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
