Write the payload allocation table for 128b/132b SST. Use VCPID 1 and
start from slot 0, with dp_m_n.tu slots.
This is preparation for enabling 128b/132b SST. This path is not
reachable yet. Indeed, we don't yet compute TU for 128b/132b SST.
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index eebeebef42ed..ebe098ef396a 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -2671,6 +2671,12 @@ static void mtl_ddi_pre_enable_dp(struct intel_atomic_state *state,
/* 6.o Configure and enable FEC if needed */
intel_ddi_enable_fec(encoder, crtc_state);
+ /* 7.a 128b/132b SST. */
+ if (!is_mst && intel_dp_is_uhbr(crtc_state)) {
+ /* VCPID 1, start slot 0 for 128b/132b, tu slots */
+ drm_dp_dpcd_write_payload(&intel_dp->aux, 1, 0, crtc_state->dp_m_n.tu);
+ }
+
if (!is_mst)
intel_dsc_dp_pps_write(encoder, crtc_state);
}
@@ -2810,6 +2816,11 @@ static void tgl_ddi_pre_enable_dp(struct intel_atomic_state *state,
/* 7.l Configure and enable FEC if needed */
intel_ddi_enable_fec(encoder, crtc_state);
+ if (!is_mst && intel_dp_is_uhbr(crtc_state)) {
+ /* VCPID 1, start slot 0 for 128b/132b, tu slots */
+ drm_dp_dpcd_write_payload(&intel_dp->aux, 1, 0, crtc_state->dp_m_n.tu);
+ }
+
if (!is_mst)
intel_dsc_dp_pps_write(encoder, crtc_state);
}
--
2.39.5
