target/linux/s3c24xx/patches-2.6.26/1168-change-lcm-keep-power-faster-resume.patch.patch

   1 From b022e94ed594ce88e0aeec92d0cd56cc9aa2758d Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Fri, 25 Jul 2008 23:06:13 +0100
   4 Subject: [PATCH] change-lcm-keep-power-faster-resume.patch
   5
   6 The LCM spins for 100ms during resume for not much reason.  Leave it powered
   7 (it is meant to pull uA when suspended) and get nice fast resume to video.
   8
   9 Signed-off-by: Andy Green <andy@openmoko.com>
  10 ---
  11  arch/arm/mach-s3c2440/mach-gta02.c |    1 +
  12  drivers/video/display/jbt6k74.c    |   24 ++++--------------------
  13  2 files changed, 5 insertions(+), 20 deletions(-)
  14
  15 diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
  16 index accdbc5..d5841d7 100644
  17 --- a/arch/arm/mach-s3c2440/mach-gta02.c
  18 +++ b/arch/arm/mach-s3c2440/mach-gta02.c
  19 @@ -553,6 +553,7 @@ static struct pcf50633_platform_data gta02_pcf_pdata = {
  20                 },
  21                 [PCF50633_REGULATOR_LDO6] = {
  22                         .name           = "user1",
  23 +                       .flags = PMU_VRAIL_F_SUSPEND_ON,
  24                         .voltage        = {
  25                                 .init   = 0,
  26                                 .max    = 3300,
  27 diff --git a/drivers/video/display/jbt6k74.c b/drivers/video/display/jbt6k74.c
  28 index 7cc00ad..6fa1fe7 100644
  29 --- a/drivers/video/display/jbt6k74.c
  30 +++ b/drivers/video/display/jbt6k74.c
  31 @@ -628,7 +628,7 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state)
  32         struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
  33         struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
  34
  35 -       /* platform needs to register resume dependencies here */
  36 +       /* platform can register resume dependencies here, if any */
  37         if (jbt6k74_pdata->suspending)
  38                 (jbt6k74_pdata->suspending)(0, spi);
  39
  40 @@ -638,7 +638,7 @@ static int jbt_suspend(struct spi_device *spi, pm_message_t state)
  41
  42         jbt->have_resumed = 0;
  43
  44 -       (jbt6k74_pdata->reset)(0, 0);
  45 +/*     (jbt6k74_pdata->reset)(0, 0); */
  46
  47         return 0;
  48  }
  49 @@ -648,31 +648,17 @@ int jbt6k74_resume(struct spi_device *spi)
  50         struct jbt_info *jbt = dev_get_drvdata(&spi->dev);
  51         struct jbt6k74_platform_data *jbt6k74_pdata = spi->dev.platform_data;
  52
  53 -       /* if we still wait on dependencies, exit because we will get called
  54 -        * again.  This guy will get called once by core resume action, and
  55 -        * should be set as resume_dependency callback for any dependencies
  56 -        * set by platform code.
  57 -        */
  58 -
  59         if (jbt6k74_pdata->all_dependencies_resumed)
  60                 if (!(jbt6k74_pdata->all_dependencies_resumed)(0))
  61                         return 0;
  62
  63         /* we can get called twice with all dependencies resumed if our core
  64 -        * resume callback is last of all.  Protect against going twice
  65 +        * resume callback is last of all.  Protect against doing anything twice
  66          */
  67         if (jbt->have_resumed)
  68                 return 0;
  69
  70 -       jbt->have_resumed = 1;
  71 -
  72 -       /* OK we are sure all devices we depend on for operation are up now */
  73 -
  74 -       /* even this needs glamo up on GTA02 :-/ */
  75 -       (jbt6k74_pdata->reset)(0, 1);
  76 -
  77 -       jbt6k74_enter_state(jbt, JBT_STATE_DEEP_STANDBY);
  78 -       msleep(100);
  79 +       jbt->have_resumed |= 1;
  80
  81         switch (jbt->last_state) {
  82         case JBT_STATE_QVGA_NORMAL:
  83 @@ -684,8 +670,6 @@ int jbt6k74_resume(struct spi_device *spi)
  84         }
  85         jbt6k74_display_onoff(jbt, 1);
  86
  87 -       /* this gives the platform a chance to bring up backlight now */
  88 -
  89         if (jbt6k74_pdata->resuming)
  90                 (jbt6k74_pdata->resuming)(0);
  91
  92 --
  93 1.5.6.3
  94