drm/i915: honor forced connector modes v2

In the move over to use BIOS connector configs, we lost the ability to
force a specific set of connectors on or off.  Try to remedy that by
dropping back to the old behavior if we detect a hard coded connector
config.

v2: don't deref connector state for disabled connectors (Jesse)

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index 19be4bf..4e4b461 100644 (file)
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -291,6 +291,24 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
        bool *save_enabled;
        bool any_enabled = false;
 
+       /*
+        * If the user specified any force options, just bail here
+        * and use that config.
+        */
+       for (i = 0; i < fb_helper->connector_count; i++) {
+               struct drm_fb_helper_connector *fb_conn;
+               struct drm_connector *connector;
+
+               fb_conn = fb_helper->connector_info[i];
+               connector = fb_conn->connector;
+
+               if (!enabled[i])
+                       continue;
+
+               if (connector->force != DRM_FORCE_UNSPECIFIED)
+                       return false;
+       }
+
        save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
                               GFP_KERNEL);
        if (!save_enabled)