linux-kernel - Re: [PATCH v8 12/18] media: cadence: csi2rx: add multistream support

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Message-ID: <aVJijbfKT1uT0ejG@kekkonen.localdomain>
Date: Mon, 29 Dec 2025 13:14:21 +0200
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: Rishikesh Donadkar <r-donadkar@...com>
Cc: jai.luthra@...ux.dev, laurent.pinchart@...asonboard.com,
	mripard@...nel.org, y-abhilashchandra@...com, devarsht@...com,
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	conor+dt@...nel.org, hverkuil-cisco@...all.nl,
	tomi.valkeinen@...asonboard.com, jai.luthra@...asonboard.com,
	changhuang.liang@...rfivetech.com, jack.zhu@...rfivetech.com,
	sjoerd@...labora.com, dan.carpenter@...aro.org,
	hverkuil+cisco@...nel.org, linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v8 12/18] media: cadence: csi2rx: add multistream support

Hi Rishikesh,

On Tue, Dec 09, 2025 at 03:13:34PM +0530, Rishikesh Donadkar wrote:
> > > @@ -538,6 +595,36 @@ static int csi2rx_disable_streams(struct v4l2_subdev *subdev,
> > >   	return 0;
> > >   }
> > > +static int csi2rx_s_stream_fallback(struct v4l2_subdev *sd, int enable)
> > What do you need this for? I presume you'd have a sub-device driver
> > downstream calling this, but wouldn't you always use {en,dis}able_streams
> > from that driver?
> 
> 
> Yes, Downstream consumer driver that call this are TI Shim and StarFive
> JH7110 CAMSS. TI Shim uses {en,dis}able_streams, the StarFive JH7110 CAMSS
> calls the s_stream. I will change the StarFive JH7110 CAMSS to use
> {en,dis}able_streams.

Thanks!

-- 
Sakari Ailus