platform/x86: asus-wmi: fix asus ux303ub brightness issue

acpi_video0 doesn't work, asus-wmi brightness interface doesn't work, too.
So, we use native brightness interface to handle the brightness adjustion,
and add quirk_asus_ux303ub.

Signed-off-by: zino lin <linzino7@gmail.com>
Acked-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

3 files changed, 17 insertions, 0 deletions

diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index adecc1c555f0..f4a60e75cd8a 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -87,6 +87,10 @@ static struct quirk_entry quirk_no_rfkill_wapf4 = {
         .no_rfkill = true,
 };
 
+static struct quirk_entry quirk_asus_ux303ub = {
+        .wmi_backlight_native = true,
+};
+
 static int dmi_matched(const struct dmi_system_id *dmi)
 {
         quirks = dmi->driver_data;
@@ -351,6 +355,15 @@ static const struct dmi_system_id asus_quirks[] = {
                 },
                 .driver_data = &quirk_no_rfkill,
         },
+        {
+                .callback = dmi_matched,
+                .ident = "ASUSTeK COMPUTER INC. UX303UB",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "UX303UB"),
+                },
+                .driver_data = &quirk_asus_ux303ub,
+        },
         {},
 };
 
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 7c093a0b78bb..ce6ca31a2d09 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -2084,6 +2084,9 @@ static int asus_wmi_add(struct platform_device *pdev)
         if (asus->driver->quirks->wmi_backlight_power)
                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
 
+        if (asus->driver->quirks->wmi_backlight_native)
+                acpi_video_set_dmi_backlight_type(acpi_backlight_native);
+
         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
                 err = asus_wmi_backlight_init(asus);
                 if (err && err != -ENODEV)
diff --git a/drivers/platform/x86/asus-wmi.h b/drivers/platform/x86/asus-wmi.h
index 5de1df510ebd..5e220411056d 100644
--- a/drivers/platform/x86/asus-wmi.h
+++ b/drivers/platform/x86/asus-wmi.h
@@ -43,6 +43,7 @@ struct quirk_entry {
         bool scalar_panel_brightness;
         bool store_backlight_power;
         bool wmi_backlight_power;
+        bool wmi_backlight_native;
         int wapf;
         /*
          * For machines with AMD graphic chips, it will send out WMI event