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 <cont...@emersion.fr> Signed-off-by: Alex Hung <alex.h...@amd.com> Co-developed-by: Harry Wentland <harry.wentl...@amd.com> Signed-off-by: Harry Wentland <harry.wentl...@amd.com> Reviewed-by: Daniel Stone <dani...@collabora.com> --- V10: - 1D LUT API is now using 32BIT RGB with drm_color_lut_32 (Uma Shankar) V9: - Update function names by _plane_ (Chaitanya Kumar Borah) v8: - Add DRM_MODE_PROP_ATOMIC to drm_property_create_range (Simon Ser) - Change "1D Curve Custom LUT" to "1D LUT" (Simon Ser) v7: - Change "size" to "lut_size" (this affects multiple following commits) - Move "lut_size" from drm_colorop_state to drm_colorop - Modify other files accordingly (i.e. from drm_colorop_state->size to drm_colorop->lut_size) v5: - Add kernel doc - Define SIZE in similar manner to GAMMA_SIZE on drm_crtc (Melissa) drivers/gpu/drm/drm_atomic.c | 4 +++ drivers/gpu/drm/drm_atomic_uapi.c | 5 ++++ drivers/gpu/drm/drm_colorop.c | 43 +++++++++++++++++++++++++++++++ include/drm/drm_colorop.h | 16 ++++++++++++ include/uapi/drm/drm_mode.h | 14 ++++++++++ 5 files changed, 82 insertions(+) diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 809bd856d378..1dda90554e46 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -793,6 +793,10 @@ static void drm_atomic_colorop_print_state(struct drm_printer *p, drm_printf(p, "\tcurve_1d_type=%s\n", drm_get_colorop_curve_1d_type_name(state->curve_1d_type)); break; + case DRM_COLOROP_1D_LUT: + drm_printf(p, "\tsize=%d\n", colorop->lut_size); + drm_printf(p, "\tdata blob id=%d\n", state->data ? state->data->base.id : 0); + break; case DRM_COLOROP_CTM_3X4: drm_printf(p, "\tdata blob id=%d\n", state->data ? state->data->base.id : 0); break; diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c index 0de0fdd8af5b..6839363fa05e 100644 --- a/drivers/gpu/drm/drm_atomic_uapi.c +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -712,6 +712,9 @@ 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->lut_size * sizeof(struct drm_color_lut_32); + break; case DRM_COLOROP_CTM_3X4: size = sizeof(struct drm_color_ctm_3x4); break; @@ -761,6 +764,8 @@ 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->lut_size_property) { + *val = colorop->lut_size; } else if (property == colorop->data_property) { *val = (state->data) ? state->data->base.id : 0; } else { diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c index 3ae4a93f0200..6c87f5b9f7f9 100644 --- a/drivers/gpu/drm/drm_colorop.c +++ b/drivers/gpu/drm/drm_colorop.c @@ -64,6 +64,7 @@ static const struct drm_prop_enum_list drm_colorop_type_enum_list[] = { { DRM_COLOROP_1D_CURVE, "1D Curve" }, + { DRM_COLOROP_1D_LUT, "1D LUT" }, { DRM_COLOROP_CTM_3X4, "3x4 Matrix"}, }; @@ -266,6 +267,47 @@ static int drm_colorop_create_data_prop(struct drm_device *dev, struct drm_color return 0; } +/** + * drm_plane_colorop_curve_1d_lut_init - Initialize a DRM_COLOROP_1D_LUT + * + * @dev: DRM device + * @colorop: The drm_colorop object to initialize + * @plane: The associated drm_plane + * @lut_size: LUT size supported by driver + * @return zero on success, -E value on failure + */ +int drm_plane_colorop_curve_1d_lut_init(struct drm_device *dev, struct drm_colorop *colorop, + struct drm_plane *plane, uint32_t lut_size) +{ + struct drm_property *prop; + int ret; + + ret = drm_plane_colorop_init(dev, colorop, plane, DRM_COLOROP_1D_LUT); + if (ret) + return ret; + + /* initialize 1D LUT only attribute */ + /* LUT size */ + prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_ATOMIC, + "SIZE", 0, UINT_MAX); + if (!prop) + return -ENOMEM; + + colorop->lut_size_property = prop; + drm_object_attach_property(&colorop->base, colorop->lut_size_property, lut_size); + colorop->lut_size = lut_size; + + /* data */ + ret = drm_colorop_create_data_prop(dev, colorop); + if (ret) + return ret; + + drm_colorop_reset(colorop); + + return 0; +} +EXPORT_SYMBOL(drm_plane_colorop_curve_1d_lut_init); + int drm_plane_colorop_ctm_3x4_init(struct drm_device *dev, struct drm_colorop *colorop, struct drm_plane *plane) { @@ -374,6 +416,7 @@ void drm_colorop_reset(struct drm_colorop *colorop) static const char * const colorop_type_name[] = { [DRM_COLOROP_1D_CURVE] = "1D Curve", + [DRM_COLOROP_1D_LUT] = "1D LUT", [DRM_COLOROP_CTM_3X4] = "3x4 Matrix", }; diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h index 766caedea2f3..52e965577bd8 100644 --- a/include/drm/drm_colorop.h +++ b/include/drm/drm_colorop.h @@ -259,6 +259,13 @@ struct drm_colorop { */ struct drm_property *bypass_property; + /** + * @lut_size: + * + * Number of entries of the custom LUT. This should be read-only. + */ + uint32_t lut_size; + /** * @curve_1d_type_property: * @@ -266,6 +273,13 @@ struct drm_colorop { */ struct drm_property *curve_1d_type_property; + /** + * @lut_size_property: + * + * Size property for custom LUT from userspace. + */ + struct drm_property *lut_size_property; + /** * @data_property: * @@ -312,6 +326,8 @@ void drm_colorop_pipeline_destroy(struct drm_plane *plane); int drm_plane_colorop_curve_1d_init(struct drm_device *dev, struct drm_colorop *colorop, struct drm_plane *plane, u64 supported_tfs); +int drm_plane_colorop_curve_1d_lut_init(struct drm_device *dev, struct drm_colorop *colorop, + struct drm_plane *plane, uint32_t lut_size); int drm_plane_colorop_ctm_3x4_init(struct drm_device *dev, struct drm_colorop *colorop, struct drm_plane *plane); diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 21bd96f437e0..e522723e28c5 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -901,6 +901,20 @@ enum drm_colorop_type { */ DRM_COLOROP_1D_CURVE, + /** + * @DRM_COLOROP_1D_LUT: + * + * enum string "1D LUT" + * + * A simple 1D LUT of uniformly spaced &drm_color_lut_32 entries, + * packed into a blob via the DATA property. The driver's + * expected LUT size is advertised via the SIZE property. + * + * The DATA blob is an array of struct drm_color_lut_32 with size + * of "lut_size". + */ + DRM_COLOROP_1D_LUT, + /** * @DRM_COLOROP_CTM_3X4: * -- 2.43.0