drm/i915/skl: Support for edp low_vswing param in vbt

[linux-2.6-block.git] / drivers / gpu / drm / i915 / intel_bios.c

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 3f178258d9f9ce679044d2775b66359297d68623..c684085cb56ac0d3001ded0c81cbe72da4341a28 100644 (file)
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -662,6 +662,13 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
                              edp_link_params->vswing);
                break;
        }
+
+       if (bdb->version >= 173) {
+               uint8_t vswing;
+
+               vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
+               dev_priv->vbt.edp_low_vswing = vswing == 0;
+       }
 }
 
 static void