linux-kernel - Re: [PATCH] [media] v4l: omap4iss: Remove VIDEO_OMAP4

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Message-ID: <1392045231.3585.33.camel@x220>
Date:	Mon, 10 Feb 2014 16:13:51 +0100
From:	Paul Bolle <pebolle@...cali.nl>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [media] v4l: omap4iss: Remove VIDEO_OMAP4_DEBUG

Laurent,

On Mon, 2014-02-10 at 15:13 +0100, Laurent Pinchart wrote:
> On Sunday 09 February 2014 16:09:37 Paul Bolle wrote:
> > Commit d632dfefd36f ("[media] v4l: omap4iss: Add support for OMAP4
> > camera interface - Build system") added a Kconfig entry for
> > VIDEO_OMAP4_DEBUG. But nothing uses that symbol.
> > 
> > This entry was apparently copied from a similar entry for "OMAP 3
> > Camera debug messages". But a corresponding Makefile line is missing.
> > Besides, the debug code also depends on a mysterious ISS_ISR_DEBUG
> > macro. This Kconfig entry can be removed.
> 
> What about adding the associated Makefile line instead to #define DEBUG when 
> VIDEO_OMAP4_DEBUG is selected, as with the OMAP3 ISP driver ?
>  
> > Someone familiar with the code might be able to say what to do with the
> > code depending on the DEBUG and ISS_ISR_DEBUG macros.
> 
> ISS_ISR_DEBUG is expected to be set by manually modifying the source code, as 
> it prints lots of messages in interrupt context.

Which renders the DEBUG macro pointless. Or does the code use some
dev_dbg()-like magic, which is only triggered if the DEBUG macro is set?

Thanks,


Paul Bolle

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