diff options
| author | Becle Lee <becle.lee@amd.com> | 2022-03-10 17:20:42 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-03-15 14:41:55 -0400 |
| commit | dd15640bcee5a5fa74fc52557dd6220f48b01116 (patch) | |
| tree | b29e618fb88972c0c7edfa4cf4366d1c7916df49 /drivers/gpu/drm/amd/display/dc/dcn20 | |
| parent | 2716bc822e2325efed0731d6a6a7dff755dc34d7 (diff) | |
drm/amd/display: Wait for hubp read line for Pollock
[Why]
Underflow occurred while hubp ret pipe read is idle and the
second pipe is powered up and added. Flickering and underflow
are only observed on Pollock.
[How]
Check the hubp ret pipe read prior to unlock pipes.
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Signed-off-by: Becle Lee <becle.lee@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn20')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index 1ef880fed776..ab910deed481 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -1739,6 +1739,16 @@ void dcn20_program_front_end_for_ctx( || pipe->stream->update_flags.raw) && hws->funcs.program_all_writeback_pipes_in_tree) hws->funcs.program_all_writeback_pipes_in_tree(dc, pipe->stream, context); + + /* Avoid underflow by check of pipe line read when adding 2nd plane. */ + if (hws->wa.wait_hubpret_read_start_during_mpo_transition && + !pipe->top_pipe && + pipe->stream && + pipe->plane_res.hubp->funcs->hubp_wait_pipe_read_start && + dc->current_state->stream_status[0].plane_count == 1 && + context->stream_status[0].plane_count > 1) { + pipe->plane_res.hubp->funcs->hubp_wait_pipe_read_start(pipe->plane_res.hubp); + } } } |