On Saturday, August 30, 2008 1:02 am Maksym Veremeyenko wrote: > Michel Dänzer написав(ла): > [...] > > >> Is it normal that no interrupts happens from board? > >> or i need more initializing ioctl call to /dev/dri/0 to allow interrupts > >> from hardware? > > > > This is probably due to the DRM_I830_SET_VBLANK_PIPE ioctl - the X > > driver uses it to disable the vblank interrupts while there are no GLX > > clients. This is a crude power saving scheme which will be superseded by > > the infamous DRM vblank-rework, which should work with your code. > > Thanks for some explanation, anyway i added more printk's to i915_irq.c > and drm_irq.c > > During xorg startup there are: > > ->drm_irq_install > -> drm_vblank_init > -> i915_enable_interrupt > > it successfully install irq and call *i915_enable_interrupt*. > > During *drmWaitVBlank* i got next call trace: > > drm_wait_vblank > -> drm_vblank_get > ->dev->driver->enable_vblank > ->i915_enable_vblank: plane=0, pipe=1, pipestat |= > PIPE_VBLANK_INTERRUPT_ENABLE > ->i915_enable_irq(00000010) > ->drm_update_vblank_count > i915_get_vblank_counter: plane=0, pipe=1, high_frame=00071040, > low_frame=00071044 > > i also get "enabling vblank interrupts on crtc 0, missed 246".... > > It seems to me that IRQ enable, but i have some suspicious about: > [...] > /* > * Older chips didn't have the start vblank interrupt, > * but > */ > if (IS_I965G (dev)) > pipestat |= PIPE_START_VBLANK_INTERRUPT_ENABLE; > else > pipestat |= PIPE_VBLANK_INTERRUPT_ENABLE; > [...] > but even if i enable both, /proc/interrupts still shows zeros interrupts > count....
With all the changes in DRM master I think things broke recently. In the drm-next relative patch I posted I fixed a few issues like this so hopefully that will work for you, let me know if they don't. Thanks, Jesse ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
