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authorChris Wilson <chris@chris-wilson.co.uk>2012-02-09 09:35:53 +0000
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-02-15 16:41:34 +0100
commitf3cfcba60fcfdce89f9332dc6c31137309d33c8a (patch)
treecbf52b14b009ef352761fdd38c22f14c2d577a7d /drivers/gpu/drm/i915/intel_lvds.c
parentee4f42b10bbc404579c2e6f446b24d898592753c (diff)
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drm/i915/lvds: Always use the presence pin for LVDS on PCH
With the introduction of the PCH, we gained an LVDS presence pin but we continued to use the existing logic that asserted that LVDS was only supported on certain mobile chipsets. However, there are desktop IronLake systems with LVDS attached which we fail to detect. So for PCH, trust the LVDS presence pin and quirk all the lying manufacturers. Tested-by: Daniel Woff <wolff.daniel@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=43171 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lvds.c')
-rw-r--r--drivers/gpu/drm/i915/intel_lvds.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index aa84832b0e1..b103c3b2bfe 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -844,6 +844,18 @@ static bool lvds_is_present_in_vbt(struct drm_device *dev,
return false;
}
+static bool intel_lvds_supported(struct drm_device *dev)
+{
+ /* With the introduction of the PCH we gained a dedicated
+ * LVDS presence pin, use it. */
+ if (HAS_PCH_SPLIT(dev))
+ return true;
+
+ /* Otherwise LVDS was only attached to mobile products,
+ * except for the inglorious 830gm */
+ return IS_MOBILE(dev) && !IS_I830(dev);
+}
+
/**
* intel_lvds_init - setup LVDS connectors on this device
* @dev: drm device
@@ -865,6 +877,9 @@ bool intel_lvds_init(struct drm_device *dev)
int pipe;
u8 pin;
+ if (!intel_lvds_supported(dev))
+ return false;
+
/* Skip init on machines we know falsely report LVDS */
if (dmi_check_system(intel_no_lvds))
return false;