[PATCH 0/9] drm/i915/dp: Implement POST_LT_ADJ_REQ

[Imre Deak]

On Mon, Feb 24, 2025 at 07:26:36PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at 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. Hopefully CI has
> something...

On patches 1-8:
Tested-by: Imre Deak <imre.deak at intel.com>
Reviewed-by: Imre Deak <imre.deak at intel.com>

Few nits later on the patches.

> Ville Syrjälä (9):
>   drm/dp: Add definitions for POST_LT_ADJ training sequence
>   drm/dp: Add POST_LT_ADJ_REQ helpers
>   drm/i915/dp: Clear DPCD training pattern before transmitting the idle
>     pattern
>   drm/i915/dp: Have intel_dp_get_adjust_train() tell us if anything
>     changed
>   drm/i915/dp: Implement the POST_LT_ADJ_REQ sequence
>   drm/i915/dp: Move intel_dp_training_pattern()
>   drm/i915/dp: Implement .set_idle_link_train() for everyone
>   drm/i915/dp: Make .set_idle_link_train() mandatory
>   hax: drm/i915: Disable TPS4 support to force POST_LT_ADJ_REQ usage
> 
>  drivers/gpu/drm/display/drm_dp_helper.c       |   8 +
>  drivers/gpu/drm/i915/display/g4x_dp.c         |  33 ++-
>  .../drm/i915/display/intel_dp_link_training.c | 267 +++++++++++++-----
>  .../drm/i915/display/intel_dp_link_training.h |   4 +-
>  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 +
>  7 files changed, 253 insertions(+), 72 deletions(-)
> 
> -- 
> 2.45.3
>