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dd4f3ee535
When no displays are connected, there is no vblank happening so the power management code shouldn't worry about it. This fixes a regression that caused the memory clock to be stuck at maximum when there were no displays connected to a SI GPU. Fixes:9003a07468("drm/amd/pm: Treat zero vblank time as too short in si_dpm (v3)") Fixes:9d73b107a6("drm/amd/pm: Use pm_display_cfg in legacy DPM (v2)") Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Tested-by: Jeremy Klarenbeek <jeremy.klarenbeek99@gmail.com> Signed-off-by: Timur Kristóf <timur.kristof@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry picked from commit 6d87e0199f7b83735b56e422d59f170a201897a8) Cc: stable@vger.kernel.org