drm/i915/display: Handle lane polarity for DDI port

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Lane Reversal is required for some of the DDI ports. This information
is populated in VBT and driver should read the same and set the
polarity while enabling the port. This patch handles the same.

It helps fix a display blankout issue on DP ports on certain
platforms.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210211114209.23866-1-uma.shankar@intel.com

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This commit is contained in:

Uma Shankar 2021-02-11 17:12:09 +05:30

parent b305fc7490

commit aaab24bb25

3 changed files with 22 additions and 0 deletions

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17

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

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2

drivers/gpu/drm/i915/display/intel_bios.h

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3

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

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