drm/amd/display: adjust MALL size available for DCN32 and DCN321

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commit 235fef6c7f upstream.

[Why]
MALL size available can vary for different SKUs.
Use num_chans read from VBIOS to determine the available MALL size we can use

[How]
Define max_chans for DCN32 and DCN321.
If num_chans is max_chans, then return max_chans as we can access the
 entire MALL space.
Otherwise, define avail_chans as the number of available channels we are
 allowed instead.
Return corresponding number of channels back and use this to calculate
 available MALL size.

Reviewed-by: Nevenko Stupar <Nevenko.Stupar@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Samson Tam 2023-01-11 13:31:31 -05:00 • committed by Greg Kroah-Hartman

parent 02c8fa11f5

commit 38327b6cb1

5 changed files with 78 additions and 5 deletions

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62

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c

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2

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h

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9

drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c

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5

drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

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5

drivers/gpu/drm/amd/display/dc/dml/dcn321/dcn321_fpu.c

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