drm/amd/display: Add aconnector condition check for dpcd read

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[Why]
core_link_read_dpcd() will invoke dm_helpers_dp_read_dpcd(),
which needs to read dpcd info with the help of aconnector.
If aconnector (dc->links[i]->prev) is NULL, then dpcd status
 cannot be read.

As a result, dpcd read fails and a line of error will be
printed out in dmesg.log as:
"*ERROR* Failed to found connector for link!"

[How]
Make sure that aconnector (dc->links[i]->prev) is not NULL,
then read dpcd status.

Signed-off-by: Zhan Liu <zhan.liu@amd.com>
Reviewed-by: Joseph Gravenor <Joseph.Gravenor@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Zhan Liu 2020-02-21 17:25:47 -05:00 • committed by Alex Deucher

parent b80cd524ac

commit f739ce5768

1 changed files with 14 additions and 7 deletions

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21

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

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