drm/i915: WARN about invalid lane reversal in TBT-alt/DP-alt modes

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Lane reversal happens only in the FIA module for TBT-alt/DP-alt mode, so
WARN if lane reversal is attempted at a different level. See the
BSpec DDI_BUF_CTL register description.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190628143635.22066-24-imre.deak@intel.com

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Imre Deak 2019-06-28 17:36:35 +03:00

parent a171f8e7f4

commit 3ee2771e47

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

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