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Date:   Sat, 30 Oct 2021 17:02:33 +0800
From:   "yunfei.dong@...iatek.com" <yunfei.dong@...iatek.com>
To:     Dafna Hirschfeld <dafna.hirschfeld@...labora.com>,
        Alexandre Courbot <acourbot@...omium.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        "Tzung-Bi Shih" <tzungbi@...omium.org>,
        Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tomasz Figa <tfiga@...gle.com>
CC:     Hsin-Yi Wang <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Irui Wang <irui.wang@...iatek.com>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Tzung-Bi Shih <tzungbi@...gle.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH v8, 03/17] media: mtk-vcodec: Refactor vcodec pm
 interface

Hi Dafna,

Thanks for your suggestion.
On Fri, 2021-10-29 at 13:35 +0200, Dafna Hirschfeld wrote:
> 
> On 29.10.21 05:55, Yunfei Dong wrote:
> > Using the needed param for pm init/release function and remove
> > unused
> > param mtkdev in 'struct mtk_vcodec_pm'.
> > 
> > Reviewed-by: Tzung-Bi Shih <tzungbi@...gle.com>
> > Reviewed-By: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@...labora.com>
> > Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> 
> Hi,
> I already commented on v7 that since the pm implementation for dec
> and enc is identical,
> you should better do the same refactor to enc and dec or better
> remove the code duplication.
> 
1: Can't refactor encoder and decoder to use the same interface,
first, decoder and encoder are different hardware, the interface will
have more and more differences for different complex scenarios. Second,
we are trying to separate video encoder and decoder for the hardware
having more and more differences.

