svn commit: r348059 - head/sys/dev/vt/hw/efifb

[Ed Maste]

Author: emaste
Date: Tue May 21 18:42:36 2019
New Revision: 348059
URL: https://svnweb.freebsd.org/changeset/base/348059

Log:
  vt efifb: add suspend/resume calls
  
  Using the latest NVIDIA driver, upon resuming from suspend with X
  running the display remained blank.  Additionally OpenGL applications
  that were running triggered a number of error messages from the NVIDIA
  driver.
  
  This occurred because the vt efifb back-end did not signal the X server
  to release the display before suspending (or to re-acquire it after
  resuming).  The NVIDIA driver includes code for smoothly shutting down
  and re-initializing the GPU, which was not getting called.
  
  Since the NVIDIA driver doesn't currently support framebuffer devices
  and vt is forced to fall back to the efifb back-end, add vd_suspend and
  vd_resume members to connect the suspend/resume path.  This ensures the
  X server is properly able to re-initialize the display.
  
  PR:		237050
  Submitted by:	Erik Kurzinger <ekurzinger at nvidia.com>
  Reviewed by:	markj
  MFC after:	2 weeks
  Event:		Waterloo Hackathon 2019

Modified:
  head/sys/dev/vt/hw/efifb/efifb.c

Modified: head/sys/dev/vt/hw/efifb/efifb.c
==============================================================================
--- head/sys/dev/vt/hw/efifb/efifb.c	Tue May 21 18:08:19 2019	(r348058)
+++ head/sys/dev/vt/hw/efifb/efifb.c	Tue May 21 18:42:36 2019	(r348059)
@@ -64,6 +64,8 @@ static struct vt_driver vt_efifb_driver = {
 	.vd_setpixel = vt_fb_setpixel,
 	.vd_fb_ioctl = vt_fb_ioctl,
 	.vd_fb_mmap = vt_fb_mmap,
+	.vd_suspend = vt_suspend,
+	.vd_resume = vt_resume,
 	/* Better than VGA, but still generic driver. */
 	.vd_priority = VD_PRIORITY_GENERIC + 1,
 };