Changeset 3513

Timestamp:

Jan 7, 2013 8:05:08 AM (4 months ago)

Author:

quozl

Message:

OLPC ARM - DCON unfreeze glitch reduction on 1.2 GHz SKUs. Increased the delay between waking screen and enabling DCONLOAD. Set scan line register in device setup. Solves #12394. Does not change #12377.

File:

• dev/olpc/dcon/mmp2dcon.fth (modified) (5 diffs)

dev/olpc/dcon/mmp2dcon.fth

@@ -88 +88 @@
 
 d# 850 value resumeline
+: scanint-set  resumeline scanint!  ;
 : mark-time  ( -- start-time )  get-msecs  ;
 : delta-ms  ( start-time -- elapsed-ms )  mark-time  swap -   ;
@@ -93 +94 @@
 : wait-output  ( -- )
    mark-time                                            ( start-time )
-   resumeline scanint!  setup-dcon-irq  scanint-on      ( )
+   setup-dcon-irq  scanint-on                           ( )
    begin                                                ( start-time )
       dcon-irq?  if                                     ( start-time )
@@ -138 +139 @@
       wait-output               \ Wait for the DCON to reach the scan line
       " wake" $call-screen      \ Enable video signal from SoC
-      d# 5 ms
+      d# 25 ms
       dcon-load                 \ Put the DCON in VGA-refreshed mode
       d# 25 ms                  \ Ensure that that DCON sees the DCONLOAD high
@@ -220 +221 @@
 
    h# 12 mode!
+   scanint-set
    false
 ;
@@ -248 +250 @@
 \   dcon-load  dcon-enable  ( maybe-set-cmos )
    \ dcon-enable leaves mode set to 69 - 40:antialias, 20:swizzle, 8:backlight on, 1:passthru off
+   scanint-set
    true
 ;