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drm/amd/display: Add dpia display mode validation logic
[ Upstream commit 59f1622 ] [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> Stable-dep-of: 0484e05 ("drm/amd/display: fixed integer types and null check locations") Signed-off-by: Sasha Levin <sashal@kernel.org>
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