From 9e29d34e7eb914eac7f16e9281d652f24b4eef68 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Wed, 6 Oct 2021 23:49:29 +0300
Subject: drm/i915: Query the vswing levels per-lane for icl combo phy
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Git-commit: 31e914a2307a29dfde8027cffa70292341bd379d
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

Prepare for per-lane drive settings by querying the desired vswing
level per-lane.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211006204937.30774-9-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/display/intel_ddi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 327c5db16756..6617e8172a74 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -1040,7 +1040,6 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
 					 const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	int level = intel_ddi_level(encoder, crtc_state, 0);
 	const struct intel_ddi_buf_trans *trans;
 	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
 	int n_entries, ln;
@@ -1070,6 +1069,8 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
 
 	/* Program PORT_TX_DW2 */
 	for (ln = 0; ln < 4; ln++) {
+		int level = intel_ddi_level(encoder, crtc_state, ln);
+
 		val = intel_de_read(dev_priv, ICL_PORT_TX_DW2_LN(ln, phy));
 		val &= ~(SWING_SEL_LOWER_MASK | SWING_SEL_UPPER_MASK |
 			 RCOMP_SCALAR_MASK);
@@ -1083,6 +1084,8 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
 	/* Program PORT_TX_DW4 */
 	/* We cannot write to GRP. It would overwrite individual loadgen. */
 	for (ln = 0; ln < 4; ln++) {
+		int level = intel_ddi_level(encoder, crtc_state, ln);
+
 		val = intel_de_read(dev_priv, ICL_PORT_TX_DW4_LN(ln, phy));
 		val &= ~(POST_CURSOR_1_MASK | POST_CURSOR_2_MASK |
 			 CURSOR_COEFF_MASK);
@@ -1094,6 +1097,8 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder,
 
 	/* Program PORT_TX_DW7 */
 	for (ln = 0; ln < 4; ln++) {
+		int level = intel_ddi_level(encoder, crtc_state, ln);
+
 		val = intel_de_read(dev_priv, ICL_PORT_TX_DW7_LN(ln, phy));
 		val &= ~N_SCALAR_MASK;
 		val |= N_SCALAR(trans->entries[level].icl.dw7_n_scalar);
-- 
2.38.1