drm/amd/display: Allocate scratch space for DMUB CW7

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[Why]
The scratch space can be used to pass data between x86 and DMCUB.  DMCUB
will manage the actually mapping of CW7 internally, driver does not
program the window.

[How]
Allocate extra space within the DMUB service's framebuffer for this
scratch space and expose them from the service for use in DC.

Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Wyatt Wood 2020-03-05 15:14:01 -05:00 • committed by Alex Deucher

parent eb1b4573c0

commit 2277f01dbc

2 changed files with 16 additions and 4 deletions

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3

drivers/gpu/drm/amd/display/dmub/inc/dmub_srv.h

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17

drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

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