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From: Yong Wu <yong.wu@mediatek.com>
To: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Joerg Roedel <joro@8bytes.org>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	David Airlie <airlied@linux.ie>,
	"Mauro Carvalho Chehab" <mchehab@kernel.org>
Cc: Evan Green <evgreen@chromium.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Tomasz Figa <tfiga@chromium.org>,
	Will Deacon <will.deacon@arm.com>,
	<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>, <youlin.pei@mediatek.com>,
	Matthias Kaehlcke <mka@chromium.org>, <anan.sun@mediatek.com>,
	<yi.kuo@mediatek.com>, <acourbot@chromium.org>,
	<linux-media@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	"Philipp Zabel" <p.zabel@pengutronix.de>,
	Tiffany Lin <tiffany.lin@mediatek.com>,
	Hsin-Yi Wang <hsinyi@chromium.org>,
	Eizan Miyamoto <eizan@chromium.org>, <anthony.huang@mediatek.com>,
	Frank Wunderlich <frank-w@public-files.de>,
	Irui Wang <irui.wang@mediatek.com>
Subject: Re: [PATCH v8 09/12] media: mtk-vcodec: Get rid of mtk_smi_larb_get/put
Date: Thu, 30 Sep 2021 11:28:12 +0800	[thread overview]
Message-ID: <79cbf64491273797f218f417234b8c95936bd3b1.camel@mediatek.com> (raw)
In-Reply-To: <02f444d5-9633-3f9c-2d1f-97ce073d1180@collabora.com>

Hi Dafna,

Thanks very much for the review.

On Wed, 2021-09-29 at 14:13 +0200, Dafna Hirschfeld wrote:
> 
> On 29.09.21 03:37, Yong Wu wrote:
> > MediaTek IOMMU has already added the device_link between the
> > consumer
> > and smi-larb device. If the vcodec device call the
> > pm_runtime_get_sync,
> > the smi-larb's pm_runtime_get_sync also be called automatically.
> > 
> > CC: Tiffany Lin <tiffany.lin@mediatek.com>
> > CC: Irui Wang <irui.wang@mediatek.com>
> > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> > Reviewed-by: Evan Green <evgreen@chromium.org>
> > Acked-by: Tiffany Lin <tiffany.lin@mediatek.com>
> > Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
> > ---
> >   .../platform/mtk-vcodec/mtk_vcodec_dec_pm.c   | 37 +++-----------
> > --
> >   .../platform/mtk-vcodec/mtk_vcodec_drv.h      |  3 --
> >   .../platform/mtk-vcodec/mtk_vcodec_enc.c      |  1 -
> >   .../platform/mtk-vcodec/mtk_vcodec_enc_pm.c   | 44 +++-----------
> > -----
> >   4 files changed, 10 insertions(+), 75 deletions(-)
> > 
> > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > index 6038db96f71c..d0bf9aa3b29d 100644
> > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > @@ -8,14 +8,12 @@
> >   #include <linux/of_address.h>
> >   #include <linux/of_platform.h>
> >   #include <linux/pm_runtime.h>
> > -#include <soc/mediatek/smi.h>
> >   
> >   #include "mtk_vcodec_dec_pm.h"
> >   #include "mtk_vcodec_util.h"
> >   
> >   int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> >   {
> > -	struct device_node *node;
> >   	struct platform_device *pdev;
> >   	struct mtk_vcodec_pm *pm;
> >   	struct mtk_vcodec_clk *dec_clk;
> > @@ -26,18 +24,7 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev
> > *mtkdev)
> >   	pm = &mtkdev->pm;
> >   	pm->mtkdev = mtkdev;
> >   	dec_clk = &pm->vdec_clk;
> > -	node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
> > -	if (!node) {
> > -		mtk_v4l2_err("of_parse_phandle mediatek,larb fail!");
> > -		return -1;
> > -	}
> >   
> > -	pdev = of_find_device_by_node(node);
> > -	of_node_put(node);
> > -	if (WARN_ON(!pdev)) {
> > -		return -1;
> > -	}
> > -	pm->larbvdec = &pdev->dev;
> >   	pdev = mtkdev->plat_dev;
> >   	pm->dev = &pdev->dev;
> >   
> > @@ -47,14 +34,11 @@ int mtk_vcodec_init_dec_pm(struct
> > mtk_vcodec_dev *mtkdev)
> >   		dec_clk->clk_info = devm_kcalloc(&pdev->dev,
> >   			dec_clk->clk_num, sizeof(*clk_info),
> >   			GFP_KERNEL);
> > -		if (!dec_clk->clk_info) {
> > -			ret = -ENOMEM;
> > -			goto put_device;
> > -		}
> > +		if (!dec_clk->clk_info)
> > +			return -ENOMEM;
> >   	} else {
> >   		mtk_v4l2_err("Failed to get vdec clock count");
> > -		ret = -EINVAL;
> > -		goto put_device;
> > +		return -EINVAL;
> >   	}
> >   
> >   	for (i = 0; i < dec_clk->clk_num; i++) {
> > @@ -63,29 +47,24 @@ int mtk_vcodec_init_dec_pm(struct
> > mtk_vcodec_dev *mtkdev)
> >   			"clock-names", i, &clk_info->clk_name);
> >   		if (ret) {
> >   			mtk_v4l2_err("Failed to get clock name id =
> > %d", i);
> > -			goto put_device;
> > +			return ret;
> >   		}
> >   		clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
> >   			clk_info->clk_name);
> >   		if (IS_ERR(clk_info->vcodec_clk)) {
> >   			mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
> >   				clk_info->clk_name);
> > -			ret = PTR_ERR(clk_info->vcodec_clk);
> > -			goto put_device;
> > +			return PTR_ERR(clk_info->vcodec_clk);
> >   		}
> >   	}
> >   
> >   	pm_runtime_enable(&pdev->dev);
> >   	return 0;
> > -put_device:
> > -	put_device(pm->larbvdec);
> > -	return ret;
> >   }
> >   
> >   void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
> >   {
> >   	pm_runtime_disable(dev->pm.dev);
> > -	put_device(dev->pm.larbvdec);
> >   }
> 
> Now that functions only do  'pm_runtime_disable(dev->pm.dev);' so it
> will be more
> readable to remove the function mtk_vcodec_release_dec_pm
> and replace with pm_runtime_disable(dev->pm.dev);
> Same for the 'enc' equivalent.

