drm/i915: Add a module parameter to ignore lid status

Seems like we are forever to be cursed with buggy firmware, so allow the
user to explicitly set the panel connection status.

Of secondary utility for cases where I run laptops with the lid closed,
but still want to configure the LVDS.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 286995a9a84a..784660a3667b 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -287,6 +287,11 @@ intel_panel_detect(struct drm_device *dev)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
 
+        if (i915_panel_ignore_lid)
+                return i915_panel_ignore_lid > 0 ?
+                        connector_status_connected :
+                        connector_status_disconnected;
+
         /* Assume that the BIOS does not lie through the OpRegion... */
         if (dev_priv->opregion.lid_state)
                 return ioread32(dev_priv->opregion.lid_state) & 0x1 ?