src/patches/suse-2.6.27.25/patches.arch/acpi_video_thinkpad_exclude_IGD_devices.patch

   1 From: Thomas Renninger <trenn@suse.de>
   2 Subject: Do not use video backlight switching for Lenovo ThinkPads
   3 Patch-Mainline: never
   4
   5 Mainline will go the IGD driver way which is too new and untested for
   6 SLE11.
   7
   8 ---
   9  drivers/acpi/video.c        |   17 ++++++++++++++---
  10  drivers/acpi/video_detect.c |    2 +-
  11  2 files changed, 15 insertions(+), 4 deletions(-)
  12
  13 --- a/drivers/acpi/video.c
  14 +++ b/drivers/acpi/video.c
  15 @@ -731,7 +731,7 @@ static void acpi_video_device_find_cap(s
  16  {
  17         acpi_handle h_dummy1;
  18         u32 max_level = 0;
  19 -
  20 +       unsigned long acpi_video_support;
  21
  22         memset(&device->cap, 0, sizeof(device->cap));
  23
  24 @@ -759,8 +759,19 @@ static void acpi_video_device_find_cap(s
  25                 device->cap._DSS = 1;
  26         }
  27
  28 -       if (acpi_video_backlight_support())
  29 -               max_level = acpi_video_init_brightness(device);
  30 +       acpi_video_support = acpi_video_backlight_support();
  31 +       if (acpi_video_support) {
  32 +               /*
  33 +                * Ugly SLE11 hack to let thinkpad_acpi handle brightness on
  34 +                * ThinkPad IGD devices
  35 +                */
  36 +               if (dmi_name_in_vendors("LENOVO") &&
  37 +                   (acpi_video_support & ACPI_VIDEO_IGD))
  38 +                       brightness_switch_enabled = 0;
  39 +               else
  40 +                       max_level = acpi_video_init_brightness(device);
  41 +       } else
  42 +                 brightness_switch_enabled = 0;
  43
  44         if (device->cap._BCL && device->cap._BCM && max_level > 0) {
  45                 int result;
  46 --- a/drivers/acpi/video_detect.c
  47 +++ b/drivers/acpi/video_detect.c
  48 @@ -217,7 +217,7 @@ int acpi_video_backlight_support(void)
  49                 return 1;
  50
  51         /* Then go the default way */
  52 -       return acpi_video_support & ACPI_VIDEO_BACKLIGHT;
  53 +       return acpi_video_support & (ACPI_VIDEO_BACKLIGHT | ACPI_VIDEO_IGD);
  54  }
  55  EXPORT_SYMBOL(acpi_video_backlight_support);
  56