Commit 21245df3 authored by Hans de Goede's avatar Hans de Goede
Browse files

ACPI: video: Add Apple GMUX brightness control detection 



On Apple laptops with an Apple GMUX using this for brightness control,
should take precedence of any other brightness control methods.

Add apple-gmux detection to acpi_video_get_backlight_type() using
the already existing apple_gmux_present() helper function.

This will allow removig the (ab)use of:

	acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);

Inside the apple-gmux driver.

Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent fe7aebb4

drivers/acpi/video_detect.c

+4 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 


#include <linux/export.h>

#include <linux/acpi.h>

#include <linux/apple-gmux.h>

#include <linux/backlight.h>

#include <linux/dmi.h>

#include <linux/module.h>
@@ -607,6 +608,9 @@ static enum acpi_backlight_type __acpi_video_get_backlight_type(bool native) 
	if (nvidia_wmi_ec_present)

		return acpi_backlight_nvidia_wmi_ec;



	if (apple_gmux_present())

		return acpi_backlight_apple_gmux;



	/* On systems with ACPI video use either native or ACPI video. */

	if (video_caps & ACPI_VIDEO_BACKLIGHT) {

		/*

include/acpi/video.h

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ enum acpi_backlight_type { 
	acpi_backlight_vendor,

	acpi_backlight_native,

	acpi_backlight_nvidia_wmi_ec,

	acpi_backlight_apple_gmux,

};



#if IS_ENABLED(CONFIG_ACPI_VIDEO)