drm/i915: Unduplicate VLV signal level code

The logic for setting signal levels is used for both HDMI and DP with
small variations. But it is similar enough to put behind a function
called from the encoders.

v2: Remove unrelated MST changes due to rebase fumble. (Jim Bride)
    Fix typo in the commit message. (Jim Bride)

v3: Really fix the typo. (Jim)

Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Jim Bride <jim.bride@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461761065-21195-8-git-send-email-ander.conselvan.de.oliveira@intel.com
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index ed7889e..5c044ce 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1609,21 +1609,15 @@
 	val |= 0x001000c4;
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val);
 
-	/* HDMI 1.0V-2dB */
-	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0);
-	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), 0x2b245f5f);
-	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port), 0x5578b83a);
-	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0c782040);
-	vlv_dpio_write(dev_priv, pipe, VLV_TX3_DW4(port), 0x2b247878);
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
-	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), 0x00002000);
-	vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), DPIO_TX_OCALINIT_EN);
-
 	/* Program lane clock */
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
 	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
 	mutex_unlock(&dev_priv->sb_lock);
 
+	/* HDMI 1.0V-2dB */
+	vlv_set_phy_signal_level(encoder, 0x2b245f5f, 0x00002000, 0x5578b83a,
+				 0x2b247878);
+
 	intel_hdmi->set_infoframes(&encoder->base,
 				   intel_crtc->config->has_hdmi_sink,
 				   adjusted_mode);