edata->load_count = edata->load_count / dt; + + /* + * count max bandwidth in kB/s: + * bw = freq * ((bus width in bits / 8) / nr of mem channels) / 1000 + * where 128 bits / 8 bits per byte / 4 channels = 4 + * so it is: bw = freq * 4 / 1000 + */ + edata->total_count = edata->curr_freq / 250; + + dev_dbg(&edev->dev, "%s (event: %lu/%lu) %lums %lu%% 0x%08x\n", + edev->desc->name, edata->load_count, edata->total_count, dt, + edata->load_count * 100 / edata->total_count, + (counter[1] << 16) | counter[0]); return 0;