From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Date: Thu, 08 Dec 2016 15:21:34 +0000 Subject: Re: [RFC PATCH 0/3] staging: remove fbdev drivers Message-Id: <20161208152134.wnv4j4i6m5xpoycp@phenom.ffwll.local> List-Id: 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> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Geert Uytterhoeven Cc: Thomas Petazzoni , Linux Fbdev development list , Teddy Wang , "linux-kernel@vger.kernel.org" , DRI Development , Tomi Valkeinen , Greg Kroah-Hartman , Sudip Mukherjee , Arnaud Patard [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). Cheers, Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch