From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Mon, 14 Dec 2015 16:23:47 +0000 (+0200)
Subject: drm/i915: Expect child dev size of 22 bytes for VBT < 106
X-Git-Tag: v4.14-rc1~2738^2~45^2~829
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7244f309b0fc6508ec585e723ae92057f5bd5855;p=platform%2Fkernel%2Flinux-rpi.git

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
--- 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);