Hi Tina,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-intel/for-linux-next]
[cannot apply to v5.3 next-20190920]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Tina-Zhang/Deliver-vGPU-display-refresh-event-to-userspace/20190924-145111
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-fedora-25 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/gpu/drm/i915/gvt/display.c: In function 'emulate_vblank_on_pipe':
>> drivers/gpu/drm/i915/gvt/display.c:429:10: error: 'struct intel_vgpu' has no member named 'vdev'
     if (vgpu->vdev.vblank_trigger && !vgpu->vdev.display_event_mask &&
             ^~
   drivers/gpu/drm/i915/gvt/display.c:429:40: error: 'struct intel_vgpu' has no member named 'vdev'
     if (vgpu->vdev.vblank_trigger && !vgpu->vdev.display_event_mask &&
                                           ^~
   drivers/gpu/drm/i915/gvt/display.c:431:22: error: 'struct intel_vgpu' has no member named 'vdev'
      eventfd_signal(vgpu->vdev.vblank_trigger, eventfd_signal_val);
                         ^~

vim +429 drivers/gpu/drm/i915/gvt/display.c

   393	
   394	static void emulate_vblank_on_pipe(struct intel_vgpu *vgpu, int pipe)
   395	{
   396		struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
   397		struct intel_vgpu_irq *irq = &vgpu->irq;
   398		int vblank_event[] = {
   399			[PIPE_A] = PIPE_A_VBLANK,
   400			[PIPE_B] = PIPE_B_VBLANK,
   401			[PIPE_C] = PIPE_C_VBLANK,
   402		};
   403		int pri_flip_event = SKL_FLIP_EVENT(pipe, PLANE_PRIMARY);
   404		int event;
   405		u64 eventfd_signal_val = 0;
   406	
   407		if (pipe < PIPE_A || pipe > PIPE_C)
   408			return;
   409	
   410		for_each_set_bit(event, irq->flip_done_event[pipe],
   411				INTEL_GVT_EVENT_MAX) {
   412			clear_bit(event, irq->flip_done_event[pipe]);
   413			if (!pipe_is_enabled(vgpu, pipe))
   414				continue;
   415	
   416			if (event == pri_flip_event)
   417				eventfd_signal_val |= DISPLAY_PRI_REFRESH_EVENT_VAL;
   418	
   419			intel_vgpu_trigger_virtual_event(vgpu, event);
   420		}
   421	
   422		if (eventfd_signal_val)
   423			vgpu->no_pageflip_count = 0;
   424		else if (!eventfd_signal_val && vgpu->no_pageflip_count > PAGEFLIP_DELAY_THR)
   425			eventfd_signal_val |= DISPLAY_PRI_REFRESH_EVENT_VAL;
   426		else
   427			vgpu->no_pageflip_count++;
   428	
 > 429		if (vgpu->vdev.vblank_trigger && !vgpu->vdev.display_event_mask &&
   430			eventfd_signal_val)
   431			eventfd_signal(vgpu->vdev.vblank_trigger, eventfd_signal_val);
   432	
   433		if (pipe_is_enabled(vgpu, pipe)) {
   434			vgpu_vreg_t(vgpu, PIPE_FRMCOUNT_G4X(pipe))++;
   435			intel_vgpu_trigger_virtual_event(vgpu, vblank_event[pipe]);
   436		}
   437	}
   438	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation