[PATCH v3 0/9] drm/i915: Add support for Intel's eDP backlight controls

[Jani Nikula]

On Fri, 04 Dec 2020, Lyude Paul <lyude at redhat.com> wrote:
> A while ago we ran into issues while trying to enable the eDP backlight
> control interface as defined by VESA, in order to make the DPCD
> backlight controls on newer laptop panels work. The issue ended up being
> much more complicated however, as we also apparently needed to add
> support for an Intel-specific DPCD backlight control interface as the
> VESA interface is broken on many laptop panels. For lack of a better
> name, we just call this the Intel HDR backlight interface.
>
> While this only adds support for the SDR backlight mode (I think), this
> will fix a lot of user's laptop panels that we weren't able to properly
> automatically detect DPCD backlight controls on previously.
>
> Series-wide changes in v3:
> * Pass down brightness values to enable/disable backlight callbacks in a
>   separate patch
> * Rebase
>
> Lyude Paul (9):
>   drm/i915/dp: Program source OUI on eDP panels
>   drm/i915: Rename pwm_* backlight callbacks to ext_pwm_*
>   drm/i915: Pass down brightness values to enable/disable backlight
>     callbacks
>   drm/i915/dp: Rename eDP VESA backlight interface functions
>   drm/i915/dp: Add register definitions for Intel HDR backlight
>     interface

Pushed the above patches to din to move things forward, thanks for the
patches.

Still looking at the below.

BR,
Jani.


>   drm/i915: Keep track of pwm-related backlight hooks separately
>   drm/i915/dp: Enable Intel's HDR backlight interface (only SDR for now)
>   drm/i915/dp: Allow forcing specific interfaces through
>     enable_dpcd_backlight
>   drm/dp: Revert "drm/dp: Introduce EDID-based quirks"
>
>  drivers/gpu/drm/drm_dp_helper.c               |  83 +---
>  drivers/gpu/drm/drm_dp_mst_topology.c         |   3 +-
>  .../drm/i915/display/intel_display_types.h    |  18 +-
>  drivers/gpu/drm/i915/display/intel_dp.c       |  42 +-
>  .../drm/i915/display/intel_dp_aux_backlight.c | 394 +++++++++++++---
>  drivers/gpu/drm/i915/display/intel_dp_mst.c   |   3 +-
>  .../i915/display/intel_dsi_dcs_backlight.c    |   7 +-
>  drivers/gpu/drm/i915/display/intel_panel.c    | 435 ++++++++++--------
>  drivers/gpu/drm/i915/display/intel_panel.h    |   4 +
>  drivers/gpu/drm/i915/display/intel_psr.c      |   2 +-
>  drivers/gpu/drm/i915/i915_params.c            |   2 +-
>  include/drm/drm_dp_helper.h                   |  21 +-
>  12 files changed, 655 insertions(+), 359 deletions(-)

-- 
Jani Nikula, Intel Open Source Graphics Center