[RFC v3 08/15] drm/i915/ddi: enable 128b/132b TRANS_DDI_FUNC_CTL mode for UHBR SST

[Imre Deak]

From: Jani Nikula <jani.nikula at intel.com>

128b/132b SST needs 128b/132b mode enabled in the TRANS_DDI_FUNC_CTL
register.

This is preparation for enabling 128b/132b SST. This path is not
reachable yet.

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 4f9c509964466..ec5f0534f4df6 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -577,7 +577,10 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
 			temp |= TRANS_DDI_MST_TRANSPORT_SELECT(master);
 		}
 	} else {
-		temp |= TRANS_DDI_MODE_SELECT_DP_SST;
+		if (intel_dp_is_uhbr(crtc_state))
+			temp |= TRANS_DDI_MODE_SELECT_FDI_OR_128B132B;
+		else
+			temp |= TRANS_DDI_MODE_SELECT_DP_SST;
 		temp |= DDI_PORT_WIDTH(crtc_state->lane_count);
 	}
 
-- 
2.44.2