drm/dp/mst: move GUID storage from mgr, port to only mst branch

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commit 5e93b8208d upstream.

Previous implementation does not handle case below: boot up one MST branch
to DP connector of ASIC. After boot up, hot plug 2nd MST branch to DP output
of 1st MST, GUID is not created for 2nd MST branch. When downstream port of
2nd MST branch send upstream request, it fails because 2nd MST branch GUID
is not available.

New Implementation: only create GUID for MST branch and save it within Branch.

Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Hersen Wu 2016-01-22 17:07:28 -05:00 • committed by Greg Kroah-Hartman

parent 6cd43e68d9

commit ad9421d86e

2 changed files with 38 additions and 51 deletions

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include/drm/drm_dp_mst_helper.h

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