drm/amd/display: disable stream if pixel clock changed with link active

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[Why]
Vbios uses preferred timing to turn on edp but OS could use other
timing. If change pixel clock when link active, there is unexpected
garbage on monitor.

[How]
Once pixel clock changed, the driver needs to disable stream.

Signed-off-by: Chiawen Huang <chiawen.huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Chiawen Huang 2020-09-25 10:54:50 -04:00 • committed by Alex Deucher

parent 89b151ade7

commit ba578afd5a

2 changed files with 60 additions and 4 deletions

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62

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

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2

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

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