Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932465AbcLIIax (ORCPT ); Fri, 9 Dec 2016 03:30:53 -0500 Received: from mail-wm0-f67.google.com ([74.125.82.67]:35386 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751214AbcLIIah (ORCPT ); Fri, 9 Dec 2016 03:30:37 -0500 Date: Fri, 9 Dec 2016 09:30:44 +0100 From: Daniel Vetter To: Geert Uytterhoeven , Thomas Petazzoni , Benjamin Herrenschmidt , Tomi Valkeinen , Greg Kroah-Hartman , Noralf =?iso-8859-1?Q?Tr=F8nnes?= , Sudip Mukherjee , Teddy Wang , Arnaud Patard , DRI Development , Linux Fbdev development list , "linux-kernel@vger.kernel.org" Subject: Re: [RFC PATCH 0/3] staging: remove fbdev drivers Message-ID: <20161209083044.vr23mrvxovcpkutj@phenom.ffwll.local> Mail-Followup-To: Geert Uytterhoeven , Thomas Petazzoni , Benjamin Herrenschmidt , Tomi Valkeinen , Greg Kroah-Hartman , Noralf =?iso-8859-1?Q?Tr=F8nnes?= , Sudip Mukherjee , Teddy Wang , Arnaud Patard , DRI Development , Linux Fbdev development list , "linux-kernel@vger.kernel.org" References: <1479888193-23908-1-git-send-email-tomi.valkeinen@ti.com> <1481158879.26959.41.camel@kernel.crashing.org> <20161208101005.6ufl3d4qvwprosju@phenom.ffwll.local> <20161208140210.rfyjf2265flsfpfj@phenom.ffwll.local> <20161208153735.74d7d350@free-electrons.com> <20161208152134.wnv4j4i6m5xpoycp@phenom.ffwll.local> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161208152134.wnv4j4i6m5xpoycp@phenom.ffwll.local> X-Operating-System: Linux phenom 4.8.0-1-amd64 User-Agent: NeoMutt/20161104 (1.7.1) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2370 Lines: 53 On Thu, Dec 08, 2016 at 04:21:34PM +0100, Daniel Vetter wrote: > [back from my walk, the sunset here is stellar ;-)] > > On Thu, Dec 08, 2016 at 03:44:30PM +0100, Geert Uytterhoeven wrote: > > Hi Thomas, > > > > On Thu, Dec 8, 2016 at 3:37 PM, Thomas Petazzoni > > wrote: > > > On Thu, 8 Dec 2016 15:22:09 +0100, Geert Uytterhoeven wrote: > > >> > Wut. We have like 20+ small atomic drivers nowdays. > > >> > > >> That's fast! Only two weeks ago you said: > > >> > > >> | Bummer, they still haven't landed. But afaik there's at least 4 of > > >> | them floating around in various places ... > > > > > > You're not talking about the same thing I believe. > > > > > > When Daniel says "small atomic drivers", he talks about the relatively > > > small DRM drivers for SoC display controllers, such as the ones you can > > > find in ARM SoCs. > > > > > > When you say "small driver", you're thinking about drivers for I2C or > > > SPI connected displays. > > > > No, I wasn't thinking about I2C or SPI connected displays, but about simple > > dumb memory-mapped frame buffers, which is what fbdev was initially > > developed for. > > Yeah, small drivers like these we have piles now, things exploded a lot > after atomic landed two years ago. And they seem to shrink with every > release a bit more (since lots more drivers gives you lots more insight > into what other refactorings would make sense). Those we have a big pile > of, and nowadays (at least with developers expirienced with upstream, but > not necessarily with drm) it takes but a few weeks from initial submission > to getting them merged. > > What we don't yet have a nice tidy example driver of is the even simpler > "dumb framebuffer behind a slow bus with explicit/manual upload", for like > small i2c/spi panels (and conceptually also usb, even though there bw and > panel size are a bit scaled up). We've gained some really nice helpers for > this this year, and there's 3 drivers in-flight to make use of it. But > since that's right now just a hobbyist effort it's moving a bit slower > (and I was mistaken a few weeks back where I assumed that one of them > landed already). Correction, MXSFB just landed, which is the first driver using the simple display pipe helpers. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch