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Groups > linux.kernel > #1329996
| From | Daniel Vetter <daniel@ffwll.ch> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: BUG caused by "Use new drm_fb_helper functions" series |
| Date | 2016-02-09 10:40 +0100 |
| Message-ID | <r0cW6-28I-5@gated-at.bofh.it> (permalink) |
| References | <qXtqq-8iB-29@gated-at.bofh.it> <qXBHj-62A-3@gated-at.bofh.it> <qXO1S-76E-61@gated-at.bofh.it> <qY24O-aO-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Feb 03, 2016 at 06:30:54PM +0900, Michel Dänzer wrote: > On 03.02.2016 03:38, Peter Hurley wrote: > > On 02/01/2016 09:20 PM, Archit Taneja wrote: > >> Hi Peter, > >> > >> On 02/02/2016 02:07 AM, Peter Hurley wrote: > >>> Hi Archit, > >>> > >>> Just booting 4.4-rc5+, I got this splat [1] > >>> At first glance, this appears to be a simple fix. > >> > >> Thanks for sharing this. > >> > >>> > >>> However, I'm concerned that fbcon functions, which may be called with > >>> interrupts disabled, are now hooked up to fbdev functions which may assume > >>> interrupts are not disabled (as is the case with cfb_imageblit()). > >> > >> In the case when CONFIG_FB is enabled, drm_fb_helper_cfb_imageblit > >> helper simply wraps around cfg_imageblit, so I don't see how we'd have > >> any difference in behaviour. > > > > > > Sorry; terrible attribution on my part. > > This bug clearly has nothing to do with this series. > > > > But a better look has me wondering how all these gpus are syncing > > the framebuffer for direct access via cfb_imageblit and friends. I only see > > nouveau and intel gma even trying. > > Probably no other DRM driver uses hardware acceleration for fbcon. Yup. We've had patches for i915, resulted in half of mesa+glamour in-kernel, which is just pointless. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
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BUG caused by "Use new drm_fb_helper functions" series Peter Hurley <peter@hurleysoftware.com> - 2016-02-01 21:40 +0100
Re: BUG caused by "Use new drm_fb_helper functions" series Archit Taneja <architt@codeaurora.org> - 2016-02-02 06:30 +0100
Re: BUG caused by "Use new drm_fb_helper functions" series Peter Hurley <peter@hurleysoftware.com> - 2016-02-02 19:40 +0100
Re: BUG caused by "Use new drm_fb_helper functions" series Michel Dänzer <michel@daenzer.net> - 2016-02-03 10:40 +0100
Re: BUG caused by "Use new drm_fb_helper functions" series Daniel Vetter <daniel@ffwll.ch> - 2016-02-09 10:40 +0100
Re: BUG caused by "Use new drm_fb_helper functions" series One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-02-09 14:50 +0100
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