drm/i915: slow acpi_lid_open() causes flickering - V2

acpi_lid_open() could take up to 10ms on my computer.  Some component is
calling the drm GETCONNECTOR ioctl many times in a row.  This results in
flickering (for example, when starting a video).  Fix it by assuming an
always connected lid status.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 75a9772061cb..b1d0acbae4e4 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -623,6 +623,13 @@ static const struct dmi_system_id bad_lid_status[] = {
                 },
         },
         {
+                .ident = "Aspire 1810T",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1810T"),
+                },
+        },
+        {
                 .ident = "PC-81005",
                 .matches = {
                         DMI_MATCH(DMI_SYS_VENDOR, "MALATA"),
@@ -643,7 +650,7 @@ static enum drm_connector_status intel_lvds_detect(struct drm_connector *connect
 {
         enum drm_connector_status status = connector_status_connected;
 
-        if (!acpi_lid_open() && !dmi_check_system(bad_lid_status))
+        if (!dmi_check_system(bad_lid_status) && !acpi_lid_open())
                 status = connector_status_disconnected;
 
         return status;