Date: Fri, 18 May 2018 15:39:13 -0700 From: Cy Schubert <Cy.Schubert@cschubert.com> To: Oliver Pinter <oliver.pinter@hardenedbsd.org> Cc: Konstantin Belousov <kostikbel@gmail.com>, Ben Widawsky <ben@bwidawsk.net>, Current FreeBSD <freebsd-current@freebsd.org>, Steve Kargl <sgk@troutmask.apl.washington.edu>, FreeBSD X11 mailing list <freebsd-x11@freebsd.org>, Warner Losh <imp@bsdimp.com> Subject: Re: [RFC] Deprecation and removal of the drm2 driver Message-ID: <201805182239.w4IMdDsJ033410@slippy.cwsent.com> In-Reply-To: Message from Oliver Pinter <oliver.pinter@hardenedbsd.org> of "Fri, 18 May 2018 23:59:46 %2B0200." <CAPQ4ffv1HxR0H8zPMgcp7eYRohLoSBEW2RE1UmcXuv7cbJUzyg@mail.gmail.com>
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In message <CAPQ4ffv1HxR0H8zPMgcp7eYRohLoSBEW2RE1UmcXuv7cbJUzyg@mail.gma il.com> , Oliver Pinter writes: > On Friday, May 18, 2018, Konstantin Belousov <kostikbel@gmail.com> wrote: > > > On Fri, May 18, 2018 at 09:33:40PM +0100, Johannes Lundberg wrote: > > > On Fri, May 18, 2018 at 9:22 PM, Ben Widawsky <ben@bwidawsk.net> wrote: > > > > > > > On 18-05-18 14:15:03, Warner Losh wrote: > > > > > On Fri, May 18, 2018 at 2:12 PM, Johannes Lundberg < > > johalun0@gmail.com> > > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > On Fri, May 18, 2018 at 9:03 PM, Warner Losh <imp@bsdimp.com> > > wrote: > > > > > > > > > > > >> On Fri, May 18, 2018 at 1:30 PM, Steve Kargl < > > > > > >> sgk@troutmask.apl.washington.edu> wrote: > > > > > >> > > > > > >> > On Fri, May 18, 2018 at 09:14:24PM +0200, Andreas Nilsson wrote: > > > > > >> > > On Fri, May 18, 2018, 20:00 Niclas Zeising < > > zeising@freebsd.org> > > > > > >> wrote: > > > > > >> > > > > > > > >> > > > I propose that we remove the old drm2 driver (sys/dev/drm2) > > from > > > > > >> > > > FreeBSD. I suggest the driver is marked as deprecated in > > 11.x > > > > and > > > > > >> > > > removed from 12.0, as was done for other drivers recently. > > Some > > > > > >> > > > background and rationale: > > > > > >> > > > > > > > > >> > > > The drm2 driver was the original port of a KMS driver to > > > > FreeBSD. > > > > > >> It > > > > > >> > > > was done by Konstantin Belousov to support Intel graphics > > > > cards, and > > > > > >> > > > later extended by Jean-S??bastien P??dron as well as > > Konstantin to > > > > > >> match > > > > > >> > > > what's in Linux 3.8. This included unstable support from > > > > Haswell, > > > > > >> but > > > > > >> > > > nothing newer than that. > > > > > >> > > > > > > > > >> > > > For quite some time now we have had the > > > > graphics/drm-stable-kmod and > > > > > >> > > > graphics/drm-next-kmods which provides support for modern > > AMD > > > > and > > > > > >> Intel > > > > > >> > > > graphics cards. These ports, together with the linuxkpi, or > > > > lkpi, > > > > > >> has > > > > > >> > > > made it significantly easier to port and update our graphics > > > > > >> drivers. > > > > > >> > > > Further, these new drivers cover the same drivers as the old > > > > drm2 > > > > > >> > driver. > > > > > >> > > > > > > > > >> > > > What does the community think? Is there anyone still using > > the > > > > drm2 > > > > > >> > > > driver on 12-CURRENT? If so, what is preventing you from > > > > switching > > > > > >> to > > > > > >> > > > the port? > > > > > >> > > > > > > > > >> > > > Thank you > > > > > >> > > > Regards > > > > > >> > > > -- > > > > > >> > > > Niclas Zeising > > > > > >> > > > FreeBSD