drm/i915: Tolerate bogus DPLL selection

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Let's check that we actually found the PLL before doing the
port_clock readout, just in case the hardware was severly
misprogrammed by the previous guy. Not sure the hw would
even survive such misprogramming without hanging but no
real harm in checking anyway.

Cc: Karthik B S <karthik.b.s@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210310194351.6233-1-ville.syrjala@linux.intel.com
Reviewed-by: Karthik B S <karthik.b.s@intel.com>

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Ville Syrjälä 2021-03-10 21:43:51 +02:00

parent 35bb28ece9

commit 086877a12f

1 changed files with 13 additions and 4 deletions

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

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