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ziggy.stardust ([37.223.141.54]) by smtp.gmail.com with ESMTPSA id r11sm3580491ejr.57.2019.06.20.08.20.02 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Thu, 20 Jun 2019 08:20:03 -0700 (PDT) Subject: Re: [PATCH v2 05/12] media: mtk-jpeg: Get rid of mtk_smi_larb_get/put To: Yong Wu , Joerg Roedel , Rob Herring Cc: Evan Green , Robin Murphy , Tomasz Figa , Will Deacon , linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, yingjoe.chen@mediatek.com, youlin.pei@mediatek.com, Nicolas Boichat , anan.sun@mediatek.com, Rick Chang References: <1560171313-28299-1-git-send-email-yong.wu@mediatek.com> <1560171313-28299-6-git-send-email-yong.wu@mediatek.com> From: Matthias Brugger Openpgp: preference=signencrypt Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= 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<6539751d-1751-f309-1c51-b3f9576c1b99@gmail.com> Date: Thu, 20 Jun 2019 17:20:01 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <1560171313-28299-6-git-send-email-yong.wu@mediatek.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/06/2019 14:55, Yong Wu wrote: > MediaTek IOMMU has already added device_link between the consumer > and smi-larb device. If the jpg device call the pm_runtime_get_sync, > the smi-larb's pm_runtime_get_sync also be called automatically. Please help me out find this relation. I seem to miss something basic, because I can't find any between the jpeg IP and the iommu. Regards, Matthias > > CC: Rick Chang > Signed-off-by: Yong Wu > Reviewed-by: Evan Green > --- > drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 22 ---------------------- > drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h | 2 -- > 2 files changed, 24 deletions(-) > > diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c > index f761e4d..2f37538 100644 > --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c > +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c > @@ -29,7 +29,6 @@ > #include > #include > #include > -#include > > #include "mtk_jpeg_hw.h" > #include "mtk_jpeg_core.h" > @@ -901,11 +900,6 @@ static int mtk_jpeg_queue_init(void *priv, struct vb2_queue *src_vq, > > static void mtk_jpeg_clk_on(struct mtk_jpeg_dev *jpeg) > { > - int ret; > - > - ret = mtk_smi_larb_get(jpeg->larb); > - if (ret) > - dev_err(jpeg->dev, "mtk_smi_larb_get larbvdec fail %d\n", ret); > clk_prepare_enable(jpeg->clk_jdec_smi); > clk_prepare_enable(jpeg->clk_jdec); > } > @@ -914,7 +908,6 @@ static void mtk_jpeg_clk_off(struct mtk_jpeg_dev *jpeg) > { > clk_disable_unprepare(jpeg->clk_jdec); > clk_disable_unprepare(jpeg->clk_jdec_smi); > - mtk_smi_larb_put(jpeg->larb); > } > > static irqreturn_t mtk_jpeg_dec_irq(int irq, void *priv) > @@ -1059,21 +1052,6 @@ static int mtk_jpeg_release(struct file *file) > > static int mtk_jpeg_clk_init(struct mtk_jpeg_dev *jpeg) > { > - struct device_node *node; > - struct platform_device *pdev; > - > - node = of_parse_phandle(jpeg->dev->of_node, "mediatek,larb", 0); > - if (!node) > - return -EINVAL; > - pdev = of_find_device_by_node(node); > - if (WARN_ON(!pdev)) { > - of_node_put(node); > - return -EINVAL; > - } > - of_node_put(node); > - > - jpeg->larb = &pdev->dev; > - > jpeg->clk_jdec = devm_clk_get(jpeg->dev, "jpgdec"); > if (IS_ERR(jpeg->clk_jdec)) > return PTR_ERR(jpeg->clk_jdec); > diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h > index 1a6cdfd..e35fb79 100644 > --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h > +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h > @@ -55,7 +55,6 @@ enum mtk_jpeg_ctx_state { > * @dec_reg_base: JPEG registers mapping > * @clk_jdec: JPEG hw working clock > * @clk_jdec_smi: JPEG SMI bus clock > - * @larb: SMI device > */ > struct mtk_jpeg_dev { > struct mutex lock; > @@ -69,7 +68,6 @@ struct mtk_jpeg_dev { > void __iomem *dec_reg_base; > struct clk *clk_jdec; > struct clk *clk_jdec_smi; > - struct device *larb; > }; > > /** >