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drm/amd/display: adjust flow for deallocation mst payload

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[Why]
MST relevant variables are maintained at drm side. As the result, we
still have to call drm_dp_remove_payload_part2() to update the relevant
values regardless the link is under mst mode or not. We used to have a
workaround patch to tackle this: commit 3d8fcc6740 ("drm/amd/display:
Extract temp drm mst deallocation wa into its own function")

Now it's time to remove the workaround and adjust the flow.

[How]
During deallocate_mst_payload(), source actually doesn't send out
ALLOCATE_PAYLOAD at the end as like the flow in allocate_mst_payload().
Call function dm_helpers_dp_mst_send_payload_allocation() at the end of
deallocate_mst_payload() is a bit confusing.

Separate dm_helpers_dp_mst_send_payload_allocation() into 2 functions.
Have a new function dm_helpers_dp_mst_update_mst_mgr_for_deallocation()
to replace dm_helpers_dp_mst_send_payload_allocation() for payload
deallocation.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wayne Lin
2023-08-07 15:34:39 +08:00
committed by Alex Deucher
parent 43b8ac4b34
commit 83a79dd6f4
5 changed files with 50 additions and 138 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/amd/display/dc/dm_helpers.h
View File

@@ -103,10 +103,16 @@ enum act_return_status dm_helpers_dp_mst_poll_for_allocation_change_trigger(
/*
* Sends ALLOCATE_PAYLOAD message.
*/
bool dm_helpers_dp_mst_send_payload_allocation(
void dm_helpers_dp_mst_send_payload_allocation(
struct dc_context *ctx,
const struct dc_stream_state *stream,
bool enable);
const struct dc_stream_state *stream);
/*
* Update mst manager relevant variables
*/
void dm_helpers_dp_mst_update_mst_mgr_for_deallocation(
struct dc_context *ctx,
const struct dc_stream_state *stream);
bool dm_helpers_dp_mst_start_top_mgr(
struct dc_context *ctx,