linux-kernel - Re: [PATCH v2] drm/panel: simple: Add support for Innolux AT070TN92

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Date:	Sat, 23 Apr 2016 00:30:49 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Holger Schurig <holgerschurig@...il.com>
Cc:	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Riccardo Bortolato <bortolato@...altechitalia.it>,
	David Airlie <airlied@...ux.ie>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Daniel Vetter <daniel@...ll.ch>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] drm/panel: simple: Add support for Innolux AT070TN92

On Thu, Apr 21, 2016 at 02:11:19PM +0200, Holger Schurig wrote:
> Thierry Reding <thierry.reding@...il.com> writes:
> > Applied, thanks.
> 
> I once read that this is the recommended way to go, instead of
> specifying the timings in the device tree. Why is this so?  Any new
> display just increases the .text size of the kernel unnessary.

It's actually only the .rodata section that's increased every time we
add a new display panel.

> Did this idea stem from the era where bootloaders like Barebox couldn't
> modify the DT ad-hoc before handing it over to the kernel?

No, not really. But since this has come up every now and again I finally
wrote down my recollection and thoughts on the matter, hopefully that
will be satisfactory as an answer:

	http://sietch-tagr.blogspot.com/2016/04/display-panels-are-not-special.html

Thierry

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