From: Ville Syrjälä <ville.syrj...@linux.intel.com> Implement the POST_LT_ADJ_REQ sequence, which is supposed to be used to further tune the link vswing/pre-emphasis when TPS4 is not supported.
Unfortunately I don't have any displays/dongles that support this so I wasn't able to test anything. Imre has tested this with a DP tester though. v2: rebase after all the prep stuff got merged Ville Syrjälä (4): drm/dp: Add definitions for POST_LT_ADJ training sequence drm/dp: Add POST_LT_ADJ_REQ helpers drm/i915/dp: Implement the POST_LT_ADJ_REQ sequence hax: drm/i915: Disable TPS4 support to force POST_LT_ADJ_REQ usage drivers/gpu/drm/display/drm_dp_helper.c | 8 ++ .../drm/i915/display/intel_dp_link_training.c | 131 +++++++++++++++++- .../drm/i915/display/intel_dp_link_training.h | 2 +- drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 +- include/drm/display/drm_dp.h | 3 + include/drm/display/drm_dp_helper.h | 8 ++ 6 files changed, 150 insertions(+), 4 deletions(-) -- 2.49.0
