drm/amd/display: Query VCO frequency from register for DCN3.1

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[Why]
Hardcoding the VCO frequency isn't correct since we don't own or control
the value.

In the case where the hardcode is also missing we can't lightup display.

[How]
Query from the CLK register instead. Update the DFS frequency to be able
to compute the VCO frequency.

Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Nicholas Kazlauskas 2021-07-07 16:38:57 -04:00 • committed by Alex Deucher

parent f30f551587

commit b0364fa4fc

2 changed files with 42 additions and 55 deletions

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43

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c

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54

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.h

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