[Bug 90874] [SKL] scaler atomic code tries to read back CDCLK while the device is suspended

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90874

--- Comment #2 from chandra <chandra.konduru at intel.com> ---
Initial implementation used cached scale values which were calculated at every
modeset time. But based on review feedback it was changed to use live values by
calling skylake_get_display_clock_speed(). 
Right fix is to precompute required clock and maintain in crtc_state. Either
this caller or any other caller can look into crtc_state to get the active
clock or clock that is about to be set (incase of modeset).

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