Change the type for the registered backlight class device from platform to raw/native. The poulsbo/cedarview/oaktrail backlight support is using native GPU backlight control and as such the type should be raw (aka native) as is done by all the other native GPU backlight driver code. Note this will not change much from userspace's point of view. poulsbo/cedarview laptops typically offer both an ACPI-video backlight interface as well as the native GPU backlight interface. The /sys/class/backlight/acpi_video0 has a type of firmware and userspace typically looks for firmware devices before looking for platform devices. The typical standard lookup order is: firmware -> platform -> raw This means that both before and after this change typical userspace backlight consumers (sich as e.g. GNOME) will prefer the firmware acpi_video0 backlight device. This has been tested on a Packard Bell Dot SC (Intel Atom N2600, cedarview) and a Sony Vaio vpc-x11s1e (Intel N540, poulsbo) laptop. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- drivers/gpu/drm/gma500/backlight.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/gma500/backlight.c b/drivers/gpu/drm/gma500/backlight.c index 20c793de7775..d113c5810ca5 100644 --- a/drivers/gpu/drm/gma500/backlight.c +++ b/drivers/gpu/drm/gma500/backlight.c @@ -83,7 +83,7 @@ int gma_backlight_init(struct drm_device *dev) #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE props.brightness = dev_priv->backlight_level; props.max_brightness = PSB_MAX_BRIGHTNESS; - props.type = BACKLIGHT_PLATFORM; + props.type = BACKLIGHT_RAW; dev_priv->backlight_device = backlight_device_register(dev_priv->ops->backlight_name, -- 2.37.2
