diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 28 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lvds.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_vbt_defs.h | 2 |
3 files changed, 30 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index ea7ae8bc0ea0..1cf073b6ac8a 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -516,9 +516,31 @@ parse_driver_features(struct drm_i915_private *dev_priv, if (!driver) return; - if (INTEL_GEN(dev_priv) >= 5 && - driver->lvds_config == BDB_DRIVER_FEATURE_EDP) - dev_priv->vbt.int_lvds_support = 0; + if (INTEL_GEN(dev_priv) >= 5) { + /* + * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS + * to mean "eDP". The VBT spec doesn't agree with that + * interpretation, but real world VBTs seem to. + */ + if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS) + dev_priv->vbt.int_lvds_support = 0; + } else { + /* + * FIXME it's not clear which BDB version has the LVDS config + * bits defined. Revision history in the VBT spec says: + * "0.92 | Add two definitions for VBT value of LVDS Active + * Config (00b and 11b values defined) | 06/13/2005" + * but does not the specify the BDB version. + * + * So far version 134 (on i945gm) is the oldest VBT observed + * in the wild with the bits correctly populated. Version + * 108 (on i85x) does not have the bits correctly populated. + */ + if (bdb->version >= 134 && + driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS && + driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS) + dev_priv->vbt.int_lvds_support = 0; + } DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled); /* diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index bacad88ad7ae..e05c12e7629c 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -1000,8 +1000,11 @@ void intel_lvds_init(struct drm_i915_private *dev_priv) return; /* Skip init on machines we know falsely report LVDS */ - if (dmi_check_system(intel_no_lvds)) + if (dmi_check_system(intel_no_lvds)) { + WARN(!dev_priv->vbt.int_lvds_support, + "Useless DMI match. Internal LVDS support disabled by VBT\n"); return; + } if (!dev_priv->vbt.int_lvds_support) { DRM_DEBUG_KMS("Internal LVDS support disabled by VBT\n"); diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h b/drivers/gpu/drm/i915/intel_vbt_defs.h index 458468237b5f..39c804624179 100644 --- a/drivers/gpu/drm/i915/intel_vbt_defs.h +++ b/drivers/gpu/drm/i915/intel_vbt_defs.h @@ -635,7 +635,7 @@ struct bdb_sdvo_lvds_options { #define BDB_DRIVER_FEATURE_NO_LVDS 0 #define BDB_DRIVER_FEATURE_INT_LVDS 1 #define BDB_DRIVER_FEATURE_SDVO_LVDS 2 -#define BDB_DRIVER_FEATURE_EDP 3 +#define BDB_DRIVER_FEATURE_INT_SDVO_LVDS 3 struct bdb_driver_features { u8 boot_dev_algorithm:1; |