diff options
Diffstat (limited to 'drivers/platform/x86/toshiba_acpi.c')
| -rw-r--r-- | drivers/platform/x86/toshiba_acpi.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c index f624dd56051f..9956b9902bb4 100644 --- a/drivers/platform/x86/toshiba_acpi.c +++ b/drivers/platform/x86/toshiba_acpi.c @@ -49,7 +49,9 @@ #include <linux/workqueue.h> #include <linux/i8042.h> #include <linux/acpi.h> +#include <linux/dmi.h> #include <linux/uaccess.h> +#include <acpi/video.h> MODULE_AUTHOR("John Belmonte"); MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); @@ -264,6 +266,14 @@ static const struct key_entry toshiba_acpi_alt_keymap[] = { }; /* + * List of models which have a broken acpi-video backlight interface and thus + * need to use the toshiba (vendor) interface instead. + */ +static const struct dmi_system_id toshiba_vendor_backlight_dmi[] = { + {} +}; + +/* * Utility */ @@ -2624,6 +2634,20 @@ static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev) ret = get_tr_backlight_status(dev, &enabled); dev->tr_backlight_supported = !ret; + /* + * Tell acpi-video-detect code to prefer vendor backlight on all + * systems with transflective backlight and on dmi matched systems. + */ + if (dev->tr_backlight_supported || + dmi_check_system(toshiba_vendor_backlight_dmi)) + acpi_video_dmi_promote_vendor(); + + if (acpi_video_backlight_support()) + return 0; + + /* acpi-video may have loaded before we called dmi_promote_vendor() */ + acpi_video_unregister_backlight(); + memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_PLATFORM; props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1; |