drm/amd/display: add stream ID and otg instance in dc_stream_state

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[why]
stream ID allows DMs to avoid memory address comparisons to compare
stream equality.
otg_instance allows DC to more rigorously define when otg_instance
can change.  specifically, it is now defined to be only mutable when dc_stream_state
changes.  This is better than a "get status" function which prevents efficient
caching of otherwise very stable information.

[how]
stream ID follows similar pattern to sink ID, which is already implemented

otg_instance is an output which occurs on all dc_stream modification functions

Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Jun Lei 2018-11-23 15:21:02 -05:00 • committed by Alex Deucher

parent fb57452fb4

commit 04a789bef3

4 changed files with 21 additions and 0 deletions

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5

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

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3

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

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12

drivers/gpu/drm/amd/display/dc/dc_stream.h

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1

drivers/gpu/drm/amd/display/dc/dc_types.h

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