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drm/colorop: Add 1D Curve Custom LUT type

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We've previously introduced DRM_COLOROP_1D_CURVE for
pre-defined 1D curves. But we also have HW that supports
custom curves and userspace needs the ability to pass
custom curves, aka LUTs.

This patch introduces a new colorop type, called
DRM_COLOROP_1D_LUT that provides a SIZE property which
is used by a driver to advertise the supported SIZE
of the LUT, as well as a DATA property which userspace
uses to set the LUT.

DATA and size function in the same way as current drm_crtc
GAMMA and DEGAMMA LUTs.

Reviewed-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Co-developed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patch.msgid.link/20251115000237.3561250-38-alex.hung@amd.com
This commit is contained in:
Alex Hung
2025-11-14 17:02:02 -07:00
committed by Simon Ser
parent 9452977513
commit 99a4e4f08a
5 changed files with 82 additions and 0 deletions
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5
drivers/gpu/drm/drm_atomic_uapi.c
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@@ -699,6 +699,9 @@ static int drm_atomic_color_set_data_property(struct drm_colorop *colorop,
bool replaced = false;
switch (colorop->type) {
case DRM_COLOROP_1D_LUT:
size = colorop->size * sizeof(struct drm_color_lut32);
break;
case DRM_COLOROP_CTM_3X4:
size = sizeof(struct drm_color_ctm_3x4);
break;
@@ -750,6 +753,8 @@ drm_atomic_colorop_get_property(struct drm_colorop *colorop,
*val = state->bypass;
else if (property == colorop->curve_1d_type_property)
*val = state->curve_1d_type;
else if (property == colorop->size_property)
*val = colorop->size;
else if (property == colorop->data_property)
*val = (state->data) ? state->data->base.id : 0;
else