drm/i915: blacklist Acer AspireOne lid status

It reports closed when open, leading to "no outputs found" at startup
unless a VGA cable is plugged in.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index c1cc5566e20b7427ac009dbd0c1b1d631f75f922..98ae3d73577ee473ed927065b2c0d6e540c33b36 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -591,6 +591,18 @@ static void intel_lvds_mode_set(struct drm_encoder *encoder,
        I915_WRITE(PFIT_CONTROL, lvds_priv->pfit_control);
 }
 
+/* Some lid devices report incorrect lid status, assume they're connected */
+static const struct dmi_system_id bad_lid_status[] = {
+       {
+               .ident = "Aspire One",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Aspire one"),
+               },
+       },
+       { }
+};
+
 /**
  * Detect the LVDS connection.
  *
@@ -602,7 +614,7 @@ static enum drm_connector_status intel_lvds_detect(struct drm_connector *connect
 {
        enum drm_connector_status status = connector_status_connected;
 
-       if (!acpi_lid_open())
+       if (!acpi_lid_open() && !dmi_check_system(bad_lid_status))
                status = connector_status_disconnected;
 
        return status;