On Tue, Mar 24, 2015 at 12:10:28PM -0400, Josh Boyer wrote: > On Tue, Mar 24, 2015 at 10:46 AM, Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> wrote: > > On Tue, Mar 24, 2015 at 10:34 AM, Daniel Vetter <daniel@xxxxxxxx> wrote: > >> On Tue, Mar 24, 2015 at 10:22:30AM -0400, Josh Boyer wrote: > >>> On Tue, Mar 24, 2015 at 9:57 AM, Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> wrote: > >>> > On Tue, Mar 24, 2015 at 9:40 AM, Daniel Vetter <daniel@xxxxxxxx> wrote: > >>> >> On Tue, Mar 24, 2015 at 09:15:32AM -0400, Josh Boyer wrote: > >>> >>> On Tue, Mar 24, 2015 at 3:32 AM, Daniel Vetter <daniel@xxxxxxxx> wrote: > >>> >>> > On Mon, Mar 23, 2015 at 02:34:27PM -0400, Josh Boyer wrote: > >>> >>> >> On Mon, Mar 23, 2015 at 11:33 AM, Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> wrote: > >>> >>> >> > >>> >>> >> <snip> > >>> >>> >> > >>> >>> >> >> Xi Ruoyao (1): > >>> >>> >> >> drm/i915: Ensure plane->state->fb stays in sync with plane->fb > >>> >>> >> > >>> >>> >> Turns out to be that commit. > >>> >>> >> > >>> >>> >> git bisect start 'drivers/gpu/drm/i915/' > >>> >>> >> # good: [b314acaccd7e0d55314d96be4a33b5f50d0b3344] Merge branch > >>> >>> >> 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input > >>> >>> >> git bisect good b314acaccd7e0d55314d96be4a33b5f50d0b3344 > >>> >>> >> # bad: [bc465aa9d045feb0e13b4a8f32cc33c1943f62d6] Linux 4.0-rc5 > >>> >>> >> git bisect bad bc465aa9d045feb0e13b4a8f32cc33c1943f62d6 > >>> >>> >> # bad: [319c1d420a0b62d9dbb88104afebaabc968cdbfa] drm/i915: Ensure > >>> >>> >> plane->state->fb stays in sync with plane->fb > >>> >>> >> git bisect bad 319c1d420a0b62d9dbb88104afebaabc968cdbfa > >>> >>> >> # first bad commit: [319c1d420a0b62d9dbb88104afebaabc968cdbfa] > >>> >>> >> drm/i915: Ensure plane->state->fb stays in sync with plane->fb > >>> >>> >> > >>> >>> >> Doing a straight revert on top of 4.0-rc5 makes things work again, > >>> >>> >> albeit with the WARN_ON(obj->frontbuffer_bits) splat still being > >>> >>> >> there. > >>> >>> > > >>> >>> > Can you please test the tip of drm-fixes: > >>> >>> > > >>> >>> > commit 8218c3f4df3bb1c637c17552405039a6dd3c1ee1 > >>> >>> > Author: Daniel Vetter <daniel.vetter@xxxxxxxx> > >>> >>> > Date: Fri Feb 27 12:58:13 2015 +0100 > >>> >>> > > >>> >>> > drm: Fixup racy refcounting in plane_force_disable > >>> >>> > > >>> >>> > http://cgit.freedesktop.org/~airlied/linux/commit/?h=drm-fixes&id=8218c3f4df3bb1c637c17552405039a6dd3c1ee1 > >>> >>> > > >>> >>> > Because fumble that patch didn't make it to drm-fixes a while ago and > >>> >>> > instead landed in drm-next. > >>> >>> > >>> >>> That seems to have helped with totally different issues a macbook I > >>> >>> have was seeing. However, it still doesn't fix the issue with the > >>> >>> Celeron based NUC machine. > >>> >>> > >>> >>> I built a kernel based on Linus' latest tree as of this morning, > >>> >>> without reverting 319c1d4 and adding the commit you pointed to. The > >>> >>> NUC still won't boot without HDMI connected. With HDMI connected I > >>> >>> still see the trace below. If I do the blacklist and then insmod > >>> >>> dance with HDMI unplugged it shows the same spew I reported yesterday > >>> >>> which starts with the same backtrace. > >>> >>> > >>> >>> I'll try building a kernel with 319c1d4 reverted + your patch. I > >>> >>> suspect things will work fine with that combination because the two > >>> >>> issues are unrelated. > >>> >> > >>> >> Can you please boot with drm.debug=0xff for the below case and grab > >>> >> complete dmesg? There'll be a lot of crap in the logs, you might need to > >>> >> blow up the logbuf size massively. But that log should contain everything > >>> >> I need to figure out where that framebuffer we're blowing up on is going. > >>> > > >>> > I provided both with HDMI attached and without (via insmod). If you > >>> > want them emailed directly let me know, but they were large. > >>> > > >>> > Boot with drm.debug=0xff and HDMI connected: > >>> > > >>> > https://jwboyer.fedorapeople.org/pub/drm-ff-dmesg.txt > >>> > > >>> > Boot with drm.debug=0xff without HDMI connected and i915 loaded via > >>> > manual insmod after boot: > >>> > > >>> > https://jwboyer.fedorapeople.org/pub/drm-ff-no-hdmi-insmod.txt > >>> > >>> Here's one more from the macbook I mentioned. It's showing the same > >>> kref.h splat: > >>> > >>> https://jwboyer.fedorapeople.org/pub/drm-ff-macbook.txt > >> > >> Ok there's at least one fixup for which we've failed to apply when porting > >> the fb refcounting fix from -next. Can you please cherry-pick > >> > >> commit f55548b5af87ebfc586ca75748947f1c1b1a4a52 > >> Author: Damien Lespiau <damien.lespiau@xxxxxxxxx> > >> Date: Thu Feb 5 18:30:20 2015 +0000 > >> > >> drm/i915: Don't try to reference the fb in get_initial_plane_config() > >> > >> From linux-next? > > > > Yes, building now. Will let you know as soon as I test it on both machines. > > OK, with that commit applied I no longer get the kref.h splat and the > NUC machine boots headless. I still see the backtrace below on both > the NUC and the macbook. I have a copy of it with drm.debug=0xff from > the NUC here: > > https://jwboyer.fedorapeople.org/pub/nuc-drm-debug-ff-with-fixes.txt > > Getting better at least :). On top of what you currently have please also cherry-pick commit fb9981aa675eb7b398849915364916fd98833cfa Author: Damien Lespiau <damien.lespiau@xxxxxxxxx> Date: Thu Feb 5 19:24:25 2015 +0000 drm/i915: Fix atomic state when reusing the firmware fb from -next. Let's hope this terminates eventually ;-) Thanks, Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
