linux-kernel - Re: [PATCH v2 1/1] lib/vsprintf: Add support for printing V4L2 and DRM fourccs

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Message-ID: <CAHp75Vdp+PXaJxrm99DgpJSS+6PcD1FfAfE3U1auFr2oxk5-tA@mail.gmail.com>
Date:   Mon, 6 Apr 2020 13:44:30 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     Joe Perches <joe@...ches.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Petr Mladek <pmladek@...e.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>
Subject: Re: [PATCH v2 1/1] lib/vsprintf: Add support for printing V4L2 and
 DRM fourccs

On Mon, Apr 6, 2020 at 10:46 AM Mauro Carvalho Chehab
<mchehab+huawei@...nel.org> wrote:
> Em Fri, 3 Apr 2020 21:32:42 +0300
> Andy Shevchenko <andy.shevchenko@...il.com> escreveu:
> > On Fri, Apr 3, 2020 at 8:54 PM Joe Perches <joe@...ches.com> wrote:
> > > On Fri, 2020-04-03 at 19:32 +0200, Mauro Carvalho Chehab wrote:
> > > > Em Fri, 03 Apr 2020 09:56:42 -0700
> > > > Joe Perches <joe@...ches.com> escreveu:
> >
> > > It _might_ be useful to use a CONFIG_MEDIA_SUPPORT guard
> > > in lib/vsprintf for this.
> >
> > No need. FourCC, if Sakari makes it more generic, can be used for
> > other purposes, e.g. printing component names from the chips (not
> > related to media at all).
> >
>
> Hmm... not 100% sure about what you're meaning with "component names".

4cc is pretty much wide standard, media is just one of (famous) users of it.

As I emphasized the example I referring to has nothing to do with media.

Now, I have already two examples:
- component name inside hardware register (used by Synopsys DesignWare)
- CSRT table in ACPI uses this code for vendor ID.

-- 
With Best Regards,
Andy Shevchenko