Make sense. But It may be not proper if using pm_runtime_disable
as the symmetry with mtk_vcodec_init_dec_pm in the mtk_vcodec_probe.

Maybe we should move pm_runtime_enable out from mtk_vcodec_init_dec_pm
into mtk_vcodec_probe. I could do a new patch for this. Is this ok for
you?

> 
> Thanks,
> Dafna

[snip]

  reply	other threads:[~2021-09-30  3:28 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-29  1:37 [PATCH v8 00/12] Clean up "mediatek,larb" Yong Wu
2021-09-29  1:37 ` [PATCH v8 01/12] dt-binding: mediatek: Get rid of mediatek, larb for multimedia HW Yong Wu
2021-09-29  1:37 ` [PATCH v8 02/12] iommu/mediatek-v1: Free the existed fwspec if the master dev already has Yong Wu
2021-09-29  1:37 ` [PATCH v8 03/12] iommu/mediatek: Add probe_defer for smi-larb Yong Wu
2021-09-29 16:33   ` Dafna Hirschfeld
2021-09-30  7:14     ` Yong Wu
2021-09-29  1:37 ` [PATCH v8 04/12] iommu/mediatek: Add device_link between the consumer and the larb devices Yong Wu
2021-10-11 12:36   ` Dafna Hirschfeld
2021-10-16  2:23     ` Yong Wu
2021-10-18  7:13       ` Dafna Hirschfeld
2021-10-25  3:57         ` Yong Wu
2021-09-29  1:37 ` [PATCH v8 05/12] media: mtk-jpeg: Get rid of mtk_smi_larb_get/put Yong Wu
2021-09-29  1:37 ` [PATCH v8 06/12] media: mtk-mdp: " Yong Wu
2021-09-29  1:37 ` [PATCH v8 07/12] drm/mediatek: Add pm runtime support for ovl and rdma Yong Wu
2021-09-29  1:37 ` [PATCH v8 08/12] drm/mediatek: Get rid of mtk_smi_larb_get/put Yong Wu
2021-09-29  1:37 ` [PATCH v8 09/12] media: mtk-vcodec: " Yong Wu
2021-09-29 12:13   ` Dafna Hirschfeld
2021-09-30  3:28     ` Yong Wu [this message]
2021-09-30 10:57       ` Dafna Hirschfeld
2021-10-07  2:57         ` Yong Wu
2021-09-29  1:37 ` [PATCH v8 10/12] memory: mtk-smi: " Yong Wu
2021-09-29  1:37 ` [PATCH v8 11/12] arm: dts: mediatek: Get rid of mediatek,larb for MM nodes Yong Wu
2021-09-29  1:37 ` [PATCH v8 12/12] arm64: " Yong Wu

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