[PATCH v6 0/6] Link off between frames for edp

[Hogander, Jouni]

On Mon, 2024-05-27 at 13:56 +0530, Animesh Manna wrote:
> Link Off Between Active Frames (LOBF) allows an eDP link to be turned
> Off and On
> durning long VBLANK durations without enabling any of the PSR/PSR2/PR
> modes of operation.
> 
> Bspec: 71477
> 
> Note: Lobf need to be enabled adaptive sync fixed refresh mode
> where vmin = vmax = flipline, which will arise after cmmr feature
> enablement. Currently existing code refactored and make compute-
> config()
> and enabling function ready. Will add enabling sequence in a separate
> patch.

For the whole set:

Reviewed-by: Jouni Högander <jouni.hogander at intel.com>

Couple of points that needs some attention later:

PSR code should move to use intel_alpm_aux_wake_supported and
intel_alpm_aux_less_wake_supported rather than read
DP_RECEIVER_ALPM_CAP again. I will probably take care of this in my
Panel Replay eDP patch set.

We could have common intel_alpm_compute_config which would calculate
alpm_params. Then common intel_alpm_configure call for both PSR and
LOBF which would write what is computed in intel_alpm_compute_config,
intel_alpm_lobf_compute_config and intel_psr_compute_config.

BR,

Jouni Högander

> 
> Signed-off-by: Animesh Manna <animesh.manna at intel.com>
> 
> Animesh Manna (5):
>   drm/i915/alpm: Move alpm parameters from intel_psr
>   drm/i915/alpm: Move alpm related code to a new file
>   drm/i915/alpm: Add compute config for lobf
>   drm/i915/alpm: Enable lobf from source in ALPM_CTL
>   drm/i915/alpm: Add debugfs for LOBF
> 
> Jouni Högander (1):
>   drm/display: Add missing aux less alpm wake related bits
> 
>  drivers/gpu/drm/i915/Makefile                 |   1 +
>  drivers/gpu/drm/i915/display/intel_alpm.c     | 411
> ++++++++++++++++++
>  drivers/gpu/drm/i915/display/intel_alpm.h     |  25 ++
>  .../drm/i915/display/intel_display_debugfs.c  |   2 +
>  .../drm/i915/display/intel_display_types.h    |  26 +-
>  drivers/gpu/drm/i915/display/intel_dp.c       |   4 +
>  drivers/gpu/drm/i915/display/intel_psr.c      | 303 +------------
>  drivers/gpu/drm/xe/Makefile                   |   1 +
>  include/drm/display/drm_dp.h                  |   5 +-
>  9 files changed, 475 insertions(+), 303 deletions(-)
>  create mode 100644 drivers/gpu/drm/i915/display/intel_alpm.c
>  create mode 100644 drivers/gpu/drm/i915/display/intel_alpm.h
>