drm/amd/display: Add GPINT handler interface

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[Why]
The General Purpose Interrupt is used on the DMCUB to pass lightweight
commands via a register to the DMCUB.

This is limited to 32-bit command and 32-bit response.

This will be used for shutting down the firmware in a clean manner.

[How]
Add the command IDs and the data register to correctly format
the commands.

Add the interface functions to dmub_srv for sending and receiving the
commands.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Nicholas Kazlauskas 2020-01-15 15:17:29 -05:00 • committed by Alex Deucher

parent 47b0c91f29

commit fbbd3f8f6b

5 changed files with 197 additions and 0 deletions

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68

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

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48

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

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22

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c

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9

drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.h

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50

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

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