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drm/amd/display: Wrap OTG disable workaround with FIFO control

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[Why]
The DIO FIFO will underflow if we turn off the OTG before we turn
off the FIFO.

Since this happens as part of the OTG workaround and we don't reset
the FIFO afterwards we see the error persist.

[How]
Add disable FIFO before the disable CRTC and enable FIFO after enabling
the CRTC.

Reviewed-by: Syed Hassan <Syed.Hassan@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas 2022-09-08 14:17:01 -04:00 committed by Alex Deucher
parent dd37fba90e
commit ec669ef2e2
1 changed files with 10 additions and 1 deletions
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11
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
View file

@ -130,11 +130,20 @@ static void dcn314_disable_otg_wa(struct clk_mgr *clk_mgr_base, struct dc_state
if (pipe->top_pipe || pipe->prev_odm_pipe)
continue;
if (pipe->stream && (pipe->stream->dpms_off || dc_is_virtual_signal(pipe->stream->signal))) {
struct stream_encoder *stream_enc = pipe->stream_res.stream_enc;
if (disable) {
if (stream_enc && stream_enc->funcs->disable_fifo)
pipe->stream_res.stream_enc->funcs->disable_fifo(stream_enc);
pipe->stream_res.tg->funcs->immediate_disable_crtc(pipe->stream_res.tg);
reset_sync_context_for_pipe(dc, context, i);
} else
} else {
pipe->stream_res.tg->funcs->enable_crtc(pipe->stream_res.tg);
if (stream_enc && stream_enc->funcs->enable_fifo)
pipe->stream_res.stream_enc->funcs->enable_fifo(stream_enc);
}
}
}
}