drm/i915: Don't use the child device parsed from VBT to setup HDMI/DP

On some boxes the BIOS will report different child device arrays when
the system is booted with/without the dock. In such case the HDMI/DP
port can't be setup correctly.  So revert two commits
(fc816655236cd9da162356e96e74c7cfb0834d92/
6e36595a2131e7ed5ee2674be54b2713ba7f0490) that use the child device
parsed from VBT to setup HDMI/DP.

http://bugzilla.kernel.org/show_bug.cgi?id=14854
http://bugzilla.kernel.org/show_bug.cgi?id=14860

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Tested-by: Sean Young <sean@mess.org>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 0 insertions, 50 deletions

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 06431941b233..0e268deed761 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -225,52 +225,6 @@ static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 	.destroy = intel_hdmi_enc_destroy,
 };
 
-/*
- * Enumerate the child dev array parsed from VBT to check whether
- * the given HDMI is present.
- * If it is present, return 1.
- * If it is not present, return false.
- * If no child dev is parsed from VBT, it assumes that the given
- * HDMI is present.
- */
-static int hdmi_is_present_in_vbt(struct drm_device *dev, int hdmi_reg)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct child_device_config *p_child;
-	int i, hdmi_port, ret;
-
-	if (!dev_priv->child_dev_num)
-		return 1;
-
-	if (hdmi_reg == SDVOB)
-		hdmi_port = DVO_B;
-	else if (hdmi_reg == SDVOC)
-		hdmi_port = DVO_C;
-	else if (hdmi_reg == HDMIB)
-		hdmi_port = DVO_B;
-	else if (hdmi_reg == HDMIC)
-		hdmi_port = DVO_C;
-	else if (hdmi_reg == HDMID)
-		hdmi_port = DVO_D;
-	else
-		return 0;
-
-	ret = 0;
-	for (i = 0; i < dev_priv->child_dev_num; i++) {
-		p_child = dev_priv->child_dev + i;
-		/*
-		 * If the device type is not HDMI, continue.
-		 */
-		if (p_child->device_type != DEVICE_TYPE_HDMI)
-			continue;
-		/* Find the HDMI port */
-		if (p_child->dvo_port == hdmi_port) {
-			ret = 1;
-			break;
-		}
-	}
-	return ret;
-}
 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -278,10 +232,6 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 	struct intel_output *intel_output;
 	struct intel_hdmi_priv *hdmi_priv;
 
-	if (!hdmi_is_present_in_vbt(dev, sdvox_reg)) {
-		DRM_DEBUG_KMS("HDMI is not present. Ignored it \n");
-		return;
-	}
 	intel_output = kcalloc(sizeof(struct intel_output) +
 			       sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
 	if (!intel_output)