[PATCH v3 00/21] drm/i915/dp_mst: Enable link training fallback

[Ville Syrjälä]

On Mon, Jun 10, 2024 at 07:49:12PM +0300, Imre Deak wrote:
> This is v3 of [1], addressing the review comments and adding R-bs from
> Ville, the main changes being:
> 
> - Add the link check work to intel_encoder and the corresponding helper
>   functions to a new intel_encoder.c file. (Patch 7)
> - Add documentation/asserts on intel_atomic_state being valid for MST
>   vs. possibly NULL for SST links in the link training functions.
>   (Patch 9,10)
> - Lock connection_mutex in the debugfs entries only for the required
>   intel_dp state. (Patch 17-21)
> - Remove the link training info debugfs entry showing the link retrain,
>   link training failure counters and the retrain disabled state, add a
>   separate debugfs entry showing only the retrain disabled state.
>   (Patch 21)
> 
> [1] https://lore.kernel.org/all/20240520185822.3725844-1-imre.deak@intel.com
> 
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Imre Deak (21):
>   drm/i915/dp_mst: Align TUs to avoid splitting symbols across MTPs
>   drm/i915/dp: Move link train params to a substruct in intel_dp
>   drm/i915/dp: Move link train fallback to intel_dp_link_training.c
>   drm/i915/dp: Sanitize intel_dp_get_link_train_fallback_values()
>   drm/i915: Factor out function to modeset commit a set of pipes
>   drm/i915/dp: Use a commit modeset for link retraining MST links
>   drm/i915/dp: Recheck link state after modeset
>   drm/i915/dp: Reduce link params only after retrying with unchanged
>     params
>   drm/i915/dp: Pass atomic state to link training function
>   drm/i915/dp: Send a link training modeset-retry uevent to all MST
>     connectors
>   drm/i915/dp: Use check link state work in the hotplug handler
>   drm/i915/dp: Use check link state work in the detect handler
>   drm/i915/dp: Use check link state work in the HPD IRQ handler
>   drm/i915/dp: Disable link retraining after the last fallback step
>   drm/i915/dp_mst: Reset intel_dp->link_trained during disabling
>   drm/i915/dp_mst: Enable link training fallback for MST
>   drm/i915/dp: Add debugfs entries to force the link rate/lane count
>   drm/i915/dp: Add debugfs entries to get the max link rate/lane count
>   drm/i915/dp: Add debugfs entry to force link training failure
>   drm/i915/dp: Add debugfs entry to force link retrain
>   drm/i915/dp: Add debugfs entry to get the link retrain disabled state

lgtm

For the series
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> 
>  drivers/gpu/drm/i915/Makefile                 |   1 +
>  drivers/gpu/drm/i915/display/g4x_dp.c         |  35 +-
>  drivers/gpu/drm/i915/display/intel_ddi.c      |  67 +--
>  drivers/gpu/drm/i915/display/intel_display.c  |  34 ++
>  drivers/gpu/drm/i915/display/intel_display.h  |   3 +
>  .../drm/i915/display/intel_display_debugfs.c  |   2 +
>  .../drm/i915/display/intel_display_types.h    |  25 +-
>  drivers/gpu/drm/i915/display/intel_dp.c       | 270 +++++----
>  drivers/gpu/drm/i915/display/intel_dp.h       |  11 +-
>  .../drm/i915/display/intel_dp_link_training.c | 538 +++++++++++++++++-
>  .../drm/i915/display/intel_dp_link_training.h |   8 +-
>  drivers/gpu/drm/i915/display/intel_dp_mst.c   |  30 +-
>  drivers/gpu/drm/i915/display/intel_encoder.c  |  39 ++
>  drivers/gpu/drm/i915/display/intel_encoder.h  |  16 +
>  drivers/gpu/drm/xe/Makefile                   |   1 +
>  15 files changed, 878 insertions(+), 202 deletions(-)
>  create mode 100644 drivers/gpu/drm/i915/display/intel_encoder.c
>  create mode 100644 drivers/gpu/drm/i915/display/intel_encoder.h
> 
> -- 
> 2.43.3

-- 
Ville Syrjälä
Intel