linux-kernel - Re: [PATCH v2 00/20] Reorganize media Kconfig

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Date:   Tue, 24 Mar 2020 15:02:58 +0100
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Stefan Richter <stefanr@...6.in-berlin.de>,
        linux1394-devel@...ts.sourceforge.net,
        Helen Koike <helen.koike@...labora.com>
Subject: Re: [PATCH v2 00/20] Reorganize media Kconfig

Em Tue, 24 Mar 2020 15:53:59 +0200
Laurent Pinchart <laurent.pinchart@...asonboard.com> escreveu:

> Hi Mauro,
> 
> Thank you for the patches.
> 
> On Tue, Mar 24, 2020 at 02:42:53PM +0100, Mauro Carvalho Chehab wrote:
> > This patch series do lots of reorg at the media Kconfig options.
> > It also move test drivers from platform dir to a new one.
> > 
> > After this change, the main config is organized on menus, allowing to
> > select:
> > 
> > 	- type of devices selection - the filtering options
> > 	- Media core options - with API and other core stuff
> > 	- Media core extra options
> > 	- Media drivers
> > 	- Media ancillary drivers
> > 
> > The "type of devices" menu has the filtering options for:
> > 
> > 	- Cameras and video grabbers
> > 	- Analog TV
> > 	- Digital TV
> > 	- AM/FM radio receivers/transmitters
> > 	- SDR
> > 	- CEC
> > 	- Embeded devices (SoC)
> > 	- Test drivers
> > 
> > This way, one interested only on embedded devices can unselect
> > everything but "Embedded devices (SoC)" option.
> > 
> > Distros for PC/Laptops can enable everything but 
> > "Embedded devices (SoC)" and "Test drivers".
> 
> How about a device such as the Intel IPU3 ? It's a SoC, and is present
> in laptops. Unlike the physical interface which is a fairly well defined
> way to categorize devices, creating artificial classes will always leave
> some devices without a home. We could have a capture card that supports
> both analog and digital TV. A digital TV capture card with an HDMI input
> can have a CEC device. Lots of combinations are possible.

This is basically what we had before, just better organized. 

It is a hints based selection. So, a multi-function device like IPU3
would basically do (either directly or the menu which contains it):

	depends on MEDIA_EMBEDDED_SUPPORT || MEDIA_CAMERA_SUPPORT

When the filter is disabled, both options tune to "y".


Thanks,
Mauro