diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 75b7ca1488e..b461f90698e 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12439,6 +12439,7 @@ static void intel_setup_outputs(struct drm_device *dev) { 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); @@ -12569,6 +12570,37 @@ static void intel_setup_outputs(struct drm_device *dev) 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. + * + * 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. + */ + if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { + 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) { |