drm/amd/display: Add dpia display mode validation logic

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[Why]
If bandwidth allocation feature is enabled, connection manager wont
limit the dp tunnel bandwidth. So, need to do display mode validation
for streams on dpia links to avoid oversubscription of dp tunnel
bandwidth.

[How]
- To read non reduced link rate and lane count and update
  reported link capability.
- To calculate the bandwidth required for streams of dpia links
  per host router and validate against the allocated bandwidth for
  the host router.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: PeiChen Huang <peichen.huang@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Meenakshikumar Somasundaram 2023-12-05 00:01:15 -05:00 • committed by Alex Deucher

parent 4e7738bcfb

commit 59f1622a5f

5 changed files with 104 additions and 40 deletions

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2

drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c

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4

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

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6

drivers/gpu/drm/amd/display/dc/dc_dp_types.h

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2

drivers/gpu/drm/amd/display/dc/dc_types.h

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126

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c

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