From dfdaa566b7d4ecbfcabbb624bc45c5221f142039 Mon Sep 17 00:00:00 2001
From: "Lee, Shawn C" <shawn.c.lee@intel.com>
Date: Thu, 27 Sep 2018 00:48:19 -0700
Subject: [PATCH] drm/i915: Apply correct ddi translation table for AML device
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Git-commit: dfdaa566b7d4ecbfcabbb624bc45c5221f142039
Patch-mainline: v5.0-rc1
References: jsc#SLE-4986

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
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_ddi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 9e82281b4fdf..47960c92cbbf 100644
--- 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 {
-- 
2.16.4