linux.git/drivers/gpu/drm/amd/display/dc/bios/command_table2.c, branch v5.9

drm/amd/display: Call DMUB for eDP power control

2020-08-18T21:55:36+00:00

[Why]
If DMUB is used, LVTMA VBIOS call can be used to control eDP instead of
tranditional transmitter control.  Interface is agreed with VBIOS for
eDP to use this new path to program LVTMA registers.

[How]
Create DAL interface to send DMUB command for LVTMA as currently
implemented in VBIOS.

Signed-off-by: Chris Park 
Reviewed-by: Nicholas Kazlauskas 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: Pass command instead of header into DMUB service

2020-04-28T20:19:05+00:00

[Why]
We read memory that we shouldn't be touching if the struct isn't
a full union dmub_rb_cmd.

[How]
Fix up all the callers and functions that take in the dmub_cmd_header
to use the dmub_rb_cmd instead.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Tony Cheng 
Acked-by: Aurabindo Pillai 
Signed-off-by: Alex Deucher

drm/amd/display: Don't map ATOM_ENABLE to ATOM_INIT

2020-02-11T16:50:48+00:00

[Why]
In DCN hardware sequencer we do actually call ATOM_INIT correctly per
pipe. The workaround is not necessary for command table offloading.

[How]
Drop the workaround since it's not needed.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Chris Park 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: Don't treat missing command table as failure

2020-02-11T16:49:35+00:00

[Why]
With the fallback case in place for command table offloading via DMCUB
it's no longer an error for the command table to be missing specific
entries.

[How]
Drop the BREAK_TO_DEBUGGER();

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Chris Park 
Acked-by: Rodrigo Siqueira 
Signed-off-by: Alex Deucher

drm/amd/display: Call ATOM_INIT instead of ATOM_ENABLE for DMCUB

2020-01-22T21:55:28+00:00

[Why]
DMCUB command table doesn't support ATOM_ENABLE/ATOM_DISABLE anymore
so we never end up calling the DCN init path in DMCUB.

[How]
Map ATOM_ENABLE to ATOM_INIT only for DMCUB command table offloading.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Tony Cheng 
Acked-by: Bhawanpreet Lakha 
Signed-off-by: Alex Deucher

drm/amd/display: Fallback to DMCUB when command table is missing

2020-01-22T21:55:27+00:00

[Why]
If the command table isn't available then we can fallback to DMCUB
offloading if it's enabled and available.

[How]
Instead of assigning NULL for supported command table functions we can
fallback to the DMCUB when it's available.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Wesley Chalmers 
Acked-by: Bhawanpreet Lakha 
Signed-off-by: Alex Deucher

drm/amd/display: Split DMUB cmd type into type/subtype

2019-12-05T21:30:35+00:00

[Why]
Commands will be considered a stable ABI between driver and firmware.

Commands are also split between DC commands, DAL feature commands,
and VBIOS commands.

Commands are currently not designated to a specific ID and the enum
does not provide a stable ABI.

We currently group all of these into a single command type of 8-bits.
With the stable ABI consideration in mind it's not unreasonable to
run out of command IDs.

For cleaner separation and versioning split the commands into a main
type and a subtype.

[How]
For commands where performance matters (like reg sequences) these
are still considered main commands.

Sub commands will be split by ownership/feature.

Update existing command sequences to reflect new changes.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Tony Cheng 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Drop CONFIG_DRM_AMD_DC_DMUB guards

2019-11-13T20:29:42+00:00

[Why]
Support for DMUB only depends on support for DC. It doesn't use floating
point so we don't need to guard it by any specific DCN revision.

[How]
Drop the guards and cleanup the newlines around each one.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Hersen Wu 
Acked-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Add DMUB support to DC

2019-11-13T20:29:42+00:00

DC will use DMUB for command submission and flow control during
initialization.

Register offloading as well as submitting some BIOS commands are part
of the DC internal interface but are guarded behind debug options.

It won't be functional in amdgpu_dm yet since we don't pass the
DMUB service to DC for use.

Signed-off-by: Nicholas Kazlauskas 
Reviewed-by: Hersen Wu 
Acked-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Connect dig_fe to otg directly instead of calling bios

2019-01-25T21:15:37+00:00

[Why] After call bios table crtc_source_select, dal will program fmt
again. The bios table program dig_source_select and other fmt register
for bios usage which is redundancy and uncessary.

[How] Program dig_soruce_select register directly

Signed-off-by: hersen wu 
Reviewed-by: Charlene Liu 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher