Path: csiph.com!aioe.org!news.mixmin.net!weretis.net!feeder1.news.weretis.net!newsfeed.CARNet.hr!news.spin.it!bofh.it!news.nic.it!robomod From: ethan zhao Newsgroups: linux.kernel Subject: Re: [PATCH] x86/simplefb: simplefb was broken on Oracle and HP system, skip VIDEO_TYPE_EFI Date: Tue, 09 Jun 2015 10:10:03 +0200 Message-ID: References: X-Original-To: David Herrmann Organization: Oracle Corporation User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 67 X-Original-Cc: Matt Fleming , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Fabian Frederick , the arch/x86 maintainers , linux-kernel , ethan.kernel@gmail.com, linux-efi@vger.kernel.org X-Original-Date: Tue, 09 Jun 2015 16:04:22 +0800 X-Original-Message-ID: <55769E06.4020001@oracle.com> X-Original-References: <1432712748-11344-1-git-send-email-ethan.zhao@oracle.com> <20150605091713.GD6826@codeblueprint.co.uk> X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: aioe.org linux.kernel:1161114 On 2015/6/5 17:31, David Herrmann wrote: > Hi > > On Fri, Jun 5, 2015 at 11:17 AM, Matt Fleming wrote: >> (Cc'ing David) >> >> On Wed, 27 May, at 04:45:48PM, Ethan Zhao wrote: >>> As descriped in https://bugzilla.kernel.org/show_bug.cgi?id=98721 >>> When kernel 4.0.4 was tested on Oracle and HP system with UEFI mode, no output and >>> login on console. >>> >>> Simplefb was broken on these systems when orig_video_isVGA is VIDEO_TYPE_EFI, so >>> skip it. >>> >>> This patch was tested on Oracle Sun server X5-2 series and HP ProLiant DL380 Gen9 >>> with kernel 4.0.4 >>> >>> Signed-off-by: Ethan Zhao >>> Tested-by: Kunlun Lao >>> --- >>> arch/x86/kernel/sysfb_simplefb.c | 2 +- >>> 1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/arch/x86/kernel/sysfb_simplefb.c b/arch/x86/kernel/sysfb_simplefb.c >>> index 764a29f..f833502 100644 >>> --- a/arch/x86/kernel/sysfb_simplefb.c >>> +++ b/arch/x86/kernel/sysfb_simplefb.c >>> @@ -36,7 +36,7 @@ __init bool parse_mode(const struct screen_info *si, >>> unsigned int i; >>> >>> type = si->orig_video_isVGA; >>> - if (type != VIDEO_TYPE_VLFB && type != VIDEO_TYPE_EFI) >>> + if (type != VIDEO_TYPE_VLFB) >>> return false; >>> >>> for (i = 0; i < ARRAY_SIZE(formats); ++i) { >> This patch makes sense to me, but I'd really like David to fill us in on >> the rationale for including VIDEO_TYPE_EFI in the simplefb list in first >> place, and whether he's aware of any platforms that require simplefb for >> UEFI. > simplefb works perfectly fine on EFI systems. There is no need to use > vesafb nor efifb anymore. If simplefb does not work on a platform, we > should fix it. Hence, I object to this patch. Can you elaborate what > exactly the problem is? Are you sure you have CONFIG_FB_SIMPLE=y? Yes, no CONFIG_FB_SIMPLE set. > > If you really want to use efifb instead, please set > CONFIG_X86_SYSFB=n. CONFIG_X86_SYSFB=n. Works. > This config option controls whether you want > firmware framebuffers to be converted to the generic > simple-framebuffer interface, or whether you want to use the old > vesa/efi-framebuffer interfaces. > > Thanks > David Thanks, Ethan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/