linux-kernel - Re: [PATCH v2 1/1] ARM: exynos_defconfig: Enable options for display panel support

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Date:	Sat, 1 Nov 2014 00:42:11 +0100
From:	Javier Martinez Canillas <javier@...hile0.org>
To:	Kukjin Kim <kgene.kim@...sung.com>
Cc:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Kevin Hilman <khilman@...aro.org>,
	Andreas Färber <afaerber@...e.de>,
	Ajay Kumar <ajaykumar.rs@...sung.com>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/1] ARM: exynos_defconfig: Enable options for display
 panel support

Hello Kukjin,

On Mon, Aug 25, 2014 at 10:45 AM, Javier Martinez Canillas
<javier.martinez@...labora.co.uk> wrote:
> Many Exynos devices have a display panel. Most of them just have
> a simple panel while others have more complex configurations that
> requires an embedded DisplayPort (eDP) to LVDS bridges.
>
> This patch enables the following features to be built in the kernel
> image to suport both setups:
>
> - Direct Rendering Manager (DRM)
> - DRM bridge registration and lookup framework
> - Parade ps8622/ps8625 eDP/LVDS bridge
> - NXP ptn3460 eDP/LVDS bridge
> - Exynos Fully Interactive Mobile Display controller (FIMD)
> - Panel registration and lookup framework
> - Simple panels
> - Backlight & LCD device support
>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> Tested-by: Kevin Hilman <khilman@...aro.org>
> ---

This patch is needed to have display working on many Exynos boards.

$subject enables the config option for the ps8622/ps8625 eDP/LVDS
bridge driver but this has not landed in mainline yet. Ajay will
re-spin a new revision of his series that adds this driver though,
after addressing some issues pointed out on a previous version.

The Kconfig symbol name (DRM_PS8622) won't change though so maybe is
not crazy to pick the patch as is since CONFIG_DRM_PS8622 will have to
be enabled later when the bridge driver lands. Or do you want me to
re-spin $subject removing that option?

Best regards,
Javier
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