drm/i915: Fix ivb cpu edp vswing

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According to the DP spec supporting vswing 1 + preemph 2 is
mandatory. We don't have the hw settings for that though. In
order to pretend to follow the DP spec let's just select
vswing 0 + preemph 2 in this case (the DP spec says to use
the requested preemph in preference to the vswing when the
requested values aren't supported).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200512174145.3186-4-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>

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Ville Syrjälä 2020-05-12 20:41:41 +03:00

parent da882e6bb9

commit 33520eae45

1 changed files with 1 additions and 12 deletions

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

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