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 <ekurzin...@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,
};
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