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Tue, 13 Aug 2019 06:15:59 +0000 (GMT) Subject: Re: [RFC PATCH 00/11] Simple QoS for exynos-bus driver using interconnect From: Chanwoo Choi To: =?UTF-8?B?QXJ0dXIgxZp3aWdvxYQ=?= , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: krzk@kernel.org, myungjoo.ham@samsung.com, inki.dae@samsung.com, sw0312.kim@samsung.com, georgi.djakov@linaro.org, m.szyprowski@samsung.com Organization: Samsung Electronics Message-ID: <08be4ed8-5a6c-e0da-61a3-ca7b9fa61aab@samsung.com> Date: Tue, 13 Aug 2019 15:19:46 +0900 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <6be31199-a93d-c440-e0cd-7453e3ac1648@samsung.com> Content-Language: en-US Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrDJsWRmVeSWpSXmKPExsWy7bCmvu6C0KBYg5utBhaHjm1lt5h/5Byr xZWv79kspu/dxGYx6f4EFovz5zewW2x6fI3V4vKuOWwWn3uPMFrMOL+PyWLtkbvsFrcbV7BZ zJj8ks2B12PTqk42jzvX9rB53O8+zuSxeUm9x8F3e5g8+rasYvT4vEkugD0q2yYjNTEltUgh NS85PyUzL91WyTs43jne1MzAUNfQ0sJcSSEvMTfVVsnFJ0DXLTMH6FolhbLEnFKgUEBicbGS vp1NUX5pSapCRn5xia1SakFKToFlgV5xYm5xaV66XnJ+rpWhgYGRKVBhQnbG9o5O1oLpihXt Z7azNzC2SncxcnJICJhIzDx/lLGLkYtDSGAHo8Tly9fYIJxPjBKTv22DynxjlPjSu5oFpqXl 3G+oqr2MEt/OnmcDSQgJvAdyjleB2MICIRLHN39lBLHZBLQk9r+4AVYjItDOJNG80QGkmVlg IqPE8+P/mUAS/AKKEld/PAZr4BWwk/izZBtQnIODRUBV4u1CEZCwqECExKcHh1khSgQlTs58 AnYQp4C9xKW768BamQXEJW49mc8EYctLNG+dzQyyS0JgHbvElWNLmSE+cJHoPHuBCcIWlnh1 fAs7hC0l8fndXjYIu1pi5ckjbBDNHYwSW/ZfYIVIGEvsXzoZ7DhmAU2J9bv0IcKKEjt/z4U6 gk/i3dceVpASCQFeiY42IYgSZYnLD+5CrZWUWNzeyTaBUWkWkndmIXlhFpIXZiEsW8DIsopR LLWgODc9tdiwwBg5tjcxglOylvkOxg3nfA4xCnAwKvHwViQExgqxJpYVV+YeYpTgYFYS4b1k EhQrxJuSWFmVWpQfX1Sak1p8iNEUGNgTmaVEk/OB+SKvJN7Q1MjY2NjCxNDM1NBQSZx34Q+L WCGB9MSS1OzU1ILUIpg+Jg5OqQbG/r9bl8ZKzfs/+/O3zMVyZ4XsZDUXXZobbVN8YGtUfN9H G/tz/3MDT/9c+mbSzVDeiUrOXql3Ij5E7dBZtC5p6+K78yc4Wz/Z9KkjLslL/WAk+82p4m5/ dl5dwFhs6S5WNdt76pJdF8R7/kyapWfCz9JsJR/3S1va+mFZRPLmKWzWuutvrOReoMRSnJFo qMVcVJwIAPbeD6ffAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrBIsWRmVeSWpSXmKPExsWy7bCSnO6C0KBYgxetAhaHjm1lt5h/5Byr xZWv79kspu/dxGYx6f4EFovz5zewW2x6fI3V4vKuOWwWn3uPMFrMOL+PyWLtkbvsFrcbV7BZ zJj8ks2B12PTqk42jzvX9rB53O8+zuSxeUm9x8F3e5g8+rasYvT4vEkugD2KyyYlNSezLLVI 3y6BK2N7RydrwXTFivYz29kbGFuluxg5OSQETCRazv1m62Lk4hAS2M0ocf/2AkaIhKTEtItH mbsYOYBsYYnDh4shat4ySjy7NJ8NpEZYIETi+OavYPVsAloS+1/cABskItDOJNHdupURxGEW mMgo8fjwWmaI9lOMEv+P9oG18AsoSlz98RjM5hWwk/izZBsTyDoWAVWJtwtFQMKiAhESh3fM gioRlDg58wkLiM0pYC9x6e46sDizgLrEn3mXmCFscYlbT+YzQdjyEs1bZzNPYBSehaR9FpKW WUhaZiFpWcDIsopRMrWgODc9t9iwwDAvtVyvODG3uDQvXS85P3cTIzg+tTR3MF5eEn+IUYCD UYmHtyIhMFaINbGsuDL3EKMEB7OSCO8lk6BYId6UxMqq1KL8+KLSnNTiQ4zSHCxK4rxP845F CgmkJ5akZqemFqQWwWSZODilGhjD1tVfl+cyvViyNtHtyYYNdzZ7KFdMcBVmz3r4rGv+QTk7 hjkqCrNOtE49EZfy5saDFM1b0icvK1+NjtvFGy/z//T6tXNvXXG/87ApPCfW8674hCPnp0V3 Tzg0i/E098LXMW+qhD51aymX7o3pOMdltKYg2Eb4dISZDN+MJx1u6+95F5+O4/ynxFKckWio xVxUnAgAVept3MsCAAA= X-CMS-MailID: 20190813061600epcas1p33ce1749e852497ea8d2093f978bb16f8 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20190723122022eucas1p2f568f74f981f9de9012eb693c3b446d5 References: <20190723122016.30279-1-a.swigon@partner.samsung.com> <6be31199-a93d-c440-e0cd-7453e3ac1648@samsung.