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[04/25] drm/i915/dp: Return the right vswing tables

Message ID 20200514173604.37922-5-tjaalton@ubuntu.com
State New
Headers show
Series drm/i915: TGL enablement, part 3 | expand

Commit Message

Timo Aaltonen May 14, 2020, 5:35 p.m. UTC 
From: José Roberto de Souza <jose.souza@intel.com>

BugLink: https://bugs.launchpad.net/bugs/1855399

DDI ports have its encoders initialized with INTEL_OUTPUT_DDI type and
later eDP ports that have the type changed to INTEL_OUTPUT_EDP.
But for all other DDI ports it can drive HDMI or DP depending on what
user connects to the ports.

ehl_get_combo_buf_trans() and tgl_get_combo_buf_trans() was checking
for INTEL_OUTPUT_DP that was never true, causing wrong vswing tables
being used.

So here replacing the INTEL_OUTPUT_DP checks by the valid output types
that this functions receives as parameters. HDMI cases will be
correctly handled as it do not use encoder->type, instead it calls the
functions with INTEL_OUTPUT_HDMI as type parameter and HDMI don't have
retraining.

v2:
changed INTEL_OUTPUT_DDI to INTEL_OUTPUT_EDP and INTEL_OUTPUT_HDMI

Fixes: bd3cf6f7ce20 ("drm/i915/dp/tgl+: Update combo phy vswing tables")
Cc: Clinton A Taylor <clinton.a.taylor@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200330210044.130510-1-jose.souza@intel.com
(backported from commit 70988115ac69ecc249aa0f8e8265e8daf87bc28c)
Signed-off-by: Timo Aaltonen <timo.aaltonen@canonical.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 10d95fcca362..419ce5822bfe 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -933,7 +933,7 @@  static const struct cnl_ddi_buf_trans *
 tgl_get_combo_buf_trans(struct drm_i915_private *dev_priv, int type, int rate,
 			int *n_entries)
 {
-	if (type != INTEL_OUTPUT_DP) {
+	if (type == INTEL_OUTPUT_HDMI || type == INTEL_OUTPUT_EDP) {
 		return icl_get_combo_buf_trans(dev_priv, type, rate, n_entries);
 	} else if (rate > 270000) {
 		*n_entries = ARRAY_SIZE(tgl_combo_phy_ddi_translations_dp_hbr2);