[src/trunk]: src/sys/external/bsd/drm2/dist/drm/nouveau/core/engine/fifo don'...

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

details:   https://anonhg.NetBSD.org/src/rev/0191136f5e47
branches:  trunk
changeset: 341201:0191136f5e47
user:      mrg <mrg%NetBSD.org@localhost>
date:      Sun Oct 25 21:44:16 2015 +0000

description:
don't try to wait if (cold), spin waiting for registers to clear.

same as in nouveau_engine_fifo_nve0.c 1.5.  should fix PR#50362.

diffstat:

 sys/external/bsd/drm2/dist/drm/nouveau/core/engine/fifo/nouveau_engine_fifo_nvc0.c |  33 ++++++---
 1 files changed, 21 insertions(+), 12 deletions(-)

diffs (55 lines):

diff -r e2befe610f0a -r 0191136f5e47 sys/external/bsd/drm2/dist/drm/nouveau/core/engine/fifo/nouveau_engine_fifo_nvc0.c
--- a/sys/external/bsd/drm2/dist/drm/nouveau/core/engine/fifo/nouveau_engine_fifo_nvc0.c        Sun Oct 25 21:21:52 2015 +0000
+++ b/sys/external/bsd/drm2/dist/drm/nouveau/core/engine/fifo/nouveau_engine_fifo_nvc0.c        Sun Oct 25 21:44:16 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: nouveau_engine_fifo_nvc0.c,v 1.4 2015/02/28 05:38:49 riastradh Exp $   */
+/*     $NetBSD: nouveau_engine_fifo_nvc0.c,v 1.5 2015/10/25 21:44:16 mrg Exp $ */
 
 /*
  * Copyright 2012 Red Hat Inc.
@@ -25,7 +25,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nouveau_engine_fifo_nvc0.c,v 1.4 2015/02/28 05:38:49 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nouveau_engine_fifo_nvc0.c,v 1.5 2015/10/25 21:44:16 mrg Exp $");
 
 #include <core/client.h>
 #include <core/handle.h>
@@ -115,17 +115,26 @@
        nv_wr32(priv, 0x002274, 0x01f00000 | (p >> 3));
 
 #ifdef __NetBSD__
-    {
-       int ret;
+       if (cold) {
+               uint count = 2000;
+               while (count-- > 0) {
+                       if (!(nv_rd32(priv, 0x00227c) & 0x00100000))
+                               break;
+                       delay(1000);
+               }
+               if (count == 0)
+                       nv_error(priv, "runlist update timeout\n");
+       } else {
+               int ret;
 
-       spin_lock(&priv->runlist.lock);
-       DRM_SPIN_TIMED_WAIT_NOINTR_UNTIL(ret, &priv->runlist.wait,
-           &priv->runlist.lock, msecs_to_jiffies(2000),
-           !(nv_rd32(priv, 0x00227c) & 0x00100000));
-       if (ret == 0)
-               nv_error(priv, "runlist update timeout\n");
-       spin_unlock(&priv->runlist.lock);
-    }
+               spin_lock(&priv->runlist.lock);
+               DRM_SPIN_TIMED_WAIT_NOINTR_UNTIL(ret, &priv->runlist.wait,
+                   &priv->runlist.lock, msecs_to_jiffies(2000),
+                   !(nv_rd32(priv, 0x00227c) & 0x00100000));
+               if (ret == 0)
+                       nv_error(priv, "runlist update timeout\n");
+               spin_unlock(&priv->runlist.lock);
+       }
 #else
        if (wait_event_timeout(priv->runlist.wait,
                               !(nv_rd32(priv, 0x00227c) & 0x00100000),