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Sun, 23 Jun 2019 23:36:33 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20190623233633epsmtrp192a9eade0fcbece0e6e69272d2ecd321~q_BXtjTUt1920219202epsmtrp1c; Sun, 23 Jun 2019 23:36:33 +0000 (GMT) X-AuditID: b6c32a39-8b7ff7000000100c-4a-5d100d02d9e1 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id C9.12.03692.10D001D5; Mon, 24 Jun 2019 08:36:33 +0900 (KST) Received: from [10.113.221.102] (unknown [10.113.221.102]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20190623233633epsmtip1364fbdd2bc629b95785e2adfcd77b4c0~q_BXdmHmE3204032040epsmtip1G; Sun, 23 Jun 2019 23:36:33 +0000 (GMT) Subject: Re: [PATCH v3] arm64: defconfig: Enable Panfrost and Lima drivers To: Krzysztof Kozlowski , cwchoi00@gmail.com Cc: Catalin Marinas , Will Deacon , Shawn Guo , Maxime Ripard , Olof Johansson , Jagan Teki , Simon Horman , Leonard Crestez , Bjorn Andersson , Dinh Nguyen , Enric Balletbo i Serra , linux-arm-kernel , linux-kernel , Vasily Khoruzhick , Marek Szyprowski , linux-samsung-soc From: Chanwoo Choi Organization: Samsung Electronics Message-ID: <6edbe882-314c-85e1-4109-7c3b324dc7ab@samsung.com> Date: Mon, 24 Jun 2019 08:39:09 +0900 User-Agent: Mozilla/5.0 (X11; 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charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20190623192007epcas4p2a3995bb00091b436562828fceb6ff790 References: <20190621180208.25361-7-krzk@kernel.org> <20190622191838.29850-1-krzk@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 19. 6. 24. 오전 4:16, Krzysztof Kozlowski wrote: > On Sun, 23 Jun 2019 at 06:31, Chanwoo Choi wrote: >> >> Hi Krzysztof, >> >> 2019년 6월 23일 (일) 오전 4:20, Krzysztof Kozlowski 님이 작성: >>> >>> Enable support for Mali GPU with Panfrost and Lima drivers for: >>> 1. Samsung Exynos5433 and Exynos7 (having Mali T760), >>> 2. Allwiner A64 and H5 (Mali 400/450). >>> >>> Signed-off-by: Krzysztof Kozlowski >>> >>> --- >>> >>> Changes since v1: >>> 1. Enable Lima driver >>> --- >>> arch/arm64/configs/defconfig | 3 ++- >>> 1 file changed, 2 insertions(+), 1 deletion(-) >>> >>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig >>> index fbbc065415d4..3d31611368af 100644 >>> --- a/arch/arm64/configs/defconfig >>> +++ b/arch/arm64/configs/defconfig >>> @@ -518,6 +518,8 @@ CONFIG_DRM_HISI_HIBMC=m >>> CONFIG_DRM_HISI_KIRIN=m >>> CONFIG_DRM_MESON=m >>> CONFIG_DRM_PL111=m >>> +CONFIG_DRM_LIMA=m >>> +CONFIG_DRM_PANFROST=m >>> CONFIG_FB=y >>> CONFIG_FB_MODE_HELPERS=y >>> CONFIG_BACKLIGHT_GENERIC=m >>> @@ -718,7 +720,6 @@ CONFIG_ARCH_TEGRA_194_SOC=y >>> CONFIG_ARCH_K3_AM6_SOC=y >>> CONFIG_SOC_TI=y >>> CONFIG_TI_SCI_PM_DOMAINS=y >>> -CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND=y >> >> Exynos5433-tm2 board support the exynos-bus device which >> used the simple_ondmenad governor of devfreq. >> Why do you remove this configuration from the defconfig? > > It is selected by default by DRM_PANFROST. The difference is that > PANFROST selects it as module. The 'y' is chosen because of: > SCSI_UFSHCD [=y] && SCSI_LOWLEVEL [=y] && SCSI [=y] && SCSI_DMA [=y] When I tried to find the history of CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND for defconfig, the following patch[1] added this configuration. [1] b972ff75f2938c39e2205c23ea0e531d36b27f86 - "arm64: defconfig: Enable UFS on msm8996" I think that this patch will affect the opration of 'USF on msm8998'. -- Best Regards, Chanwoo Choi Samsung Electronics