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drm/amd/display: Fix in dp link-training when updating payload allocation table

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[Why & How]
Check if aux is not accessible before updating payload allocation table.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dmytro Laktyushkin 2021-06-15 15:11:31 -04:00 committed by Alex Deucher
parent 990cad0e4a
commit a30e8c13e7
1 changed files with 9 additions and 4 deletions
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13
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
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@ -6823,6 +6823,13 @@ bool dpcd_write_128b_132b_sst_payload_allocation_table(
/// Leave req_slot_count = 0 if allocate is false.
}
proposed_table->stream_count = 1; /// Always 1 stream for SST
proposed_table->stream_allocations[0].slot_count = req_slot_count;
proposed_table->stream_allocations[0].vcp_id = vc_id;
if (link->aux_access_disabled)
return true;
/// Write DPCD 2C0 = 1 to start updating
update_status.bits.VC_PAYLOAD_TABLE_UPDATED = 1;
core_link_write_dpcd(
@ -6890,10 +6897,6 @@ bool dpcd_write_128b_132b_sst_payload_allocation_table(
// TODO - DP2.0 Payload: Read and log the payload table from downstream branch
}
proposed_table->stream_count = 1; /// Always 1 stream for SST
proposed_table->stream_allocations[0].slot_count = req_slot_count;
proposed_table->stream_allocations[0].vcp_id = vc_id;
return result;
}
@ -6909,6 +6912,8 @@ bool dpcd_poll_for_allocation_change_trigger(struct dc_link *link)
union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX];
union lane_align_status_updated lane_status_updated;
if (link->aux_access_disabled)
return true;
for (i = 0; i < act_retries; i++) {
get_lane_status(link, link->cur_link_settings.lane_count, dpcd_lane_status, &lane_status_updated);