[openfirmware] [commit] r2493 - dev/olpc/dcon
repository service
svn at openfirmware.info
Wed Aug 31 10:24:22 CEST 2011
Author: wmb
Date: Wed Aug 31 10:24:22 2011
New Revision: 2493
URL: http://tracker.coreboot.org/trac/openfirmware/changeset/2493
Log:
XO-1.75 - DCON driver - Use GPIO edge detection hardware to avoid the need for disabling interrupts while waiting for DCON freeze - prevents audio buffer underrun.
Modified:
dev/olpc/dcon/mmp2dcon.fth
Modified: dev/olpc/dcon/mmp2dcon.fth
==============================================================================
--- dev/olpc/dcon/mmp2dcon.fth Wed Aug 31 10:22:38 2011 (r2492)
+++ dev/olpc/dcon/mmp2dcon.fth Wed Aug 31 10:24:22 2011 (r2493)
@@ -75,7 +75,8 @@
[then]
\ : dcon-blnk? ( -- flag ) ; \ Not hooked up
: dcon-stat@ ( -- n ) h# 019100 io@ 4 rshift 3 and ;
-: dcon-irq? ( -- flag ) d# 124 gpio-pin@ 0= ;
+: setup-dcon-irq ( -- ) d# 124 dup gpio-set-fer gpio-clr-edge ;
+: dcon-irq? ( -- flag ) d# 124 gpio-edge@ ;
\ DCONSTAT values: 0 SCANINT 1 SCANINT_DCON 2 DISPLAYLOAD 3 MISSED
@@ -122,8 +123,9 @@
else
has-dcon-ram? if
begin ( )
+ setup-dcon-irq
dcon-unload \ Put the DCON in self-refresh mode
- lock[ wait-dcon-mode ]unlock ( retry? )
+ wait-dcon-mode ( retry? )
\ display-off ( retry? )
while ( )
\ We got a false ack from the DCON so start over from LOAD state
More information about the openfirmware
mailing list