Module Name: src
Committed By: tsutsui
Date: Wed Nov 30 11:36:50 UTC 2022
Modified Files:
src/sys/arch/hp300/dev: topcat.c
Log Message:
Fix silent bus error panic on 98543A topcat framebuffer on HP320 and HP360.
It looks DELAY(100)s before checking cmap_busy in old pre-wscons grf_tc.c
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/hp300/dev/Attic/grf_tc.c?rev=1.42
are actually necessary on 68020 (HP320) and 68030 (HP360) machines,
while it works without them on 68040 (HP380).
Should be pulled up to netbsd-9.
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/sys/arch/hp300/dev/topcat.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/hp300/dev/topcat.c
diff -u src/sys/arch/hp300/dev/topcat.c:1.5 src/sys/arch/hp300/dev/topcat.c:1.6
--- src/sys/arch/hp300/dev/topcat.c:1.5 Thu Apr 15 14:43:19 2021
+++ src/sys/arch/hp300/dev/topcat.c Wed Nov 30 11:36:50 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: topcat.c,v 1.5 2021/04/15 14:43:19 tsutsui Exp $ */
+/* $NetBSD: topcat.c,v 1.6 2022/11/30 11:36:50 tsutsui Exp $ */
/* $OpenBSD: topcat.c,v 1.15 2006/08/11 18:33:13 miod Exp $ */
/*
@@ -448,6 +448,8 @@ topcat_setcolor(struct diofb *fb, u_int
tc->gdata = fb->cmap.g[index];
tc->bdata = fb->cmap.b[index];
tc->strobe = 0xff;
+ /* XXX delay required on 68020/30 to avoid bus error */
+ DELAY(100);
tccm_waitbusy(tc);
tc->cindex = 0;
@@ -459,6 +461,8 @@ topcat_setcolor(struct diofb *fb, u_int
tc->bdata = fb->cmap.b[index];
tc->cindex = ~index;
tc->strobe = 0xff;
+ /* XXX delay required on 68020/30 to avoid bus error */
+ DELAY(100);
tccm_waitbusy(tc);
tc->rdata = 0;
