linux-kernel - Re: [PATCH v7 4/5] media: platform: mediatek: isp: add mediatek ISP3.0 camsv

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Message-ID: <20241124061159.GD19381@pendragon.ideasonboard.com>
Date: Sun, 24 Nov 2024 08:11:59 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: CK Hu (胡俊光) <ck.hu@...iatek.com>
Cc: Julien Stephan <jstephan@...libre.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"paul.elder@...asonboard.com" <paul.elder@...asonboard.com>,
	"mchehab@...nel.org" <mchehab@...nel.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>,
	"robh@...nel.org" <robh@...nel.org>,
	Andy Hsieh (謝智皓) <Andy.Hsieh@...iatek.com>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"matthias.bgg@...il.com" <matthias.bgg@...il.com>,
	"krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	"fsylvestre@...libre.com" <fsylvestre@...libre.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"pnguyen@...libre.com" <pnguyen@...libre.com>
Subject: Re: [PATCH v7 4/5] media: platform: mediatek: isp: add mediatek
 ISP3.0 camsv

On Fri, Nov 22, 2024 at 09:28:53AM +0000, CK Hu (胡俊光) wrote:
> On Fri, 2024-11-22 at 10:16 +0100, Julien Stephan wrote:
> > Le ven. 22 nov. 2024 à 08:54, CK Hu (胡俊光) a écrit :
> > > On Thu, 2024-11-21 at 09:53 +0100, Julien Stephan wrote:
> > > > External email : Please do not click links or open attachments until you have verified the sender or the content.
> > > >
> > > >
> > > > From: Phi-bang Nguyen <pnguyen@...libre.com>
> > > >
> > > > This driver provides a path to bypass the SoC ISP so that image data
> > > > coming from the SENINF can go directly into memory without any image
> > > > processing. This allows the use of an external ISP.
> > > >
> > > > Signed-off-by: Phi-bang Nguyen <pnguyen@...libre.com>
> > > > Signed-off-by: Florian Sylvestre <fsylvestre@...libre.com>
> > > > [Paul Elder fix irq locking]
> > > > Signed-off-by: Paul Elder <paul.elder@...asonboard.com>
> > > > Co-developed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > > > Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > > > Co-developed-by: Julien Stephan <jstephan@...libre.com>
> > > > Signed-off-by: Julien Stephan <jstephan@...libre.com>
> > > > ---
> > >
> > > [snip]
> > >
> > > > +static void mtk_cam_cmos_vf_enable(struct mtk_cam_dev *cam_dev,
> > > > +                                  bool enable, bool pak_en)
> > > > +{
> > > > +       if (enable)
> > > > +               cam_dev->hw_functions->mtk_cam_cmos_vf_hw_enable(cam_dev);
> > >
> > > Directly call mtk_camsv30_cmos_vf_hw_enable().
> > > This has discussed in previous version [1].
> > >
> > > [1] https://patchwork.kernel.org/project/linux-mediatek/patch/20240729-add-mtk-isp-3-0-support-v6-4-c374c9e0c672@baylibre.com/
> >
> > Hi CK,
> >
> > I forgot about that discussion sorry :/
> > I guess you want me to completely remove the  mtk_cam_hw_functions struct?
> > In that case, what do you prefer:
> > - keep mtk_camsv30_hw.c and put signatures in mtkcamsv30_hw.h and
> > include mtk_camsv30_hw.h in mtk_camsv_video.c
> > - rename mtk_camsv30_hw.c to mtk_camsv_hw.c (and all functions) and
> > put signatures in mtk_camsv_hw.h
> 
> I prefer the second one.

If we drop the indirection (which I think is a good idea until we get a
second hardware generation supported by the same driver) I would also go
for the latter.

> > > > +       else
> > > > +               cam_dev->hw_functions->mtk_cam_cmos_vf_hw_disable(cam_dev);
> > > > +}
> > > > +
> > > >

-- 
Regards,

Laurent Pinchart