drm/i915/dp: Initialize the source OUI write timestamp always

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commit 5861258c4e upstream.

If the source OUI DPCD register value matches the expected Intel OUI
value, the write timestamp doesn't get updated leaving it at the 0
initial value if the OUI wasn't written before. This can lead to an
incorrect wait duration in intel_dp_wait_source_oui(), since jiffies is
not inited to 0 in general (on a 32 bit system INITIAL_JIFFIES is set to
5 minutes ahead of wrap-around). Fix this by intializing the write
timestamp in the above case as well.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241025160259.3088727-4-imre.deak@intel.com
Cc: "H. Nikolaus Schaller" <hns@goldelico.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Imre Deak 2024-10-25 19:02:54 +03:00 • committed by Greg Kroah-Hartman

parent fe0d2f610f

commit e656ba6ca5

1 changed files with 4 additions and 1 deletions

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

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