linux-kernel - Re: [PATCH 4/5] media: staging: Drop bcm2835-camera driver

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Message-ID: <CAPY8ntDz9duSU_TcqE5CPYYCmSTnvm=RgwG56qQ0xe07uzWFLA@mail.gmail.com>
Date: Mon, 1 Sep 2025 11:59:22 +0100
From: Dave Stevenson <dave.stevenson@...pberrypi.com>
To: Stefan Wahren <wahrenst@....net>
Cc: Jai Luthra <jai.luthra@...asonboard.com>, 
	Florian Fainelli <florian.fainelli@...adcom.com>, 
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Ray Jui <rjui@...adcom.com>, 
	Scott Branden <sbranden@...adcom.com>, linux-rpi-kernel@...ts.infradead.org, 
	linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, kernel-list@...pberrypi.com, 
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH 4/5] media: staging: Drop bcm2835-camera driver

Hi Stefan

On Wed, 27 Aug 2025 at 20:18, Stefan Wahren <wahrenst@....net> wrote:
>
> Hi Jai,
>
> Am 27.08.25 um 08:24 schrieb Jai Luthra:
> > The bcm2835-camera driver is replaced by the V4L2 bcm2835-unicam driver
> > that is already upstream. So drop it from staging.
> AFAIK the old Raspberry Pi Camera V1 isn't supported by V4L2
> bcm2835-unicam.

The Pi v1 camera is Omnivision's OV5647.
There is a driver in drivers/media/i2c/ov5647.c, and that is supported
on the Pi via libcamera.

It does look like we have a number of downstream patches to that
driver that I ought to upstream - always something to do.

  Dave

> Personally i'm fine with this, but this must be clear in
> the commit message.Did you already talked to distributions like Redhat &
> OpenSuSE about this step?
> > This also simplifies destaging of VCHIQ MMAL, by reducing the users of
> > the MMAL API (this driver is one of them).
> AFAIU this drops the only one user of VCHIQ MMAL. So please explain, why
> we still need this API and how this should be tested?
>
> Best regards