[src/trunk]: src/sys/external/bsd/drm2/drm if hooks init works, store the hoo...

[mrg <mrg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/030dddf94d8a
branches:  trunk
changeset: 835591:030dddf94d8a
user:      mrg <mrg%NetBSD.org@localhost>
date:      Thu Aug 30 22:39:54 2018 +0000

description:
if hooks init works, store the hooks in the agp.  fixes start up
crash on an old radeon laptop.  from @riastradh.

the console also now works, unlike previous drm2, where eg, the
problems from PR#49744 are seen.

unfortunately, i got a crash starting X, and no ddb yet, so we
can't re-enable the r100/r200 parts here yet.  once this is
known to be working we can delete the old radeondrm code, and
remove the hacks to disable drm2 there.

diffstat:

 sys/external/bsd/drm2/drm/drm_agp_hook.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r 03b4487c4015 -r 030dddf94d8a sys/external/bsd/drm2/drm/drm_agp_hook.c
--- a/sys/external/bsd/drm2/drm/drm_agp_hook.c  Thu Aug 30 19:03:14 2018 +0000
+++ b/sys/external/bsd/drm2/drm/drm_agp_hook.c  Thu Aug 30 22:39:54 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: drm_agp_hook.c,v 1.2 2018/08/30 19:03:14 tnn Exp $     */
+/*     $NetBSD: drm_agp_hook.c,v 1.3 2018/08/30 22:39:54 mrg Exp $     */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: drm_agp_hook.c,v 1.2 2018/08/30 19:03:14 tnn Exp $");
+__KERNEL_RCSID(0, "$NetBSD: drm_agp_hook.c,v 1.3 2018/08/30 22:39:54 mrg Exp $");
 
 #include <sys/types.h>
 #include <sys/condvar.h>
@@ -145,6 +145,8 @@
        agp = hooks->agph_init(dev);
        if (agp == NULL)
                drm_agp_hooks_release(hooks);
+       else
+               agp->hooks = hooks;
 
        return agp;
 }