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drm/amd/display: Fix calculation of virtual channel payload

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[why]
The calculation of virtual channel payload would not take link settings
in account. As we calculate VCPI slots needed both PBN for stream and
also PBN per time slot.  Before we would use generic PBN per time slot,
which would not change with link settings causing wrong Payload
allocation.

[how]
Provide PBN per time slot for each Virtual channel payload calculation.

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mikita Lipski
2020-06-01 10:26:11 -04:00
committed by Alex Deucher
parent de7653fde0
commit 03ca960098
2 changed files with 10 additions and 11 deletions
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2
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -5452,7 +5452,7 @@ static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder,
mst_mgr,
mst_port,
dm_new_connector_state->pbn,
0);
dm_mst_get_pbn_divider(aconnector->dc_link));
if (dm_new_connector_state->vcpi_slots < 0) {
DRM_DEBUG_ATOMIC("failed finding vcpi slots: %d\n", (int)dm_new_connector_state->vcpi_slots);
return dm_new_connector_state->vcpi_slots;