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Wed, 14 Jul 2021 08:44:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2lAJFRsVBXcI for ; Wed, 14 Jul 2021 08:44:09 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by smtp2.osuosl.org (Postfix) with ESMTPS id 0808F4021A for ; Wed, 14 Jul 2021 08:44:08 +0000 (UTC) Received: from [IPv6:2a02:810a:880:f54:e49e:3ed0:1a77:5623] (unknown [IPv6:2a02:810a:880:f54:e49e:3ed0:1a77:5623]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: dafna) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 42F781F42B41; Wed, 14 Jul 2021 09:44:04 +0100 (BST) Subject: Re: [PATCH v6 06/11] drm/mediatek: Add pm runtime support for ovl and rdma To: Yong Wu , Matthias Brugger , Joerg Roedel , Rob Herring , Krzysztof Kozlowski , David Airlie , Mauro Carvalho Chehab References: <20210714025626.5528-1-yong.wu@mediatek.com> <20210714025626.5528-7-yong.wu@mediatek.com> From: Dafna Hirschfeld Message-ID: <61aa5aa9-5bd2-e99c-02ef-f5d13526eb43@collabora.com> Date: Wed, 14 Jul 2021 10:44:01 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210714025626.5528-7-yong.wu@mediatek.com> Content-Language: en-US Cc: Xia Jiang , Chun-Kuang Hu , Will Deacon , dri-devel@lists.freedesktop.org, anthony.huang@mediatek.com, youlin.pei@mediatek.com, Nicolas Boichat , Evan Green , Eizan Miyamoto , Matthias Kaehlcke , Yongqiang Niu , CK Hu , linux-media@vger.kernel.org, devicetree@vger.kernel.org, Philipp Zabel , yi.kuo@mediatek.com, linux-mediatek@lists.infradead.org, Hsin-Yi Wang , ming-fan.chen@mediatek.com, Tiffany Lin , linux-arm-kernel@lists.infradead.org, anan.sun@mediatek.com, srv_heupstream@mediatek.com, acourbot@chromium.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Daniel Vetter , Robin Murphy X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On 14.07.21 04:56, Yong Wu wrote: > From: Yongqiang Niu > > Prepare for smi cleaning up "mediatek,larb". > > Display use the dispsys device to call pm_rumtime_get_sync before. > This patch add pm_runtime_xx with ovl and rdma device whose nodes has > "iommus" property, then display could help pm_runtime_get for smi via > ovl or rdma device. > > CC: CK Hu > Signed-off-by: Yongqiang Niu > Signed-off-by: Yong Wu > (Yong: Use pm_runtime_resume_and_get instead of pm_runtime_get_sync) > Acked-by: Chun-Kuang Hu > --- > drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 9 ++++++++- > drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 9 ++++++++- > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 12 +++++++++++- > 3 files changed, 27 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c > index fa9d79963cd3..ea5760f856ec 100644 > --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c > @@ -11,6 +11,7 @@ > #include > #include > #include > +#include > #include > > #include "mtk_disp_drv.h" > @@ -414,15 +415,21 @@ static int mtk_disp_ovl_probe(struct platform_device *pdev) > return ret; > } > > + pm_runtime_enable(dev); > + > ret = component_add(dev, &mtk_disp_ovl_component_ops); > - if (ret) > + if (ret) { > + pm_runtime_disable(dev); > dev_err(dev, "Failed to add component: %d\n", ret); > + } > > return ret; > } > > static int mtk_disp_ovl_remove(struct platform_device *pdev) > { > + pm_runtime_disable(&pdev->dev); > + > return 0; > } > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > index 705f28ceb4dd..0f31d1c8e37c 100644 > --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c > @@ -9,6 +9,7 @@ > #include > #include > #include > +#include > #include > > #include "mtk_disp_drv.h" > @@ -327,9 +328,13 @@ static int mtk_disp_rdma_probe(struct platform_device *pdev) > > platform_set_drvdata(pdev, priv); > > + pm_runtime_enable(dev); > + > ret = component_add(dev, &mtk_disp_rdma_component_ops); > - if (ret) > + if (ret) { > + pm_runtime_disable(dev); > dev_err(dev, "Failed to add component: %d\n", ret); > + } > > return ret; > } > @@ -338,6 +343,8 @@ static int mtk_disp_rdma_remove(struct platform_device *pdev) > { > component_del(&pdev->dev, &mtk_disp_rdma_component_ops); > > + pm_runtime_disable(&pdev->dev); > + > return 0; > } > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > index 474efb844249..08e3f352377d 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c > @@ -557,9 +557,15 @@ static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc, > return; > } > > + ret = pm_runtime_resume_and_get(comp->dev); > + if (ret < 0) > + DRM_DEV_ERROR(comp->dev, "Failed to enable power domain: %d\n", > + ret); shouldn't the code return in case of failure here? Thanks, Dafna > + > ret = mtk_crtc_ddp_hw_init(mtk_crtc); > if (ret) { > mtk_smi_larb_put(comp->larb_dev); > + pm_runtime_put(comp->dev); > return; > } > > @@ -572,7 +578,7 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc, > { > struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc); > struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0]; > - int i; > + int i, ret; > > DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id); > if (!mtk_crtc->enabled) > @@ -596,6 +602,10 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc, > drm_crtc_vblank_off(crtc); > mtk_crtc_ddp_hw_fini(mtk_crtc); > mtk_smi_larb_put(comp->larb_dev); > + ret = pm_runtime_put(comp->dev); > + if (ret < 0) > + DRM_DEV_ERROR(comp->dev, "Failed to disable power domain: %d\n", > + ret); > > mtk_crtc->enabled = false; > } > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu