linux-kernel - Re: [PATCH 7/9] ARM: multi_v7_defconfig: Enable options for Exynos display support

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Message-ID: <CAJKOXPfSZnrpv2g=T-UyYi-_cSN=g9DG4e8eKszY+a_rVknTqw@mail.gmail.com>
Date:	Fri, 15 May 2015 09:36:14 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	arm@...nel.org, Arnd Bergmann <arnd@...db.de>,
	Olof Johansson <olof@...om.net>,
	Kevin Hilman <khilman@...aro.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Doug Anderson <dianders@...omium.org>,
	Kukjin Kim <kgene@...nel.org>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/9] ARM: multi_v7_defconfig: Enable options for Exynos
 display support

2015-05-15 0:40 GMT+09:00 Javier Martinez Canillas
<javier.martinez@...labora.co.uk>:
> Many Exynos devices have devices attached to their display ports.
> This patch enables the needed Kconfig options to support different
> configuration such as simple panel, embedded DisplayPort (eDP) to
> LVDS bridges and HDMI displays.

Enabling the display would be nice but for some quite long time we had
issues with DRM on Exynos. exynos_defconfig has it enabled and most of
boards boot fine with it. Exception is Arndale 5250:
http://storage.kernelci.org/next/next-20150514/arm-exynos_defconfig/lab-khilman/boot-exynos5250-arndale.html
[    1.630290] [drm:exynos_dp_bind] *ERROR* failed: of_get_videomode() : -22
[    1.637071] exynos-drm exynos-drm: failed to bind
145b0000.dp-controller (ops exynos_dp_ops): -22
[    1.646504] exynos-drm exynos-drm: master bind failed: -22
[    1.651391] exynos-drm: probe of exynos-drm failed with error -22

Anyway it is not like I am against it... just wondering. On the other
hand enabling it could help in early detection of errors.

Best regards,
Krzysztof
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