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Artur, On 19. 8. 13. 오후 3:17, Chanwoo Choi wrote: > Hi Artur. > > The patch1-4 in this series depend on other patches[1] on mainline. > On next v2 version, please make some patches based on patches[1] > in order to prevent the merge conflict. > > [1] [RESEND PATCH v5 0/4] add coupled regulators for Exynos5422/5800 > - https://protect2.fireeye.com/url?k=4f35944fb07b6ba2.4f341f00-9498e831e3c86bfb&u=https://lkml.org/lkml/2019/8/8/217 Add correct reference url as following: - https://lkml.org/lkml/2019/8/8/217 > > Also, as I commented, we better to discuss it before sending the v2. > > On 19. 7. 23. 오후 9:20, Artur Świgoń wrote: >> The following patchset adds interconnect[1][2] framework support to the >> exynos-bus devfreq driver. Extending the devfreq driver with interconnect >> capabilities started as a response to the issue referenced in [3]. The >> patches can be subdivided into four logical groups: >> >> (a) Refactoring the existing devfreq driver in order to improve readability >> and accommodate for adding new code (patches 01--04/11). >> >> (b) Tweaking the interconnect framework to support the exynos-bus use case >> (patches 05--07/11). Exporting of_icc_get_from_provider() allows us to >> avoid hardcoding every single graph edge in the DT or driver source, and >> relaxing the requirement contained in that function removes the need to >> provide dummy node IDs in the DT. Adjusting the logic in >> apply_constraints() (drivers/interconnect/core.c) accounts for the fact >> that every bus is a separate entity and therefore a separate interconnect >> provider, albeit constituting a part of a larger hierarchy. >> >> (c) Implementing interconnect providers in the exynos-bus devfreq driver >> and adding required DT properties for one selected platform, namely >> Exynos4412 (patches 08--09/11). Due to the fact that this aims to be a >> generic driver for various Exynos SoCs, node IDs are generated dynamically >> rather than hardcoded. This has been determined to be a simpler approach, >> but depends on changes described in (b). >> >> (d) Implementing a sample interconnect consumer for exynos-mixer targeted >> at the issue referenced in [3], again with DT info only for Exynos4412 >> (patches 10--11/11). >> >> Integration of devfreq and interconnect functionalities comes down to one >> extra line in the devfreq target() callback, which selects either the >> frequency calculated by the devfreq governor, or the one requested with the >> interconnect API, whichever is higher. All new code works equally well when >> CONFIG_INTERCONNECT is 'n' (as in exynos_defconfig) in which case all >> interconnect API functions are no-ops. >> >> --- >> Artur Świgoń >> Samsung R&D Institute Poland >> Samsung Electronics >> >> --- >> References: >> [1] Documentation/interconnect/interconnect.rst >> [2] Documentation/devicetree/bindings/interconnect/interconnect.txt >> [3] https://patchwork.kernel.org/patch/10861757 >> >> Artur Świgoń (10): >> devfreq: exynos-bus: Extract exynos_bus_profile_init() >> devfreq: exynos-bus: Extract exynos_bus_profile_init_passive() >> devfreq: exynos-bus: Change goto-based logic to if-else logic >> devfreq: exynos-bus: Clean up code >> icc: Export of_icc_get_from_provider() >> icc: Relax requirement in of_icc_get_from_provider() >> icc: Relax condition in apply_constraints() >> arm: dts: exynos: Add parents and #interconnect-cells to Exynos4412 >> devfreq: exynos-bus: Add interconnect functionality to exynos-bus >> arm: dts: exynos: Add interconnects to Exynos4412 mixer >> >> Marek Szyprowski (1): >> drm: exynos: mixer: Add interconnect support >> >> .../boot/dts/exynos4412-odroid-common.dtsi | 1 + >> arch/arm/boot/dts/exynos4412.dtsi | 10 + >> drivers/devfreq/exynos-bus.c | 296 ++++++++++++++---- >> drivers/gpu/drm/exynos/exynos_mixer.c | 68 +++- >> drivers/interconnect/core.c | 12 +- >> include/linux/interconnect-provider.h | 6 + >> 6 files changed, 314 insertions(+), 79 deletions(-) >> > > -- Best Regards, Chanwoo Choi Samsung Electronics 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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by 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20190813061600epsmtrp26ed9a09a69ca14b0dbc75289b4cb9ad4~6ZuZwe2k82316323163epsmtrp2r; Tue, 13 Aug 2019 06:16:00 +0000 (GMT) X-AuditID: b6c32a37-e3fff70000000fe2-e2-5d5255a015ec Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id BF.93.03706.0A5525D5; Tue, 13 Aug 2019 15:16:00 +0900 (KST) Received: from [10.113.221.102] (unknown [10.113.221.102]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20190813061559epsmtip1b78be1b5e0d8cf3a5a94bc24d44a8371~6ZuZX6mMb2327223272epsmtip1P; Tue, 13 Aug 2019 06:15:59 +0000 (GMT) Subject: Re: [RFC PATCH 00/11] Simple QoS for exynos-bus driver using interconnect From: Chanwoo Choi To: =?UTF-8?B?QXJ0dXIgxZp3aWdvxYQ=?= , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org Organization: Samsung Electronics Message-ID: <08be4ed8-5a6c-e0da-61a3-ca7b9fa61aab@samsung.com> Date: Tue, 13 Aug 2019 15:19:46 +0900 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <6be31199-a93d-c440-e0cd-7453e3ac1648@samsung.com> Content-Language: en-US X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrDJsWRmVeSWpSXmKPExsWy7bCmvu6C0KBYg5utBhaHjm1lt5h/5Byr xZWv79kspu/dxGYx6f4EFovz5zewW2x6fI3V4vKuOWwWn3uPMFrMOL+PyWLtkbvsFrcbV7BZ zJj8ks2B12PTqk42jzvX9rB53O8+zuSxeUm9x8F3e5g8+rasYvT4vEkugD0q2yYjNTEltUgh NS85PyUzL91WyTs43jne1MzAUNfQ0sJcSSEvMTfVVsnFJ0DXLTMH6FolhbLEnFKgUEBicbGS vp1NUX5pSapCRn5xia1SakFKToFlgV5xYm5xaV66XnJ+rpWhgYGRKVBhQnbG9o5O1oLpihXt Z7azNzC2SncxcnJICJhIzDx/lLGLkYtDSGAHo8Tly9fYIJxPjBKTv22DynxjlPjSu5oFpqXl 3G+oqr2MEt/OnmcDSQgJvAdyjleB2MICIRLHN39lBLHZBLQk9r+4AVYjItDOJNG80QGkmVlg IqPE8+P/mUAS/AKKEld/PAZr4BWwk/izZBtQnIODRUBV4u1CEZCwqECExKcHh1khSgQlTs58 AnYQp4C9xKW768BamQXEJW49mc8EYctLNG+dzQyyS0JgHbvElWNLmSE+cJHoPHuBCcIWlnh1 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