gpu/drm/i915: Add a blacklist to omit modeset on LID open
On some machines (currently only the Toshiba Tecra A11 is known), the GPU
locks up when modeset is forced on LID open. This patch adds a new DMI
blacklist and omits modesetting for all matches.
Fixes https://bugzilla.kernel.org/show_bug.cgi?id=15550
Signed-off-by: Thomas Bächler <thomas@archlinux.org>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 31df55f..0eab8df 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -599,6 +599,26 @@
return 0;
}
+static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
+{
+ DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id->ident);
+ return 1;
+}
+
+/* The GPU hangs up on these systems if modeset is performed on LID open */
+static const struct dmi_system_id intel_no_modeset_on_lid[] = {
+ {
+ .callback = intel_no_modeset_on_lid_dmi_callback,
+ .ident = "Toshiba Tecra A11",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
+ },
+ },
+
+ { } /* terminating entry */
+};
+
/*
* Lid events. Note the use of 'modeset_on_lid':
* - we set it on lid close, and reset it on open
@@ -622,6 +642,9 @@
*/
if (connector)
connector->status = connector->funcs->detect(connector);
+ /* Don't force modeset on machines where it causes a GPU lockup */
+ if (dmi_check_system(intel_no_modeset_on_lid))
+ return NOTIFY_OK;
if (!acpi_lid_open()) {
dev_priv->modeset_on_lid = 1;
return NOTIFY_OK;