[Intel-gfx] [PATCH 4/4] drm/i915/mst: Always write CHICKEN_TRANS

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Since we're asked to disable FECSTALL_DIS_DPTSTREAM_DPTTG when
the transcoder is disabled it seems prudent to also clear it
when enabliing the transcoder w/o FEC, just in case
someone else left it enabled by mistake.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 3c66a3e3cc5e..38ad81d3bbe6 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -817,12 +817,14 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state,
 	drm_dp_add_payload_part2(&intel_dp->mst_mgr, &state->base,
 				 drm_atomic_get_mst_payload_state(mst_state, connector->port));
 
-	if (DISPLAY_VER(dev_priv) >= 14 && pipe_config->fec_enable)
-		intel_de_rmw(dev_priv, MTL_CHICKEN_TRANS(trans), 0,
-			     FECSTALL_DIS_DPTSTREAM_DPTTG);
-	else if (DISPLAY_VER(dev_priv) >= 12 && pipe_config->fec_enable)
-		intel_de_rmw(dev_priv, CHICKEN_TRANS(trans), 0,
-			     FECSTALL_DIS_DPTSTREAM_DPTTG);
+	if (DISPLAY_VER(dev_priv) >= 14)
+		intel_de_rmw(dev_priv, MTL_CHICKEN_TRANS(trans),
+			     FECSTALL_DIS_DPTSTREAM_DPTTG,
+			     pipe_config->fec_enable ? FECSTALL_DIS_DPTSTREAM_DPTTG : 0);
+	else if (DISPLAY_VER(dev_priv) >= 12)
+		intel_de_rmw(dev_priv, CHICKEN_TRANS(trans),
+			     FECSTALL_DIS_DPTSTREAM_DPTTG,
+			     pipe_config->fec_enable ? FECSTALL_DIS_DPTSTREAM_DPTTG : 0);
 
 	intel_audio_sdp_split_update(pipe_config);
 
-- 
2.41.0