Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752511AbdLLTsf (ORCPT ); Tue, 12 Dec 2017 14:48:35 -0500 Received: from us01smtprelay-2.synopsys.com ([198.182.60.111]:46350 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752256AbdLLTse (ORCPT ); Tue, 12 Dec 2017 14:48:34 -0500 From: Alexey Brodkin To: "pavel@ucw.cz" CC: "linux-kernel@vger.kernel.org" , "daniel.vetter@ffwll.ch" , "hshi@chromium.org" , "linux-snps-arc@lists.infradead.org" , "tutankhamen@chromium.org" , "Jose.Abreu@synopsys.com" , "airlied@redhat.com" , "dri-devel@lists.freedesktop.org" , "airlied@gmail.com" Subject: Re: UDL's fbdev doesn't work for user-space apps Thread-Topic: UDL's fbdev doesn't work for user-space apps Thread-Index: AQHTbPOhbJ0JAUja+kaaHKzVj8YXjqMzAYsAgAg3xgCABOBDAA== Date: Tue, 12 Dec 2017 19:48:05 +0000 Message-ID: <1513108084.4945.27.camel@synopsys.com> References: <1512387175.4977.24.camel@synopsys.com> <86238def-82be-2ad1-63d0-b9a8dbf83db6@synopsys.com> <20171209172022.GC19862@localhost> In-Reply-To: <20171209172022.GC19862@localhost> Accept-Language: en-US, ru-RU Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.121.8.74] Content-Type: text/plain; charset="utf-8" Content-ID: <78143454A109DA448A80FA3259AFA7B2@internal.synopsys.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by nfs id vBCJmddM015313 Content-Length: 792 Lines: 29 Hi Pavel, On Sat, 2017-12-09 at 18:20 +0100, Pavel Machek wrote: > On Mon 2017-12-04 11:50:40, Jose Abreu wrote: > > > > Hi Alexey, > > > > On 04-12-2017 11:32, Alexey Brodkin wrote: > > > > > > My first [probably incorrect] assumption is Xserver requires fbdev (/dev/fbX) > > > and it cannot use DRI video card natively. Is that correct? > > > > > > > > > > Xserver can use DRI directly, you need to enable modesetting > > driver in Xorg config or use the designated driver for your card > > (if there is any). > > Still, dev/fb1 should work. Agree, but it doesn't :) Even on completely different architectures (ARC and ARM). > Can be tested using dd, even :-) Most probably so but not in case of UDL as of today :( I mean as long as it does't work dd etc make no sense. -Alexey