drm/i915: Apply correct ddi translation table for AML device

Amber Lake used the same gen graphics as Kaby Lake. Kernel driver
should configure KBL's DDI buffer setting for AML ULX as well.

So far, driver would load DDI translation table that used for
KBL H/S platform and apply it on AML devices. But AML is belong to
ULX series. This change will lead driver to apply KBL-Y's DDI table
for AML devices to avoid unexpected eDP/DP signal quality issue.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jose Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Lee, Shawn C <shawn.c.lee@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1538034499-31256-2-git-send-email-shawn.c.lee@intel.com

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 9e82281..47960c9 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -642,7 +642,7 @@ skl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
 static const struct ddi_buf_trans *
 kbl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
 {
-       if (IS_KBL_ULX(dev_priv)) {
+       if (IS_KBL_ULX(dev_priv) || IS_AML_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(kbl_y_ddi_translations_dp);
                return kbl_y_ddi_translations_dp;
        } else if (IS_KBL_ULT(dev_priv) || IS_CFL_ULT(dev_priv)) {
@@ -658,7 +658,7 @@ static const struct ddi_buf_trans *
 skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
 {
        if (dev_priv->vbt.edp.low_vswing) {
-               if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
+               if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv) || IS_AML_ULX(dev_priv)) {
                        *n_entries = ARRAY_SIZE(skl_y_ddi_translations_edp);
                        return skl_y_ddi_translations_edp;
                } else if (IS_SKL_ULT(dev_priv) || IS_KBL_ULT(dev_priv) ||
@@ -680,7 +680,7 @@ skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
 static const struct ddi_buf_trans *
 skl_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
 {
-       if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
+       if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv) || IS_AML_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(skl_y_ddi_translations_hdmi);
                return skl_y_ddi_translations_hdmi;
        } else {