drm/i915: Allocate connector state together with the connectors
Connector states were being allocated in intel_setup_outputs() in loop
over all connectors. That meant hot-added connectors would have a NULL
state. Since the change to use a struct drm_atomic_state for the legacy
modeset, connector states are necessary for the i915 driver to function
properly, so that would lead to oopses.
Broken by
commit 944b0c76575753da5a332aab0a1d8c6df65a076b
Author: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Date: Fri Mar 20 16:18:07 2015 +0200
drm/i915: Copy the staged connector config to the legacy atomic state
v2: Fix test for intel_connector_init() success in lvds and sdvo (PRTS)
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reported-and-tested-by: Nicolas Kalkhof <nkalkhof@web.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 75955fe..5b32b68 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5636,6 +5636,34 @@
}
}
+int intel_connector_init(struct intel_connector *connector)
+{
+ struct drm_connector_state *connector_state;
+
+ connector_state = kzalloc(sizeof *connector_state, GFP_KERNEL);
+ if (!connector_state)
+ return -ENOMEM;
+
+ connector->base.state = connector_state;
+ return 0;
+}
+
+struct intel_connector *intel_connector_alloc(void)
+{
+ struct intel_connector *connector;
+
+ connector = kzalloc(sizeof *connector, GFP_KERNEL);
+ if (!connector)
+ return NULL;
+
+ if (intel_connector_init(connector) < 0) {
+ kfree(connector);
+ return NULL;
+ }
+
+ return connector;
+}
+
/* Even simpler default implementation, if there's really no special case to
* consider. */
void intel_connector_dpms(struct drm_connector *connector, int mode)
@@ -13003,7 +13031,6 @@
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_encoder *encoder;
- struct drm_connector *connector;
bool dpd_is_edp = false;
intel_lvds_init(dev);
@@ -13139,39 +13166,6 @@
if (SUPPORTS_TV(dev))
intel_tv_init(dev);
- /*
- * FIXME: We don't have full atomic support yet, but we want to be
- * able to enable/test plane updates via the atomic interface in the
- * meantime. However as soon as we flip DRIVER_ATOMIC on, the DRM core
- * will take some atomic codepaths to lookup properties during
- * drmModeGetConnector() that unconditionally dereference
- * connector->state.
- *
- * We create a dummy connector state here for each connector to ensure
- * the DRM core doesn't try to dereference a NULL connector->state.
- * The actual connector properties will never be updated or contain
- * useful information, but since we're doing this specifically for
- * testing/debug of the plane operations (and only when a specific
- * kernel module option is given), that shouldn't really matter.
- *
- * We are also relying on these states to convert the legacy mode set
- * to use a drm_atomic_state struct. The states are kept consistent
- * with actual state, so that it is safe to rely on that instead of
- * the staged config.
- *
- * Once atomic support for crtc's + connectors lands, this loop should
- * be removed since we'll be setting up real connector state, which
- * will contain Intel-specific properties.
- */
- list_for_each_entry(connector,
- &dev->mode_config.connector_list,
- head) {
- if (!WARN_ON(connector->state)) {
- connector->state = kzalloc(sizeof(*connector->state),
- GFP_KERNEL);
- }
- }
-
intel_psr_init(dev);
for_each_intel_encoder(dev, encoder) {