From: Paul Collins <paul@burly.ondioline.org>
Date: Wed, 4 Feb 2009 10:05:41 +0000 (+1300)
Subject: drm/i915: skip LVDS initialization on Apple Mac Mini
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=565dcd4635f4f8c0ac4dee38a5625bc325799b1e;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

drm/i915: skip LVDS initialization on Apple Mac Mini

The Apple Mac Mini falsely reports LVDS.  Use DMI to check whether we
are running on a Mac Mini, and skip LVDS initialization if that proves
to be the case.

Signed-off-by: Paul Collins <paul@ondioline.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
---

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index cf8da644faf2..6d4f91265354 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -27,6 +27,7 @@
  *      Jesse Barnes <jesse.barnes@intel.com>
  */
 
+#include <linux/dmi.h>
 #include <linux/i2c.h>
 #include "drmP.h"
 #include "drm.h"
@@ -403,6 +404,16 @@ void intel_lvds_init(struct drm_device *dev)
 	u32 lvds;
 	int pipe;
 
+	/* Blacklist machines that we know falsely report LVDS. */
+	/* FIXME: add a check for the Aopen Mini PC */
+
+	/* Apple Mac Mini Core Duo and Mac Mini Core 2 Duo */
+	if(dmi_match(DMI_PRODUCT_NAME, "Macmini1,1") ||
+	   dmi_match(DMI_PRODUCT_NAME, "Macmini2,1")) {
+		DRM_DEBUG("Skipping LVDS initialization for Apple Mac Mini\n");
+		return;
+	}
+
 	intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
 	if (!intel_output) {
 		return;
@@ -456,7 +467,7 @@ void intel_lvds_init(struct drm_device *dev)
 			dev_priv->panel_fixed_mode =
 				drm_mode_duplicate(dev, scan);
 			mutex_unlock(&dev->mode_config.mutex);
-			goto out; /* FIXME: check for quirks */
+			goto out;
 		}
 		mutex_unlock(&dev->mode_config.mutex);
 	}
@@ -490,7 +501,7 @@ void intel_lvds_init(struct drm_device *dev)
 		if (dev_priv->panel_fixed_mode) {
 			dev_priv->panel_fixed_mode->type |=
 				DRM_MODE_TYPE_PREFERRED;
-			goto out; /* FIXME: check for quirks */
+			goto out;
 		}
 	}
 
@@ -498,38 +509,6 @@ void intel_lvds_init(struct drm_device *dev)
 	if (!dev_priv->panel_fixed_mode)
 		goto failed;
 
-	/* FIXME: detect aopen & mac mini type stuff automatically? */
-	/*
-	 * Blacklist machines with BIOSes that list an LVDS panel without
-	 * actually having one.
-	 */
-	if (IS_I945GM(dev)) {
-		/* aopen mini pc */
-		if (dev->pdev->subsystem_vendor == 0xa0a0)
-			goto failed;
-
-		if ((dev->pdev->subsystem_vendor == 0x8086) &&
-		    (dev->pdev->subsystem_device == 0x7270)) {
-			/* It's a Mac Mini or Macbook Pro.
-			 *
-			 * Apple hardware is out to get us.  The macbook pro
-			 * has a real LVDS panel, but the mac mini does not,
-			 * and they have the same device IDs.  We'll
-			 * distinguish by panel size, on the assumption
-			 * that Apple isn't about to make any machines with an
-			 * 800x600 display.
-			 */
-
-			if (dev_priv->panel_fixed_mode != NULL &&
-			    dev_priv->panel_fixed_mode->hdisplay == 800 &&
-			    dev_priv->panel_fixed_mode->vdisplay == 600) {
-				DRM_DEBUG("Suspected Mac Mini, ignoring the LVDS\n");
-				goto failed;
-			}
-		}
-	}
-
-
 out:
 	drm_sysfs_connector_add(connector);
 	return;