Re: [RFC PATCH 0/4] Framework for display parameters

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On 05/10/2023 13:52, Jani Nikula wrote:
On Thu, 05 Oct 2023, Jouni Högander <jouni.hogander@xxxxxxxxx> wrote:
Currently all module parameters are handled by i915_param.c/h. This
is a problem for display parameters when Xe driver is used.

This patch set adds a mechanism to add parameters specific to the
display. This is mainly copied from existing i915 parameters
implementation with some naming changes and taking into account
varying driver name.

Also fbc and psr related parameter are moved as an example.

Added some more Cc's as FYI.

It's not perfect, but I'm okay with the general approach. I've hoped for
a beautiful solution to the problem, but hopes don't turn into code.

I'll reply with some bikeshedding comments to the individual patches.

Looks fine to me.

If one day display becomes a separate .ko and we maybe allow not building it for headless then the interface is a bit too intimate, but until then it looks like it will work fine.

Regards,

Tvrtko


BR,
Jani.



Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Uma Shankar <uma.shankar@xxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>

Jouni Högander (4):
   drm/i915/display: Add framework to add parameters specific to display
   drm/i915/display: Dump also display parameters into GPU error dump
   drm/i915/display: Move enable_fbc module parameter under display
   drm/i915/display: Move psr related module parameters under display

  drivers/gpu/drm/i915/Makefile                 |   2 +
  drivers/gpu/drm/i915/display/i9xx_wm.c        |   2 +-
  .../gpu/drm/i915/display/intel_display_core.h |   2 +
  .../drm/i915/display/intel_display_debugfs.c  |   2 +
  .../display/intel_display_debugfs_params.c    | 239 ++++++++++++++++++
  .../display/intel_display_debugfs_params.h    |  14 +
  .../drm/i915/display/intel_display_device.c   |   8 +
  .../drm/i915/display/intel_display_device.h   |   1 +
  .../drm/i915/display/intel_display_params.c   | 166 ++++++++++++
  .../drm/i915/display/intel_display_params.h   |  65 +++++
  drivers/gpu/drm/i915/display/intel_fbc.c      |  10 +-
  drivers/gpu/drm/i915/display/intel_psr.c      |  14 +-
  drivers/gpu/drm/i915/i915_driver.c            |   2 +
  drivers/gpu/drm/i915/i915_gpu_error.c         |   3 +
  drivers/gpu/drm/i915/i915_gpu_error.h         |   2 +
  drivers/gpu/drm/i915/i915_params.c            |  19 --
  drivers/gpu/drm/i915/i915_params.h            |   4 -
  17 files changed, 519 insertions(+), 36 deletions(-)
  create mode 100644 drivers/gpu/drm/i915/display/intel_display_debugfs_params.c
  create mode 100644 drivers/gpu/drm/i915/display/intel_display_debugfs_params.h
  create mode 100644 drivers/gpu/drm/i915/display/intel_display_params.c
  create mode 100644 drivers/gpu/drm/i915/display/intel_display_params.h




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