drm/i915: Expect child dev size of 22 bytes for VBT < 106

My 830 has VBT version 105 with child device size of 22 bytes.
Let's assume that's correct and adjust our expectations.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450110229-30450-9-git-send-email-ville.syrjala@linux.intel.com
Acked-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 1de16f2..12e2f8b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1157,7 +1157,9 @@ parse_device_mapping(struct drm_i915_private *dev_priv,
                DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
                return;
        }
-       if (bdb->version < 109) {
+       if (bdb->version < 106) {
+               expected_size = 22;
+       } else if (bdb->version < 109) {
                expected_size = 27;
        } else if (bdb->version < 195) {
                BUILD_BUG_ON(sizeof(struct old_child_dev_config) != 33);