drm/i915: Query the vswing levels per-lane for snps phy

Prepare for per-lane drive settings by querying the desired vswing
level per-lane.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211006204937.30774-12-ville.syrjala@linux.intel.comReviewed-by: NJosé Roberto de Souza <jose.souza@intel.com>

drivers/gpu/drm/i915/display/intel_snps_phy.c

@@ -58,7 +58,6 @@ void intel_snps_phy_set_signal_levels(struct intel_encoder *encoder,
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	const struct intel_ddi_buf_trans *trans;
 	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
-	int level = intel_ddi_level(encoder, crtc_state, 0);
 	int n_entries, ln;
 
 	trans = encoder->get_buf_trans(encoder, crtc_state, &n_entries);
@@ -66,6 +65,7 @@ void intel_snps_phy_set_signal_levels(struct intel_encoder *encoder,
 		return;
 
 	for (ln = 0; ln < 4; ln++) {
+		int level = intel_ddi_level(encoder, crtc_state, ln);
 		u32 val = 0;
 
 		val |= REG_FIELD_PREP(SNPS_PHY_TX_EQ_MAIN, trans->entries[level].snps.vswing);