drm/i915: Avoid programming color HW blocks for NV12 Y planes

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link_nv12_planes() currently copies the full UV plane hw state to
the Y plane. This includes the color pipeline blobs (ctm, degamma_lut,
gamma_lut, lut_3d) which is incorrect as we don't need to program these
HW blocks for Y plane.

This is harmless currently as the color pipeline uapi does not support
YUV (both packed and planar) formats but that can change in the future.

Add a new static helper intel_plane_y_copy_hw_state() that copies only
the rendering parameters a Y plane actually needs, leaving all color
pipeline blobs unset. Remove the helper intel_plane_copy_hw_state() as
there are no users for it.

v2:
- drop the extra spaces before ='s (Jani)

Cc: Jani Nikula <jani.nikula@intel.com>
Assisted-by: GitHub-Copilot:Claude-Sonnet-4.6
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patch.msgid.link/20260601082953.128539-3-chaitanya.kumar.borah@intel.com

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This commit is contained in:

Chaitanya Kumar Borah 2026-06-01 13:59:52 +05:30 • committed by Uma Shankar

parent 9ba383c240

commit dfd604b259

2 changed files with 14 additions and 10 deletions

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22

drivers/gpu/drm/i915/display/intel_plane.c

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2

drivers/gpu/drm/i915/display/intel_plane.h

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