drm/i915: Enhance cdclk sanitization

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When reading out the BIOS-programmed cdclk state, let's make sure that
the cdclk value is on the valid list for the platform, ensure that the
VCO matches the cdclk, and ensure that the CD2X divider was set
properly.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190910154252.30503-8-matthew.d.roper@intel.com

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Matt Roper 2019-09-10 08:42:51 -07:00

parent d2f429ebb9

commit 8f9f717d6c

1 changed files with 32 additions and 2 deletions

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drivers/gpu/drm/i915/display/intel_cdclk.c

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