[Intel-gfx] [PATCH 08/15] drm/i915: Reject >9 ddi translation entried if port != A/E on SKL

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Only DDI A and E support 10 translation entries in DP mode. For the
other ports the tenth entry is reserved for HDMI..

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 838cbbe33517..152c813cc43e 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -443,6 +443,10 @@ static void intel_prepare_ddi_buffers(struct drm_i915_private *dev_priv,
 		if (dev_priv->vbt.ddi_port_info[port].hdmi_boost_level ||
 		    dev_priv->vbt.ddi_port_info[port].dp_boost_level)
 			iboost_bit = 1<<31;
+
+		if (WARN_ON(port != PORT_A &&
+			    port != PORT_E && n_edp_entries > 9))
+			n_edp_entries = 9;
 	} else if (IS_BROADWELL(dev_priv)) {
 		BUILD_BUG_ON(ARRAY_SIZE(bdw_ddi_translations_fdi) != 9);
 		BUILD_BUG_ON(ARRAY_SIZE(bdw_ddi_translations_dp) != 9);
@@ -2099,6 +2103,11 @@ static void skl_ddi_set_iboost(struct drm_i915_private *dev_priv,
 			iboost = dp_iboost;
 		} else {
 			ddi_translations = skl_get_buf_trans_edp(dev_priv, &n_entries);
+
+			if (WARN_ON(port != PORT_A &&
+				    port != PORT_E && n_entries > 9))
+				n_entries = 9;
+
 			iboost = ddi_translations[level].i_boost;
 		}
 	} else if (type == INTEL_OUTPUT_HDMI) {
-- 
2.4.10