x11/graphics team > > > > > >> > > > _______________________________________________ > > > > > >> > > > freebsd-current@freebsd.org mailing list > > > > > >> > > > https://lists.freebsd.org/mailman/listinfo/freebsd-current > > > > > >> > > > To unsubscribe, send any mail to > > "freebsd-current-unsubscribe@ > > > > > >> > freebsd.org" > > > > > >> > > > > > > > > >> > > > > > > > >> > > Sounds good ( deprecate resp remove ). It causes more > > confusion > > > > and > > > > > >> > > problems and it solves nothing. > > > > > >> > > > > > > > >> > > > > > > >> > Check the Makefiles > > > > > >> > > > > > > >> > % more /usr/ports/graphics/drm-next-kmod/Makefile > > > > > >> > > > > > > >> > ONLY_FOR_ARCHS= amd64 > > > > > >> > ONLY_FOR_ARCHS_REASON= the new KMS components are only > > supported on > > > > > >> amd64 > > > > > >> > > > > > > >> > Not to ia32 friendly. > > > > > >> > > > > > > >> > > > > > >> So do people use i386 for desktop? And need the latest KMS stuff? > > > > > >> > > > > > > > > > > > > Yeah I was wondering the same.. If you're running i386, do you > > need drm > > > > > > drivers? Will scfb work an i386? (probably has legacy bios and if I > > > > > > remember correctly, scfb is UEFI only) > > > > > > I do feel sorry for anyone who would have to revert back to VESA... > > > > > > > > > > > > Would it be too much trouble to move it to a port? > > > > > > > > > > > > > > > > If there's someone who needs it for i386, and wants to do the work > > and > > > > > maintain it, we should allow it. But the drm2 maintainers have said > > its > > > > > likely totally broken anyway. > > > > > > > > > > Warner > > > > > > > > As a long time developer in drm/i915, and newly interested in FreeBSD > > (ie. > > > > no > > > > history on the matter), is there some upside and/or desire to have > > native > > > > support, or is the drm-next-kmod solution good enough? > > > > > > > > > > Given the fast evolution of graphics hardware and the amount of code in > > > only the AMD and Intel drivers, keep several native implementations seems > > > impossible, if not wasteful. > > > If you are referring to drm2 in the kernel, that's not much more native > > > than the drm kmods, it still uses a linux compatibility layer (but not as > > > sophisticated). > > Drm2 does not use linux compat layer. > > > > drm2 is probably better on older chipsets which use AGP emulation, i.e. > > everything up to SandyBridge-1. Does drm-next run on gen3 and gen4 at > > all ? In particular, I did obtained real bug reports from people running > > gen 3 hardware. E.g. you cannot run amd64 kernel on T60, but you can run > > i386 and get hw support with drm2. > > > > I still have GM45 (gen4) laptop and use it daily with the drm from the > > tree. I effectively dropped supporting it when half of the HSW support > > code were imported. > > > I use the in tree DRM2 code on multiple Haswell based laptops. It working > fine. So I prefer to keep it in the tree. I also use it on an Acer 4752 (64-bit, Sandy Bridge, HD 3000, 1366x600) and rarely on my i386 test machine, an Acer 3624 (32-bit, Penium M, i915, 1280x768). Also with an HP 2009m (1600x900) monitor. > > I like to use bigger console, even if I not install anything from ports. Indeed. -- Cheers, Cy Schubert <Cy.Schubert@cschubert.com> FreeBSD UNIX: <cy@FreeBSD.org> Web: http://www.FreeBSD.org The need of the many outweighs the greed of the few.
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