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

[Ville Syrjala]

From: Ville Syrjälä <ville.syrj...@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.syrj...@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