Openmoko Bug #2345: all pixels are white after xset dpms force off/on

[Openmoko Public Trac]

#2345: all pixels are white after xset dpms force off/on
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 Reporter:  lindi   |          Owner:  openmoko-kernel
     Type:  defect  |         Status:  new            
 Priority:  normal  |      Milestone:                 
Component:  kernel  |        Version:  unspecified    
 Severity:  normal  |       Keywords:                 
 Haspatch:  0       |      Blockedby:                 
Estimated:          |    Patchreview:                 
 Blocking:          |   Reproducible:  always         
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Comment(by lindi):

 {{{
 diff --git a/drivers/video/backlight/jbt6k74.c
 b/drivers/video/backlight/jbt6k74.c
 index 8450904..c7aaf2d 100644
 --- a/drivers/video/backlight/jbt6k74.c
 +++ b/drivers/video/backlight/jbt6k74.c
 @@ -268,6 +268,8 @@ static int jbt_standby_to_sleep(struct jbt_info *jbt)
         gpio_set_value_cansleep(pdata->gpio_reset, 1);
         ret = regulator_bulk_enable(ARRAY_SIZE(jbt->supplies),
 jbt->supplies);

 +        msleep(200);
 +
         /* three times command zero */
         ret |= jbt_reg_write_nodata(jbt, 0x00);
         mdelay(1);

 }}}

 seems to workaround this bug. I got the idea from Thibaut Girka who
 recommended

 http://git.openembedded.org/cgit.cgi/openembedded/plain/recipes/linux
 /linux-openmoko-2.6.32/0016-jbt6k74-fix-WS.patch

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/2345#comment:3>
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