diff options
Diffstat (limited to 'drivers/acpi/video_detect.c')
| -rw-r--r-- | drivers/acpi/video_detect.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 0d9064a9804c..9cd8797d12bb 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -668,6 +668,11 @@ static const struct dmi_system_id video_detect_dmi_table[] = { { }, }; +static bool google_cros_ec_present(void) +{ + return acpi_dev_found("GOOG0004"); +} + /* * Determine which type of backlight interface to use on this system, * First check cmdline, then dmi quirks, then do autodetect. @@ -730,6 +735,13 @@ static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native) return acpi_backlight_video; } + /* + * Chromebooks that don't have backlight handle in ACPI table + * are supposed to use native backlight if it's available. + */ + if (google_cros_ec_present() && native_available) + return acpi_backlight_native; + /* No ACPI video (old hw), use vendor specific fw methods. */ return acpi_backlight_vendor; } |