From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f45.google.com (mail-ej1-f45.google.com [209.85.218.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3443F7F5 for ; Wed, 27 Apr 2022 18:31:36 +0000 (UTC) Received: by mail-ej1-f45.google.com with SMTP id m20so5063658ejj.10 for ; Wed, 27 Apr 2022 11:31:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=6weLRPbBPe57uX8mMeORt7L2XcJU22sNULRsCXuuqBw=; b=PiczsENkZ+IGeiQ7DFmSWw8yPWNNVyv2Z6WiZwRZquvk+RNiNnBvL3HcWk7WAGiIrs F3A8AYKJCF8lLs1iNkRC5k+LP1pXir/b4IS/vb0HbmlOEKAKjJb2Y+l/WL0G8QpCM/3z eVJIXKZOtRSTPMOLXRDanzlayXynDkDdtu5fmwDe3RuTfqvBu7mWAgqeFCj0cDf67mvY NrydXtrfBCy6oG8N2F22EyOWbQNfVuKQ3Z+cilquh38PgWy0DaAh85N7w7D/TmAhz+bI drM/mRjxwyhYXCbnyDa4i1/GKREAjzUQUrofzA4ZR8gNnReMwGAxEFKiNmdLrztXwgEd rowg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=6weLRPbBPe57uX8mMeORt7L2XcJU22sNULRsCXuuqBw=; b=qEcNm0kRoeskTFJCB816GwnncgmNrDrt+ppCBPt54pi4KVTfQSWDEEUB0NyxMmkJq5 9wUdZ5SZV5DCAWJLOAJ8nA9T5rd86daQzSsGr78BRxOL6viisfp0eapW9CdvfYLmeYhy kiuIDntrHQ3sgPm90XUYSnSNNq2XdTC2NXfwI4hFMVFJeKZyytKhcOLv9JeXAk37PccO oOYqDpEmb6T/Jp991IM7wFbtgNbLv0eDnLM8bKk8wgTUcU2ydGGZ5bWRMhWnDhFLrvvM wRk9T4Kw/Y6bdFAPDAvJIlcS5DHnRQJZgM6qVKwTwi8yD/asmWy2eAmedrxhbvAKGvmV UkfQ== X-Gm-Message-State: AOAM532YW7AMdgGvhRc6KRuskUvBjQixi/XR199fZ/ptF46A9apRSkhm nyeZMDczmncwQ5Ut2lPW4aE= X-Google-Smtp-Source: ABdhPJzOCctqhaZ1rAdSx0HEdgoTqOncuYDpDoFARLqN9WUF0CuaH4PfNeKCKcg+QQnLuF6Fb9lzdg== X-Received: by 2002:a17:907:7215:b0:6f3:98da:a823 with SMTP id dr21-20020a170907721500b006f398daa823mr15354929ejc.284.1651084294402; Wed, 27 Apr 2022 11:31:34 -0700 (PDT) Received: from jernej-laptop.localnet (89-212-118-115.static.t-2.net. [89.212.118.115]) by smtp.gmail.com with ESMTPSA id s11-20020a170906284b00b006e108693850sm6989840ejc.28.2022.04.27.11.31.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Apr 2022 11:31:33 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, Paul Kocialkowski Cc: Yong Deng , Paul Kocialkowski , Mauro Carvalho Chehab , Chen-Yu Tsai , Samuel Holland , Laurent Pinchart , Maxime Ripard , Thomas Petazzoni Subject: Re: [PATCH v4 06/45] media: sun6i-csi: Use runtime pm for clocks and reset Date: Wed, 27 Apr 2022 20:31:32 +0200 Message-ID: <2625748.mvXUDI8C0e@jernej-laptop> In-Reply-To: <20220415152811.636419-7-paul.kocialkowski@bootlin.com> References: <20220415152811.636419-1-paul.kocialkowski@bootlin.com> <20220415152811.636419-7-paul.kocialkowski@bootlin.com> Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Hi! Dne petek, 15. april 2022 ob 17:27:32 CEST je Paul Kocialkowski napisal(a): > Wrap the clock and reset preparation into runtime pm functions > for better organization of the code. Also fix the clock and > reset enable order to first deassert reset, as recommended in > Allwinner litterature. s/litterature/literature/ Otherwise, Reviewed-by: Jernej Skrabec Best regards, Jernej > > Make the driver depend on PM while at it since runtime pm is > mandatory for the driver to work. > > Signed-off-by: Paul Kocialkowski > --- > .../media/platform/sunxi/sun6i-csi/Kconfig | 2 +- > .../platform/sunxi/sun6i-csi/sun6i_csi.c | 84 +++++++++++++------ > 2 files changed, 60 insertions(+), 26 deletions(-) > > diff --git a/drivers/media/platform/sunxi/sun6i-csi/Kconfig > b/drivers/media/platform/sunxi/sun6i-csi/Kconfig index > 0345901617d4..965fbd937841 100644 > --- a/drivers/media/platform/sunxi/sun6i-csi/Kconfig > +++ b/drivers/media/platform/sunxi/sun6i-csi/Kconfig > @@ -2,7 +2,7 @@ > config VIDEO_SUN6I_CSI > tristate "Allwinner V3s Camera Sensor Interface driver" > depends on V4L_PLATFORM_DRIVERS > - depends on VIDEO_DEV && COMMON_CLK && HAS_DMA > + depends on VIDEO_DEV && COMMON_CLK && HAS_DMA && PM > depends on ARCH_SUNXI || COMPILE_TEST > select MEDIA_CONTROLLER > select VIDEO_V4L2_SUBDEV_API > diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c > b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index > 46d92b925cc8..dcc9e7a125e2 100644 > --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c > +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c > @@ -152,40 +152,18 @@ int sun6i_csi_set_power(struct sun6i_csi_device > *csi_dev, bool enable) > > if (!enable) { > regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0); > + pm_runtime_put(dev); > > - clk_disable_unprepare(csi_dev->clock_ram); > - clk_disable_unprepare(csi_dev->clock_mod); > - reset_control_assert(csi_dev->reset); > return 0; > } > > - ret = clk_prepare_enable(csi_dev->clock_mod); > - if (ret) { > - dev_err(csi_dev->dev, "Enable csi clk err %d\n", ret); > + ret = pm_runtime_resume_and_get(dev); > + if (ret < 0) > return ret; > - } > - > - ret = clk_prepare_enable(csi_dev->clock_ram); > - if (ret) { > - dev_err(csi_dev->dev, "Enable clk_dram_csi clk err %d\n", ret); > - goto clk_mod_disable; > - } > - > - ret = reset_control_deassert(csi_dev->reset); > - if (ret) { > - dev_err(csi_dev->dev, "reset err %d\n", ret); > - goto clk_ram_disable; > - } > > regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, CSI_EN_CSI_EN); > > return 0; > - > -clk_ram_disable: > - clk_disable_unprepare(csi_dev->clock_ram); > -clk_mod_disable: > - clk_disable_unprepare(csi_dev->clock_mod); > - return ret; > } > > static enum csi_input_fmt get_csi_input_format(struct sun6i_csi_device > *csi_dev, @@ -800,6 +778,56 @@ static irqreturn_t sun6i_csi_interrupt(int > irq, void *private) return IRQ_HANDLED; > } > > +static int sun6i_csi_suspend(struct device *dev) > +{ > + struct sun6i_csi_device *csi_dev = dev_get_drvdata(dev); > + > + reset_control_assert(csi_dev->reset); > + clk_disable_unprepare(csi_dev->clock_ram); > + clk_disable_unprepare(csi_dev->clock_mod); > + > + return 0; > +} > + > +static int sun6i_csi_resume(struct device *dev) > +{ > + struct sun6i_csi_device *csi_dev = dev_get_drvdata(dev); > + int ret; > + > + ret = reset_control_deassert(csi_dev->reset); > + if (ret) { > + dev_err(dev, "failed to deassert reset\n"); > + return ret; > + } > + > + ret = clk_prepare_enable(csi_dev->clock_mod); > + if (ret) { > + dev_err(dev, "failed to enable module clock\n"); > + goto error_reset; > + } > + > + ret = clk_prepare_enable(csi_dev->clock_ram); > + if (ret) { > + dev_err(dev, "failed to enable ram clock\n"); > + goto error_clock_mod; > + } > + > + return 0; > + > +error_clock_mod: > + clk_disable_unprepare(csi_dev->clock_mod); > + > +error_reset: > + reset_control_assert(csi_dev->reset); > + > + return ret; > +} > + > +static const struct dev_pm_ops sun6i_csi_pm_ops = { > + .runtime_suspend = sun6i_csi_suspend, > + .runtime_resume = sun6i_csi_resume, > +}; > + > static const struct regmap_config sun6i_csi_regmap_config = { > .reg_bits = 32, > .reg_stride = 4, > @@ -879,6 +907,10 @@ static int