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drm/amd/display: Don't lock phantom pipe on disabling

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[ Upstream commit cbb4c9bc55 ]

[Description]
- When disabling a phantom pipe, we first enable the phantom
  OTG so the double buffer update can successfully take place
- However, want to avoid locking the phantom otherwise setting
  DPG_EN=1 for the phantom pipe is blocked (without this we could
  hit underflow due to phantom HUBP being blanked by default)

Reviewed-by: Samson Tam <samson.tam@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alvin Lee 2023-08-23 10:18:36 -04:00 committed by Greg Kroah-Hartman
parent 67af2e23e2
commit f95d571bb5
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
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@ -111,7 +111,8 @@ void dcn10_lock_all_pipes(struct dc *dc,
if (pipe_ctx->top_pipe ||
!pipe_ctx->stream ||
(!pipe_ctx->plane_state && !old_pipe_ctx->plane_state) ||
!tg->funcs->is_tg_enabled(tg))
!tg->funcs->is_tg_enabled(tg) ||
pipe_ctx->stream->mall_stream_config.type == SUBVP_PHANTOM)
continue;
if (lock)