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authormacallan <macallan@NetBSD.org>2012-07-13 19:48:45 +0000
committermacallan <macallan@NetBSD.org>2012-07-13 19:48:45 +0000
commita2b96478bcacf81318d010080e8686de4600880e (patch)
tree818469fb930bbfd854ed9af4443b5a3a585ebde5 /sys/dev/sun
parent8529117ee4aceaa506c60cb87accef5d02212c4e (diff)
wait for the blitter to go idle before trying to send another command
Apparently on some CG6 the GX_FULL bit is not a reliable indication wether the engine is ready to accept another command ( LX onboard for example ) - might be a hardware bug.
Diffstat (limited to 'sys/dev/sun')
-rw-r--r--sys/dev/sun/cgsix.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/sys/dev/sun/cgsix.c b/sys/dev/sun/cgsix.c
index 48ebe5b838c..3d20973aca1 100644
--- a/sys/dev/sun/cgsix.c
+++ b/sys/dev/sun/cgsix.c
@@ -1,4 +1,4 @@
-/* $NetBSD: cgsix.c,v 1.57 2012/07/12 01:20:22 macallan Exp $ */
+/* $NetBSD: cgsix.c,v 1.58 2012/07/13 19:48:45 macallan Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -78,7 +78,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cgsix.c,v 1.57 2012/07/12 01:20:22 macallan Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cgsix.c,v 1.58 2012/07/13 19:48:45 macallan Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -303,8 +303,16 @@ int cgsix_use_rasterconsole = 1;
/*EMPTY*/; \
} while (0)
+/*
+ * something is missing here
+ * Waiting for GX_FULL to clear should be enough to send another command
+ * but some CG6 ( LX onboard for example ) lock up if we do that while
+ * it works fine on others ( a 4MB TGX+ I've got here )
+ * So, until I figure out what's going on we wait for the blitter to go
+ * fully idle.
+ */
#define CG6_WAIT_READY(fbc) do { \
- while (((fbc)->fbc_s & GX_FULL) != 0) \
+ while (((fbc)->fbc_s & GX_INPROGRESS/*GX_FULL*/) != 0) \
/*EMPTY*/; \
} while (0)