sun6i_csi_resources_setup(struct > sun6i_csi_device *csi_dev, goto error_clock_rate_exclusive; > } > > + /* Runtime PM */ > + > + pm_runtime_enable(dev); > + > return 0; > > error_clock_rate_exclusive: > @@ -889,6 +921,7 @@ static int sun6i_csi_resources_setup(struct > sun6i_csi_device *csi_dev, > > static void sun6i_csi_resources_cleanup(struct sun6i_csi_device *csi_dev) > { > + pm_runtime_disable(csi_dev->dev); > clk_rate_exclusive_put(csi_dev->clock_mod); > } > > @@ -971,6 +1004,7 @@ static struct platform_driver sun6i_csi_platform_driver > = { .driver = { > .name = SUN6I_CSI_NAME, > .of_match_table = of_match_ptr(sun6i_csi_of_match), > + .pm = &sun6i_csi_pm_ops, > }, > }; 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 C20C1C433F5 for ; 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[89.212.118.115]) by smtp.gmail.com with ESMTPSA id s11-20020a170906284b00b006e108693850sm6989840ejc.28.2022.04.27.11.31.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Apr 2022 11:31:33 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, Paul Kocialkowski Cc: Yong Deng , Paul Kocialkowski , Mauro Carvalho Chehab , Chen-Yu Tsai , Samuel Holland , Laurent Pinchart , Maxime Ripard , Thomas Petazzoni Subject: Re: [PATCH v4 06/45] media: sun6i-csi: Use runtime pm for clocks and reset Date: Wed, 27 Apr 2022 20:31:32 +0200 Message-ID: <2625748.mvXUDI8C0e@jernej-laptop> In-Reply-To: <20220415152811.636419-7-paul.kocialkowski@bootlin.com> References: <20220415152811.636419-1-paul.kocialkowski@bootlin.com> <20220415152811.636419-7-paul.kocialkowski@bootlin.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220427_113137_554317_0AE6990E X-CRM114-Status: GOOD ( 27.63 ) 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 Hi! Dne petek, 15. april 2022 ob 17:27:32 CEST je Paul Kocialkowski napisal(a): > Wrap the clock and reset preparation into runtime pm functions > for better organization of the code. Also fix the clock and > reset enable order to first deassert reset, as recommended in > Allwinner litterature. s/litterature/literature/ Otherwise, Reviewed-by: Jernej Skrabec Best regards, Jernej > > Make the driver depend on PM while at it since runtime pm is > mandatory for the driver to work. > > Signed-off-by: Paul Kocialkowski > --- > .../media/platform/sunxi/sun6i-csi/Kconfig | 2 +- > .../platform/sunxi/sun6i-csi/sun6i_csi.c | 84 +++++++++++++------ > 2 files changed, 60 insertions(+), 26 deletions(-) > > diff --git a/drivers/media/platform/sunxi/sun6i-csi/Kconfig > b/drivers/media/platform/sunxi/sun6i-csi/Kconfig index > 0345901617d4..965fbd937841 100644 > --- a/drivers/media/platform/sunxi/sun6i-csi/Kconfig > +++ b/drivers/media/platform/sunxi/sun6i-csi/Kconfig > @@ -2,7 +2,7 @@ > config VIDEO_SUN6I_CSI > tristate "Allwinner V3s Camera Sensor Interface driver" > depends on V4L_PLATFORM_DRIVERS > - depends on VIDEO_DEV && COMMON_CLK && HAS_DMA > + depends on VIDEO_DEV && COMMON_CLK && HAS_DMA && PM > depends on ARCH_SUNXI || COMPILE_TEST > select MEDIA_CONTROLLER > select VIDEO_V4L2_SUBDEV_API > diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c > b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index > 46d92b925cc8..dcc9e7a125e2 100644 > --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c > +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c > @@ -152,40 +152,18 @@ int