Lines Matching refs:backlight
16 #include <linux/backlight.h>
85 static struct backlight_device *backlight;
137 /* Instance 1 is "get backlight", cmp with DSDT */
140 pr_err("Could not query backlight: %d\n", err);
146 pr_debug("Current backlight level: 0x%X - index: %d\n",
164 /* Instance 0 is "set backlight" */
214 (backlight ||
237 backlight = backlight_device_register(DRV_NAME, NULL, NULL,
240 if (IS_ERR(backlight))
241 return PTR_ERR(backlight);
245 backlight_device_unregister(backlight);
249 backlight->props.brightness = err;
315 pr_err("Unable to setup backlight device\n");
321 if (!event_wmi && !backlight) {
322 pr_err("This machine doesn't have neither MSI-hotkeys nor backlight through WMI\n");
343 backlight_device_unregister(backlight);