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

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Message-ID: <7h4mx37tc6.fsf@paris.lan>
Date:	Fri, 22 Aug 2014 20:55:37 -0700
From:	Kevin Hilman <khilman@...aro.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Kukjin Kim <kgene.kim@...sung.com>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>, afaerber@...e.de,
	Ajay Kumar <ajaykumar.rs@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] ARM: exynos_defconfig: Enable options for display panel support

Javier Martinez Canillas <javier.martinez@...labora.co.uk> writes:

> 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 display bridge.
>
> This patch enables the following features to support 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 and LCD device support
>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> ---
>
> Some of the options enabled here (e.g: the eDP/LVDS bridges)
> are still not merged in mainline so this patch depends on
> the following posted patches that were still not merged:
>
> "drm/bridge: Modify drm_bridge core to support driver model" [0]
> "drm/bridge: Add i2c based driver for ptn3460 bridge" [1]
> "drm/bridge: Add i2c based driver for ps8622/ps8625 bridge" [2]
>
> But I wanted to post anyways to make easier for others to
> figure out what are the needed options to have the display
> working on their Exynos machines.

Great, thanks for this!  I spent/wasted quite a bit of time trying to
figure out which options I needed to enable to get basic display support
working.
>
> In order to test the display panel on the Peach machines,
> the following patches are also needed:
>
> "ARM: dts: Add DT changes for display on peach_pit" [3]
> "ARM: dts: Add DT changes for display on peach_pi" [4]

Tested-by: Kevin Hilman <khilman@...aro.org>

On v3.17-rc1 along with these DT patches abvoe on exynos5800/chromebook2
(peach-pi).

Thanks,

Kevin
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