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drm/i915/lvds: Always use the presence pin for LVDS on PCH

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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>
This commit is contained in:
Chris Wilson
2012-02-09 09:35:53 +00:00
committed by Daniel Vetter
parent ee4f42b10b
commit f3cfcba60f
2 changed files with 17 additions and 3 deletions
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5
drivers/gpu/drm/i915/intel_display.c
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@@ -7755,10 +7755,9 @@ static void intel_setup_outputs(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_encoder *encoder;
bool dpd_is_edp = false;
bool has_lvds = false;
bool has_lvds;
if (IS_MOBILE(dev) && !IS_I830(dev))
has_lvds = intel_lvds_init(dev);
has_lvds = intel_lvds_init(dev);
if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
/* disable the panel fitter on everything but LVDS */
I915_WRITE(PFIT_CONTROL, 0);