2: We are trying to remove mtk_vcodec_dec_pw_on, may not fix it in this
patch series. For another colleague are doing it.
> Thanks,
> Dafna
> 
Thanks,
Yunfei Dong
> > ---
> >   .../platform/mtk-vcodec/mtk_vcodec_dec_drv.c  |  6 ++---
> >   .../platform/mtk-vcodec/mtk_vcodec_dec_pm.c   | 22 ++++++++----
> > -------
> >   .../platform/mtk-vcodec/mtk_vcodec_dec_pm.h   |  5 +++--
> >   .../platform/mtk-vcodec/mtk_vcodec_drv.h      |  1 -
> >   .../platform/mtk-vcodec/mtk_vcodec_enc_pm.c   |  1 -
> >   5 files changed, 15 insertions(+), 20 deletions(-)
> > 
> > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c 
> > b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
> > index 055d50e52720..3ac4c3935e4e 100644
> > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
> > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
> > @@ -249,7 +249,7 @@ static int mtk_vcodec_probe(struct
> > platform_device *pdev)
> >   	if (IS_ERR(dev->fw_handler))
> >   		return PTR_ERR(dev->fw_handler);
> >   
> > -	ret = mtk_vcodec_init_dec_pm(dev);
> > +	ret = mtk_vcodec_init_dec_pm(dev->plat_dev, &dev->pm);
> >   	if (ret < 0) {
> >   		dev_err(&pdev->dev, "Failed to get mt vcodec clock
> > source");
> >   		goto err_dec_pm;
> > @@ -378,7 +378,7 @@ static int mtk_vcodec_probe(struct
> > platform_device *pdev)
> >   err_dec_alloc:
> >   	v4l2_device_unregister(&dev->v4l2_dev);
> >   err_res:
> > -	mtk_vcodec_release_dec_pm(dev);
> > +	mtk_vcodec_release_dec_pm(&dev->pm);
> >   err_dec_pm:
> >   	mtk_vcodec_fw_release(dev->fw_handler);
> >   	return ret;
> > @@ -418,7 +418,7 @@ static int mtk_vcodec_dec_remove(struct
> > platform_device *pdev)
> >   		video_unregister_device(dev->vfd_dec);
> >   
> >   	v4l2_device_unregister(&dev->v4l2_dev);
> > -	mtk_vcodec_release_dec_pm(dev);
> > +	mtk_vcodec_release_dec_pm(&dev->pm);
> >   	mtk_vcodec_fw_release(dev->fw_handler);
> >   	return 0;
> >   }
> > 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..20bd157a855c 100644
> > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > @@ -13,18 +13,15 @@
> >   #include "mtk_vcodec_dec_pm.h"
> >   #include "mtk_vcodec_util.h"
> >   
> > -int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> > +int mtk_vcodec_init_dec_pm(struct platform_device *pdev,
> > +	struct mtk_vcodec_pm *pm)
> >   {
> >   	struct device_node *node;
> > -	struct platform_device *pdev;
> > -	struct mtk_vcodec_pm *pm;
> > +	struct platform_device *larb_pdev;
> >   	struct mtk_vcodec_clk *dec_clk;
> >   	struct mtk_vcodec_clk_info *clk_info;
> >   	int i = 0, ret = 0;
> >   
> > -	pdev = mtkdev->plat_dev;
> > -	pm = &mtkdev->pm;
> > -	pm->mtkdev = mtkdev;
> >   	dec_clk = &pm->vdec_clk;
> >   	node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
> >   	if (!node) {
> > @@ -32,13 +29,12 @@ int mtk_vcodec_init_dec_pm(struct
> > mtk_vcodec_dev *mtkdev)
> >   		return -1;
> >   	}
> >   
> > -	pdev = of_find_device_by_node(node);
> > +	larb_pdev = of_find_device_by_node(node);
> >   	of_node_put(node);
> > -	if (WARN_ON(!pdev)) {
> > +	if (WARN_ON(!larb_pdev)) {
> >   		return -1;
> >   	}
> > -	pm->larbvdec = &pdev->dev;
> > -	pdev = mtkdev->plat_dev;
> > +	pm->larbvdec = &larb_pdev->dev;
> >   	pm->dev = &pdev->dev;
> >   
> >   	dec_clk->clk_num =
> > @@ -82,10 +78,10 @@ int mtk_vcodec_init_dec_pm(struct
> > mtk_vcodec_dev *mtkdev)
> >   	return ret;
> >   }
> >   
> > -void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
> > +void mtk_vcodec_release_dec_pm(struct mtk_vcodec_pm *pm)
> >   {
> > -	pm_runtime_disable(dev->pm.dev);
> > -	put_device(dev->pm.larbvdec);
> > +	pm_runtime_disable(pm->dev);
> > +	put_device(pm->larbvdec);
> >   }
> >   
> >   int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
> > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h
> > b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h
> > index 280aeaefdb65..a3df6aef6cb9 100644
> > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h
> > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h
> > @@ -9,8 +9,9 @@
> >   
> >   #include "mtk_vcodec_drv.h"
> >   
> > -int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *dev);
> > -void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev);
> > +int mtk_vcodec_init_dec_pm(struct platform_device *pdev,
> > +	struct mtk_vcodec_pm *pm);
> > +void mtk_vcodec_release_dec_pm(struct mtk_vcodec_pm *pm);
> >   
> >   int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm);
> >   void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm);
> > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> > b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> > index 1d2370608d0d..0fa9d85114b9 100644
> > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> > @@ -195,7 +195,6 @@ struct mtk_vcodec_pm {
> >   	struct mtk_vcodec_clk	venc_clk;
> >   	struct device	*larbvenc;
> >   	struct device	*dev;
> > -	struct mtk_vcodec_dev	*mtkdev;
> >   };
> >   
> >   /**
> > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
> > b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
> > index 1b2e4930ed27..0c8c8f86788c 100644
> > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
> > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
> > @@ -26,7 +26,6 @@ int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev
> > *mtkdev)
> >   	pdev = mtkdev->plat_dev;
> >   	pm = &mtkdev->pm;
> >   	memset(pm, 0, sizeof(struct mtk_vcodec_pm));
> > -	pm->mtkdev = mtkdev;
> >   	pm->dev = &pdev->dev;
> >   	dev = &pdev->dev;
> >   	enc_clk = &pm->venc_clk;
> > 

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