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Date:   Sat, 30 Oct 2021 16:50:03 +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>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Collabora Kernel ML <kernel@...labora.com>
Subject: Re: [PATCH v8, 04/17] media: mtk-vcodec: Build decoder pm file as
 module

Hi Danfa,

Thanks for your feedback.
On Fri, 2021-10-29 at 13:42 +0200, Dafna Hirschfeld wrote:
> 
> On 29.10.21 05:55, Yunfei Dong wrote:
> > Need to build decoder pm file as module for master and comp
> > use the same pm interface.
> 
> Do you still use the component framework in this patchset?
> In the cover letter you write: "- Use of_platform_populate to manage
> multi hardware, not component framework for patch 4/15"
> If that frameworks is not used anymore you should also change the
> commit log, and maybe this patch is not needed anymore?
> 
Not use component framework.

For iommu limit, not only parent device, the child device also need to
register as platform device. So the child device need to call
module_platform_driver. The child and parent device all need to call pm
interface to open/close pm/clk/irq. So build pm file as module, and
export necessary function.
> > 

Thanks
Yunfei Dong
> Thanks,
> Dafna
> > Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> > ---
> > v8: add new patch to build pm file as module
> > ---
> >   drivers/media/platform/mtk-vcodec/Makefile            | 6 ++++--
> >   drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c | 9
> > +++++++++
> >   2 files changed, 13 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/media/platform/mtk-vcodec/Makefile
> > b/drivers/media/platform/mtk-vcodec/Makefile
> > index ca8e9e7a9c4e..5d36e05535d7 100644
> > --- a/drivers/media/platform/mtk-vcodec/Makefile
> > +++ b/drivers/media/platform/mtk-vcodec/Makefile
> > @@ -2,7 +2,8 @@
> >   
> >   obj-$(CONFIG_VIDEO_MEDIATEK_VCODEC) += mtk-vcodec-dec.o \
> >   				       mtk-vcodec-enc.o \
> > -				       mtk-vcodec-common.o
> > +				       mtk-vcodec-common.o \
> > +				       mtk-vcodec-dec-common.o
> >   
> >   mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
> >   		vdec/vdec_vp8_if.o \
> > @@ -14,7 +15,8 @@ mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
> >   		mtk_vcodec_dec.o \
> >   		mtk_vcodec_dec_stateful.o \
> >   		mtk_vcodec_dec_stateless.o \
> > -		mtk_vcodec_dec_pm.o \
> > +
> > +mtk-vcodec-dec-common-y := mtk_vcodec_dec_pm.o
> >   
> >   mtk-vcodec-enc-y := venc/venc_vp8_if.o \
> >   		venc/venc_h264_if.o \
> > 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 20bd157a855c..09a281e3065a 100644
> > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> > @@ -77,12 +77,14 @@ int mtk_vcodec_init_dec_pm(struct
> > platform_device *pdev,
> >   	put_device(pm->larbvdec);
> >   	return ret;
> >   }
> > +EXPORT_SYMBOL_GPL(mtk_vcodec_init_dec_pm);
> >   
> >   void mtk_vcodec_release_dec_pm(struct mtk_vcodec_pm *pm)
> >   {
> >   	pm_runtime_disable(pm->dev);
> >   	put_device(pm->larbvdec);
> >   }
> > +EXPORT_SYMBOL_GPL(mtk_vcodec_release_dec_pm);
> >   
> >   int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
> >   {
> > @@ -94,6 +96,7 @@ int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm
> > *pm)
> >   
> >   	return ret;
> >   }
> > +EXPORT_SYMBOL_GPL(mtk_vcodec_dec_pw_on);
> >   
> >   void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
> >   {
> > @@ -103,6 +106,7 @@ void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm
> > *pm)
> >   	if (ret)
> >   		mtk_v4l2_err("pm_runtime_put_sync fail %d", ret);
> >   }
> > +EXPORT_SYMBOL_GPL(mtk_vcodec_dec_pw_off);
> >   
> >   void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
> >   {
> > @@ -129,6 +133,7 @@ void mtk_vcodec_dec_clock_on(struct
> > mtk_vcodec_pm *pm)
> >   	for (i -= 1; i >= 0; i--)
> >   		clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
> >   }
> > +EXPORT_SYMBOL_GPL(mtk_vcodec_dec_clock_on);
> >   
> >   void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
> >   {
> > @@ -139,3 +144,7 @@ void mtk_vcodec_dec_clock_off(struct
> > mtk_vcodec_pm *pm)
> >   	for (i = dec_clk->clk_num - 1; i >= 0; i--)
> >   		clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
> >   }
> > +EXPORT_SYMBOL_GPL(mtk_vcodec_dec_clock_off);
> > +
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_DESCRIPTION("Mediatek video decoder driver");
> > 

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