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path: root/drivers/gpu/drm/i915/intel_lvds.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_lvds.c')
-rw-r--r--drivers/gpu/drm/i915/intel_lvds.c53
1 files changed, 1 insertions, 52 deletions
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index cbd1b0d547ee..766ba566fef1 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -775,57 +775,6 @@ static const struct dmi_system_id intel_no_lvds[] = {
{ } /* terminating entry */
};
-/*
- * Enumerate the child dev array parsed from VBT to check whether
- * the LVDS 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 LVDS is present.
- */
-static bool lvds_is_present_in_vbt(struct drm_device *dev,
- u8 *i2c_pin)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
- int i;
-
- if (!dev_priv->vbt.child_dev_num)
- return true;
-
- for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
- union child_device_config *uchild = dev_priv->vbt.child_dev + i;
- struct old_child_dev_config *child = &uchild->old;
-
- /* If the device type is not LFP, continue.
- * We have to check both the new identifiers as well as the
- * old for compatibility with some BIOSes.
- */
- if (child->device_type != DEVICE_TYPE_INT_LFP &&
- child->device_type != DEVICE_TYPE_LFP)
- continue;
-
- if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
- *i2c_pin = child->i2c_pin;
-
- /* However, we cannot trust the BIOS writers to populate
- * the VBT correctly. Since LVDS requires additional
- * information from AIM blocks, a non-zero addin offset is
- * a good indicator that the LVDS is actually present.
- */
- if (child->addin_offset)
- return true;
-
- /* But even then some BIOS writers perform some black magic
- * and instantiate the device without reference to any
- * additional data. Trust that if the VBT was written into
- * the OpRegion then they have validated the LVDS's existence.
- */
- if (dev_priv->opregion.vbt)
- return true;
- }
-
- return false;
-}
-
static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
{
DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
@@ -982,7 +931,7 @@ void intel_lvds_init(struct drm_device *dev)
}
pin = GMBUS_PIN_PANEL;
- if (!lvds_is_present_in_vbt(dev, &pin)) {
+ if (!intel_bios_is_lvds_present(dev_priv, &pin)) {
if ((lvds & LVDS_PORT_EN) == 0) {
DRM_DEBUG_KMS("LVDS is not present in VBT\n");
return;
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