drm/i915: Cache LVDS EDID

We assume that the panel is permenantly connected and that the EDID data
is consistent from boot, so simply cache the whole EDID for the panel.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index f6a72cbb152d614ed771cb65e67486eade9432d2..5666e89288d38ac751be6bfbcc9d7eb4836a715a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -44,7 +44,7 @@
 struct intel_lvds {
        struct intel_encoder base;
 
-       bool edid_good;
+       struct edid *edid;
 
        int fitting_mode;
        u32 pfit_control;
@@ -475,14 +475,12 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
 {
        struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
        struct drm_device *dev = connector->dev;
-       struct drm_i915_private *dev_priv = dev->dev_private;
        struct drm_display_mode *mode;
 
-       if (intel_lvds->edid_good) {
-               int ret = intel_ddc_get_modes(connector,
-                                             &dev_priv->gmbus[GMBUS_PORT_PANEL].adapter);
-               if (ret)
-                       return ret;
+       if (intel_lvds->edid) {
+               drm_mode_connector_update_edid_property(connector,
+                                                       intel_lvds->edid);
+               return drm_add_edid_modes(connector, intel_lvds->edid);
        }
 
        mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode);
@@ -906,11 +904,10 @@ void intel_lvds_init(struct drm_device *dev)
         * Attempt to get the fixed panel mode from DDC.  Assume that the
         * preferred mode is the right one.
         */
-       intel_lvds->edid_good = true;
-       if (!intel_ddc_get_modes(connector, &dev_priv->gmbus[GMBUS_PORT_PANEL].adapter))
-               intel_lvds->edid_good = false;
+       intel_lvds->edid = drm_get_edid(connector,
+                                       &dev_priv->gmbus[GMBUS_PORT_PANEL].adapter);
 
-       if (!intel_lvds->edid_good) {
+       if (!intel_lvds->edid) {
                /* Didn't get an EDID, so
                 * Set wide sync ranges so we get all modes
                 * handed to valid_mode for checking