sun6i_csi_set_power(struct sun6i_csi_device > *csi_dev, bool enable) > > if (!enable) { > regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0); > + pm_runtime_put(dev); > > - clk_disable_unprepare(csi_dev->clock_ram); > - clk_disable_unprepare(csi_dev->clock_mod); > - reset_control_assert(csi_dev->reset); > return 0; > } > > - ret = clk_prepare_enable(csi_dev->clock_mod); > - if (ret) { > - dev_err(csi_dev->dev, "Enable csi clk err %d\n", ret); > + ret = pm_runtime_resume_and_get(dev); > + if (ret < 0) > return ret; > - } > - > - ret = clk_prepare_enable(csi_dev->clock_ram); > - if (ret) { > - dev_err(csi_dev->dev, "Enable clk_dram_csi clk err %d\n", ret); > - goto clk_mod_disable; > - } > - > - ret = reset_control_deassert(csi_dev->reset); > - if (ret) { > - dev_err(csi_dev->dev, "reset err %d\n", ret); > - goto clk_ram_disable; > - } > > regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, CSI_EN_CSI_EN); > > return 0; > - > -clk_ram_disable: > - clk_disable_unprepare(csi_dev->clock_ram); > -clk_mod_disable: > - clk_disable_unprepare(csi_dev->clock_mod); > - return ret; > } > > static enum csi_input_fmt get_csi_input_format(struct sun6i_csi_device > *csi_dev, @@ -800,6 +778,56 @@ static irqreturn_t sun6i_csi_interrupt(int > irq, void *private) return IRQ_HANDLED; > } > > +static int sun6i_csi_suspend(struct device *dev) > +{ > + struct sun6i_csi_device *csi_dev = dev_get_drvdata(dev); > + > + reset_control_assert(csi_dev->reset); > + clk_disable_unprepare(csi_dev->clock_ram); > + clk_disable_unprepare(csi_dev->clock_mod); > + > + return 0; > +} > + > +static int sun6i_csi_resume(struct device *dev) > +{ > + struct sun6i_csi_device *csi_dev = dev_get_drvdata(dev); > + int ret; > + > + ret = reset_control_deassert(csi_dev->reset); > + if (ret) { > + dev_err(dev, "failed to deassert reset\n"); > + return ret; > + } > + > + ret = clk_prepare_enable(csi_dev->clock_mod); > + if (ret) { > + dev_err(dev, "failed to enable module clock\n"); > + goto error_reset; > + } > + > + ret = clk_prepare_enable(csi_dev->clock_ram); > + if (ret) { > + dev_err(dev, "failed to enable ram clock\n"); > + goto error_clock_mod; > + } > + > + return 0; > + > +error_clock_mod: > + clk_disable_unprepare(csi_dev->clock_mod); > + > +error_reset: > + reset_control_assert(csi_dev->reset); > + > + return ret; > +} > + > +static const struct dev_pm_ops sun6i_csi_pm_ops = { > + .runtime_suspend = sun6i_csi_suspend, > + .runtime_resume = sun6i_csi_resume, > +}; > + > static const struct regmap_config sun6i_csi_regmap_config = { > .reg_bits = 32, > .reg_stride = 4, > @@ -879,6 +907,10 @@ static int sun6i_csi_resources_setup(struct > sun6i_csi_device *csi_dev, goto error_clock_rate_exclusive; > } > > + /* Runtime PM */ > + > + pm_runtime_enable(dev); > + > return 0; > > error_clock_rate_exclusive: > @@ -889,6 +921,7 @@ static int sun6i_csi_resources_setup(struct > sun6i_csi_device *csi_dev, > > static void sun6i_csi_resources_cleanup(struct sun6i_csi_device *csi_dev) > { > + pm_runtime_disable(csi_dev->dev); > clk_rate_exclusive_put(csi_dev->clock_mod); > } > > @@ -971,6 +1004,7 @@ static struct platform_driver sun6i_csi_platform_driver > = { .driver = { > .name = SUN6I_CSI_NAME, > .of_match_table = of_match_ptr(sun6i_csi_of_match), > + .pm = &sun6i_csi_pm_ops, > }, > }; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel