[RFC v1 0/3] drm/i915: Add support for XRandR Border property

[Vivek Kasireddy]

Some customers and users have expressed interest in adding borders
(or margins) to certain displays in their multi-display configurations.
To address this need, this patchset implements the XRandR Border
property as defined here:
https://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt#n2032

---

Patchset overview:

Patch 1: Create skl_program_crtc_scaler() to program scaler for crtc
Patch 2: Create and attach the Border property to DP and HDMI
Patch 3: Implement Border property by enabling crtc scalar

This series is tested using following method:
- Run the following xrandr command with different parameters:
xrandr --output HDMI-3 --pos 1920x0 --mode 1280x1024 --fb 3840x2160 --scale 2.11x2.11 --set "Border" 150,0,150,0

The following patch was also added to the modesetting driver to
implement the Border property:
https://gitlab.freedesktop.org/Vivek/xserver/-/commit/62abfc438f0d17fe7f88bf2826c9784c2b36443b

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Dongwon Kim <dongwon.kim at intel.com>

Vivek Kasireddy (3):
  drm/i915: Rename skl_pfit_enable() to skl_program_crtc_scaler()
  drm/i915: Attach the Border property to DP and HDMI connectors
  drm/i915: Apply border adjustments and enable scaler on the crtc

 drivers/gpu/drm/i915/display/intel_atomic.c   | 29 ++++++++++-
 .../gpu/drm/i915/display/intel_connector.c    | 49 +++++++++++++++++++
 .../gpu/drm/i915/display/intel_connector.h    |  3 ++
 drivers/gpu/drm/i915/display/intel_display.c  | 25 ++++++++--
 .../gpu/drm/i915/display/intel_display_core.h |  1 +
 .../drm/i915/display/intel_display_types.h    |  6 +++
 drivers/gpu/drm/i915/display/intel_dp.c       | 11 +++++
 drivers/gpu/drm/i915/display/intel_hdmi.c     | 11 +++++
 drivers/gpu/drm/i915/display/skl_scaler.c     | 27 ++++++----
 drivers/gpu/drm/i915/display/skl_scaler.h     |  3 +-
 10 files changed, 149 insertions(+), 16 deletions(-)

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2.43.0