[PATCH 1/1] alienware-wmi: make hdmi_mux enabled on case-by-case basis

[Mario Limonciello]

Not all HW supporting WMAX method will support the HDMI mux feature.
Explicitly quirk the HW that does support it.

Signed-off-by: Mario Limonciello <mario_limoncie...@dell.com>
---
 drivers/platform/x86/alienware-wmi.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/alienware-wmi.c 
b/drivers/platform/x86/alienware-wmi.c
index 297b664..7b1fe5f 100644
--- a/drivers/platform/x86/alienware-wmi.c
+++ b/drivers/platform/x86/alienware-wmi.c
@@ -59,16 +59,24 @@ enum WMAX_CONTROL_STATES {
 
 struct quirk_entry {
        u8 num_zones;
+       u8 hdmi_mux;
 };
 
 static struct quirk_entry *quirks;
 
 static struct quirk_entry quirk_unknown = {
        .num_zones = 2,
+       .hdmi_mux = 0,
 };
 
 static struct quirk_entry quirk_x51_family = {
        .num_zones = 3,
+       .hdmi_mux = 0,
+};
+
+static struct quirk_entry quirk_asm100 = {
+       .num_zones = 2,
+       .hdmi_mux = 1,
 };
 
 static int dmi_matched(const struct dmi_system_id *dmi)
@@ -96,6 +104,15 @@ static struct dmi_system_id alienware_quirks[] = {
                     },
         .driver_data = &quirk_x51_family,
         },
+       {
+        .callback = dmi_matched,
+        .ident = "Alienware ASM100",
+        .matches = {
+                    DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
+                    DMI_MATCH(DMI_PRODUCT_NAME, "ASM100"),
+                    },
+        .driver_data = &quirk_asm100,
+        },
        {}
 };
 
@@ -537,7 +554,8 @@ static struct attribute_group hdmi_attribute_group = {
 
 static void remove_hdmi(struct platform_device *dev)
 {
-       sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
+       if (quirks->hdmi_mux > 0)
+               sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
 }
 
 static int create_hdmi(struct platform_device *dev)
@@ -583,7 +601,7 @@ static int __init alienware_wmi_init(void)
        if (ret)
                goto fail_platform_device2;
 
-       if (interface == WMAX) {
+       if (quirks->hdmi_mux > 0) {
                ret = create_hdmi(platform_device);
                if (ret)
                        goto fail_prep_hdmi;
-- 
1.9.1

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