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drm/amd/display: Disable OTG for mode timing switch on DCN35

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[why]
Doing a mode timing change causes a hang when OTG is not disabled.

[how]
Add link_enc null check in disable_otg_wa to cover this case.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Ovidiu Bunea <ovidiu.bunea@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ovidiu Bunea 2023-10-25 13:05:47 -04:00 committed by Alex Deucher
parent d0ef62bd10
commit 3e18d4bd9a
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
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@ -124,7 +124,8 @@ static void dcn35_disable_otg_wa(struct clk_mgr *clk_mgr_base, struct dc_state *
if (pipe->top_pipe || pipe->prev_odm_pipe) if (pipe->top_pipe || pipe->prev_odm_pipe)
continue; continue;
if (pipe->stream && (pipe->stream->dpms_off || dc_is_virtual_signal(pipe->stream->signal))) { if (pipe->stream && (pipe->stream->dpms_off || dc_is_virtual_signal(pipe->stream->signal) ||
!pipe->stream->link_enc)) {
struct stream_encoder *stream_enc = pipe->stream_res.stream_enc; struct stream_encoder *stream_enc = pipe->stream_res.stream_enc;
if (disable) { if (disable) {