From 2413306c2566b729a9d17a81e9d1181e6f354d6a Mon Sep 17 00:00:00 2001
From: Lukas Wunner <lukas@wunner.de>
Date: Mon, 11 Jan 2016 20:09:20 +0100
Subject: apple-gmux: Add helper for presence detect

Centralize gmux' ACPI HID in a header file and add apple_gmux_present().
This can be used by other drivers to activate quirks specific to dual
GPU MacBook Pros & Mac Pros. The alternative would be to hardcode DMI
or PCI IDs and amend them whenever Apple introduces a new machine.

Tested-by: Lukas Wunner <lukas@wunner.de>
    [MBP  9,1 2012  intel IVB + nvidia GK107  pre-retina  15"]
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/89c23769058a340e5e11d4a7102f3793d3b0c94c.1452525860.git.lukas@wunner.de
---
 Documentation/DocBook/gpu.tmpl | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'Documentation/DocBook')

diff --git a/Documentation/DocBook/gpu.tmpl b/Documentation/DocBook/gpu.tmpl
index d6579d8c1341..fe6b36a2fd98 100644
--- a/Documentation/DocBook/gpu.tmpl
+++ b/Documentation/DocBook/gpu.tmpl
@@ -3451,6 +3451,10 @@ int num_ioctls;</synopsis>
         <title>Backlight control</title>
 !Pdrivers/platform/x86/apple-gmux.c Backlight control
       </sect2>
+      <sect2>
+        <title>Public functions</title>
+!Iinclude/linux/apple-gmux.h
+      </sect2>
     </sect1>
   </chapter>
 
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