[Intel-gfx] [PATCH 0/2] CRTC background color

[Matt Roper]

Some display controllers can be programmed to present non-black colors
for pixels not covered by any plane (or pixels covered by the
transparent regions of higher planes).  Compositors that want a UI with
a solid color background can potentially save memory bandwidth by
setting the CRTC background property and using smaller planes to display
the rest of the content.

Earlier versions of these patches were floated on dri-devel about 2.5
years ago, but at that time the only userspace software that made use of
this was closed-source (product-specific Wayland compositors), so we
never landed the patches upstream.  I'm told that there's now some
renewed interest in this functionality from both the ChromeOS camp and
the Weston camp, so I'm re-posting updated kernel patches here to get
the ball rolling again.  As always, we'll still need the patches for at
least one of those projects to get posted (and reviewed) somewhere
public before we actually merge these kernel patches.

Cc: dri-devel at lists.freedesktop.org
Cc: wei.c.li at intel.com
Cc: harish.krupo.kps at intel.com

Matt Roper (2):
  drm: Add CRTC background color property
  drm/i915/gen9+: Add support for pipe background color

 drivers/gpu/drm/drm_atomic_state_helper.c |  1 +
 drivers/gpu/drm/drm_atomic_uapi.c         |  5 +++++
 drivers/gpu/drm/drm_mode_config.c         |  6 ++++++
 drivers/gpu/drm/i915/i915_debugfs.c       |  9 ++++++++
 drivers/gpu/drm/i915/i915_reg.h           |  6 ++++++
 drivers/gpu/drm/i915/intel_display.c      | 34 +++++++++++++++++++++++++++++++
 include/drm/drm_crtc.h                    | 17 ++++++++++++++++
 include/drm/drm_mode_config.h             |  5 +++++
 include/uapi/drm/drm_mode.h               | 26 +++++++++++++++++++++++
 9 files changed, 109 insertions(+)

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2.14.4