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Date:	Mon, 05 Jan 2015 21:57:41 +0900
From:	Kukjin Kim <kgene@...nel.org>
To:	'Javier Martinez Canillas' <javier.martinez@...labora.co.uk>
Cc:	'Doug Anderson' <dianders@...omium.org>,
	'Kevin Hilman' <khilman@...aro.org>,
	'Olof Johansson' <olof@...om.net>,
	linux-samsung-soc@...r.kernel.org,
	'Vivek Gautam' <gautam.vivek@...sung.com>,
	'Krzysztof Kozlowski' <k.kozlowski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: RE: [PATCH RESEND] ARM: exynos_defconfig: Enable options for display
 panel support

Javier Martinez Canillas 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 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 & LCD device support
> 
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> Tested-by: Kevin Hilman <khilman@...aro.org>
> Signed-off-by: Kukjin Kim <kgene.kim@...sung.com>
> ---
> 
> Hello Kukjin,
> 
Hi Javier,

Happy new year :)

> You dropped this patch since exynos drm was causing boot hangs on some
> platforms but the fix for that issue is already in linux-next (commit:
> f1e9203 clk: samsung: Fix Exynos 5420 pinctrl setup and clock disable
> failure due to domain being gated) so I think it makes sense to enable
> the display options again.
> 
> NOTE: Display panel is still not working since patch "arm: dts: Exynos5:
> Use pmu_system_controller phandle for dp phy" is needed [0] but I think
> we should enable display options to catch the regressions easier.
> 
Agreed with your suggestion and I'll pick this up into Samsung tree soon.

Thanks,
Kukjin

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