drm/amd/display: Fix MST downstream display not light up regression

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The fix is for the scenario: MST+SST chain together, and hook up
to the card.

Regression: Per stream validate_context build v2
Before dc_add_stream_to_ctx(), need to update/reset
stream signal type to SIGNAL_TYPE_DISPLAY_PORT_MST. Otherwise,
downstream device cannot be added to ctx due to the lack of signal
type info (SIGNAL_TYPE_NONE).
update_stream_signal() needs to be done after stream is created.

Signed-off-by: Jerry Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Jerry Zuo 2017-08-24 16:03:02 -04:00 • committed by Alex Deucher

parent aac6a07e40

commit 96313f1b7a

2 changed files with 24 additions and 25 deletions

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25

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

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24

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

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