[RFC v3 00/10] drm: Extract DPCD backlight helpers from i915, add support in nouveau

[Lyude Paul]

thanks for the review comments everyone! I'm going through them now but realized
I should probably point out that I somehow sent this patch series and did not
realize I did so in the middle of a rebase, and as such completely forgot the
parts here that actually started using these helpers in nouveau. lol....

anyway-will fix when I sent out the respin today

On Fri, 2021-02-05 at 18:45 -0500, Lyude Paul wrote:
> This series:
> * Cleans up i915's DPCD backlight code a little bit
> * Extracts i915's DPCD backlight code into a set of shared DRM helpers
> * Starts using those helpers in nouveau to add support to nouveau for
>   DPCD backlight control
> 
> v2 series-wide changes:
> * Rebase
> v3 series-wide changes:
> * Split up the changes to intel's backlight code into separate patches
> 
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Dave Airlie <airlied at gmail.com>
> Cc: greg.depoire at gmail.com
> 
> Lyude Paul (10):
>   drm/nouveau/kms/nv40-/backlight: Assign prop type once
>   drm/nouveau/kms: Don't probe eDP connectors more then once
>   drm/i915/dpcd_bl: Remove redundant AUX backlight frequency
>     calculations
>   drm/i915/dpcd_bl: Handle drm_dpcd_read/write() return values correctly
>   drm/i915/dpcd_bl: Cleanup intel_dp_aux_vesa_enable_backlight() a bit
>   drm/i915/dpcd_bl: Cache some backlight capabilities in
>     intel_panel.backlight
>   drm/i915/dpcd_bl: Move VESA backlight enabling code closer together
>   drm/i915/dpcd_bl: Return early in vesa_calc_max_backlight if we can't
>     read PWMGEN_BIT_COUNT
>   drm/i915/dpcd_bl: Print return codes for VESA backlight failures
>   drm/dp: Extract i915's eDP backlight code into DRM helpers
> 
>  drivers/gpu/drm/drm_dp_helper.c               | 332 ++++++++++++++++++
>  .../drm/i915/display/intel_display_types.h    |   2 +-
>  .../drm/i915/display/intel_dp_aux_backlight.c | 329 +++--------------
>  drivers/gpu/drm/nouveau/nouveau_backlight.c   |   4 +-
>  drivers/gpu/drm/nouveau/nouveau_connector.c   |   6 +
>  include/drm/drm_dp_helper.h                   |  48 +++
>  6 files changed, 428 insertions(+), 293 deletions(-)
> 

-- 
Sincerely,
   Lyude Paul (she/her)
   Software Engineer at Red Hat
   
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