From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751451AbbIKFCD (ORCPT ); Fri, 11 Sep 2015 01:02:03 -0400 Received: from mailout2.w1.samsung.com ([210.118.77.12]:10031 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751064AbbIKFCA (ORCPT ); Fri, 11 Sep 2015 01:02:00 -0400 X-AuditID: cbfec7f5-f794b6d000001495-a0-55f26045e908 Subject: Re: [PATCH] ARM: exynos_defconfig: Disable simplefb support To: Javier Martinez Canillas , linux-kernel@vger.kernel.org References: <1441892552-13819-1-git-send-email-javier@osg.samsung.com> Cc: Michael Turquette , Kukjin Kim , Thierry Reding , Anand Moon , Russell King , linux-samsung-soc@vger.kernel.org, Lukasz Majewski , linux-arm-kernel@lists.infradead.org From: Krzysztof Kozlowski X-Enigmail-Draft-Status: N1110 Message-id: <55F26042.2080600@samsung.com> Date: Fri, 11 Sep 2015 14:01:54 +0900 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-version: 1.0 In-reply-to: <1441892552-13819-1-git-send-email-javier@osg.samsung.com> Content-type: text/plain; charset=windows-1252 Content-transfer-encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupgkeLIzCtJLcpLzFFi42I5/e/4ZV3XhE+hBpOXqVi8ebuGyeL1C0OL /sevmS3ePNzMaLHp8TVWi8u75rBZzDi/j8li3cZb7Ba3L/NaXDzlanH7N58Dt0dLcw+bx/sb reweO2fdZffYtKqTzWPzknqP3uZ3bB5b+oFCfVtWMXp83iQXwBnFZZOSmpNZllqkb5fAlfFr 7mOmgqVcFV/XzWVrYFzL0cXIySEhYCJxfeNXdghbTOLCvfVsXYxcHEICSxklDvVthHK+MEps bbgIVMXBISzgIrF2igZIg4hAqMS/i7cZQWwhATeJE28fsYLUMwtsZ5L4dfobE0iCTcBYYvPy JWwQG+QkersnsYDM4RXQkjj0yBckzCKgKnHlWA/YEaICERKnzr4FK+cVEJT4MfkeC4jNKeAu cWzJJbATmAX0JO5f1AIJMwvIS2xe85Z5AqPgLCQdsxCqZiGpWsDIvIpRNLU0uaA4KT3XSK84 Mbe4NC9dLzk/dxMjJH6+7mBceszqEKMAB6MSD6+F6qdQIdbEsuLK3EOMEhzMSiK8BnJAId6U xMqq1KL8+KLSnNTiQ4zSHCxK4rwzd70PERJITyxJzU5NLUgtgskycXBKNTCaFz70dWg8/LvM r8X7mYjt9Ue9Z3qMJ5Rk6Jpl7EjuOxE+97BE8ZwfL3+c2LT1w/aezb4PT4S//Gz3LNZmntf8 c0kGebu2Tue8NZNrEXuZbEioynuDZa7te95sn/HWd0c/59fVi2ebvsq++CQj5KBuYs1sg93e C2t0NQyjF86WtHzJnfhpJts7JZbijERDLeai4kQASXJnKJsCAAA= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10.09.2015 22:42, Javier Martinez Canillas wrote: > The simplefb driver allows the kernel to render on a pre-allocated > buffer that's been initialized by firmware before the kernel boots. > > This option was enabled to have display working on the Exynos5250 > Snow Chromebook by commit da9d0fbf5e9a ("ARM: exynos: defconfig > update") since proper DRM/KMS support did not exist at that time. > > But now that the Exynos DRM driver has support for this hardware, > there is no need to have simplefb enabled. In fact, if a user has > a u-boot that injects the simplefb dev node to the FDT before pass > it to the kernel, display won't be properly initialized and only a > blank screen will be shown since there isn't a proper handoff from > the simplefb driver to the Exynos DRM driver. > > Signed-off-by: Javier Martinez Canillas > > --- > > arch/arm/configs/exynos_defconfig | 1 - > 1 file changed, 1 deletion(-) Seems logical. None of the boards use simple-framebuffer compatible anyway. I understand that on Snow simplefb was needed along with change in Uboot like this one: https://chromium.googlesource.com/chromiumos/third_party/u-boot/+/refs/changes/58/49358/2 and now none of Exynos boards use simplefb anymore? Best regards, Krzysztof