summaryrefslogtreecommitdiff
path: root/drivers/gpu
diff options
context:
space:
mode:
authorVille Syrjälä <ville.syrjala@linux.intel.com>2021-01-28 17:59:44 +0200
committerJani Nikula <jani.nikula@intel.com>2021-02-02 09:10:59 +0200
commiteaf5bfe37db871031232d2bf2535b6ca92afbad8 (patch)
treee1d10353cd07ac36d44d1029a24fde635507a75e /drivers/gpu
parent1048ba83fb1c00cd24172e23e8263972f6b5d9ac (diff)
drm/i915: Skip vswing programming for TBT
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> Link: https://patchwork.freedesktop.org/patch/msgid/20210128155948.13678-1-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak <imre.deak@intel.com> (cherry picked from commit f8c6b615b921d8a1bcd74870f9105e62b0bceff3) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/display/intel_ddi.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index bf17365857ca..e1e3ac12f979 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -2754,6 +2754,9 @@ 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 (level >= n_entries) {
drm_dbg_kms(&dev_priv->drm,
@@ -2890,6 +2893,9 @@ 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 (level >= n_entries)