asus-wmi: Port to new backlight interface selection API

Port the backlight selection logic to the new backlight interface
selection API.

This commit also removes various obsolete pr_xxx messages related to
backlight interface selection. These are obsolete because they assume
there is only a vendor or acpi backlight driver and no other choice.
Also they are not necessary, if the user wants to know which backlight
interfaces are registered a simple "ls /sys/class/backlight" suffices.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 945145df67b8a44a704b0aab98daf0f352a597fa..6f8558f744a4e275df3ffda283c2b97d3232efd5 100644 (file)
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1364,7 +1364,7 @@ static void asus_wmi_notify(u32 value, void *context)
                code = ASUS_WMI_BRN_DOWN;
 
        if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
-               if (!acpi_video_backlight_support()) {
+               if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
                        asus_wmi_backlight_notify(asus, orig_code);
                        goto exit;
                }
@@ -1772,17 +1772,16 @@ static int asus_wmi_add(struct platform_device *pdev)
           stop this from showing up */
        chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
        if (chassis_type && !strcmp(chassis_type, "3"))
-               acpi_video_dmi_promote_vendor();
+               acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
+
        if (asus->driver->quirks->wmi_backlight_power)
-               acpi_video_dmi_promote_vendor();
-       if (!acpi_video_backlight_support()) {
-               pr_info("Disabling ACPI video driver\n");
-               acpi_video_unregister_backlight();
+               acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
+
+       if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
                err = asus_wmi_backlight_init(asus);
                if (err && err != -ENODEV)
                        goto fail_backlight;
-       } else
-               pr_info("Backlight controlled by ACPI video driver\n");
+       }
 
        status = wmi_install_notify_handler(asus->driver->event_guid,
                                            asus_wmi_notify, asus);