[PATCH v2 0/4] drm: zynqmp: Make the video plane primary

Sean Anderson sean.anderson at linux.dev
Tue Jan 6 08:42:43 PST 2026


The graphics plane does not support XRGB8888, which is the default mode
X uses for 24-bit color. Because of this, X must be set to use 16-bit
color, which has a measurable performance penalty. Make the video plane
the primary plane as it natively supports XRGB8888. An alternative
approach to add XRGB8888 to the graphics plane is discussed in [1], as
well as in patch 2.

[1] https://lore.kernel.org/dri-devel/20250627145058.6880-1-mike.looijmans@topic.nl/

Changes in v2:
- Allow specifying blend mode default
- Advertise coverage instead of premulti, since that's what the hardware
  supports.
- Set default blend mode to none since that's what the default was
  before this series.

Sean Anderson (4):
  drm/drm_blend: Allow specifying blend mode default
  drm: zynqmp: Check property creation status
  drm: zynqmp: Make the video plane primary
  drm: zynqmp: Add blend mode property to graphics plane

 drivers/gpu/drm/drm_blend.c       | 22 ++++++-------
 drivers/gpu/drm/xlnx/zynqmp_kms.c | 53 +++++++++++++++++++++++++------
 include/drm/drm_blend.h           | 26 +++++++++++++--
 3 files changed, 78 insertions(+), 23 deletions(-)

-- 
2.35.1.1320.gc452695387.dirty




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