From: Ville Syrjälä ville.syrjala@linux.intel.com
In thunderbolt mode the PHY is owned by the thunderbolt controller. We are not supposed to touch it. So skip the vswing programming as well (we already skipped the other steps not applicable to TBT).
Touching this stuff could supposedly interfere with the PHY programming done by the thunderbolt controller.
Cc: stable@vger.kernel.org Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/i915/display/intel_ddi.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 9506b8048530..c94650488dc1 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -2827,6 +2827,9 @@ static void icl_mg_phy_ddi_vswing_sequence(struct intel_encoder *encoder, int n_entries, ln; u32 val;
+ if (enc_to_dig_port(encoder)->tc_mode == TC_PORT_TBT_ALT) + return; + ddi_translations = icl_get_mg_buf_trans(encoder, crtc_state, &n_entries);
if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations)) @@ -2962,6 +2965,9 @@ tgl_dkl_phy_ddi_vswing_sequence(struct intel_encoder *encoder, u32 val, dpcnt_mask, dpcnt_val; int n_entries, ln;
+ if (enc_to_dig_port(encoder)->tc_mode == TC_PORT_TBT_ALT) + return; + ddi_translations = tgl_get_dkl_buf_trans(encoder, crtc_state, &n_entries);
if (drm_WARN_ON_ONCE(&dev_priv->drm, !ddi_translations))