drm/amd/display: Optimize bandwidth validation by adding early return

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We can split validation into three parts: getting voltage level, getting
watermarks, and rq/dlg calculations. The voltage level is enough to answer
the question "do we support this state", and the rest of it is to determine
what hardware programming is needed to support the state. Most of the calls
to validate_bandwidth only care about the first part, so we added an early
return in that case

Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Joshua Aberback 2019-04-01 15:18:29 -04:00 • committed by Alex Deucher

parent 776c1f569f

commit 254eb07cb0

3 changed files with 31 additions and 18 deletions

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11

drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c

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3

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

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35

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

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