drm/i915/dp: read Aux RD interval just before setting the FFE preset

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Figure 3-52: 128b132b DP DPTC LANEx_CHANNEL_EQ_DONE Sequence of
DP2.1a spec.
After reading LANEx_CHANNEL_EQ_DONE, read the FFE presets.
AUX_RD_INTERVAL and then write the new FFE presets.

v4: Read AUX_RD_INTERVAL before get/set TX FFE preset (Jani)

Co-developed-by: Srikanth V NagaVenkata <nagavenkata.srikanth.v@intel.com>
Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241011045825.2629469-1-arun.r.murthy@intel.com

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Arun R Murthy 2024-10-11 10:28:25 +05:30 • committed by Suraj Kandpal

parent af02ee4fb6

commit eb0c1757a3

1 changed files with 8 additions and 7 deletions

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

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