[PATCH v6 40/44] drm/colorop: Define LUT_1D interpolation
Harry Wentland
harry.wentland at amd.com
Thu Oct 3 20:01:22 UTC 2024
We want to make sure userspace is aware of the 1D LUT
interpolation. While linear interpolation is common it
might not be supported on all HW. Give driver implementers
a way to specify their interpolation.
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
.../amd/display/amdgpu_dm/amdgpu_dm_colorop.c | 6 ++--
drivers/gpu/drm/drm_atomic.c | 1 +
drivers/gpu/drm/drm_colorop.c | 36 ++++++++++++++++++-
include/drm/drm_colorop.h | 19 +++++++++-
include/uapi/drm/drm_mode.h | 13 +++++++
5 files changed, 71 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_colorop.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_colorop.c
index df82fb14f8ca..f0f7ef6b52a9 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_colorop.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_colorop.c
@@ -131,7 +131,8 @@ int amdgpu_dm_initialize_default_pipeline(struct drm_plane *plane, struct drm_pr
goto cleanup;
}
- ret = drm_colorop_curve_1d_lut_init(dev, ops[i], plane, MAX_COLOR_LUT_ENTRIES);
+ ret = drm_colorop_curve_1d_lut_init(dev, ops[i], plane, MAX_COLOR_LUT_ENTRIES,
+ DRM_COLOROP_LUT1D_INTERPOLATION_LINEAR);
if (ret)
goto cleanup;
@@ -163,7 +164,8 @@ int amdgpu_dm_initialize_default_pipeline(struct drm_plane *plane, struct drm_pr
goto cleanup;
}
- ret = drm_colorop_curve_1d_lut_init(dev, ops[i], plane, MAX_COLOR_LUT_ENTRIES);
+ ret = drm_colorop_curve_1d_lut_init(dev, ops[i], plane, MAX_COLOR_LUT_ENTRIES,
+ DRM_COLOROP_LUT1D_INTERPOLATION_LINEAR);
if (ret)
goto cleanup;
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index acd8a2fc0270..e492a06c3a6b 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -795,6 +795,7 @@ static void drm_atomic_colorop_print_state(struct drm_printer *p,
break;
case DRM_COLOROP_1D_LUT:
drm_printf(p, "\tsize=%d\n", state->size);
+ drm_printf(p, "\tinterpolation=%s\n", drm_get_colorop_lut1d_interpolation_name(colorop->lut1d_interpolation));
drm_printf(p, "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
break;
case DRM_COLOROP_CTM_3X4:
diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
index 41f0ade76b57..3ad3e22d37c2 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c
@@ -77,6 +77,9 @@ static const char * const colorop_curve_1d_type_names[] = {
[DRM_COLOROP_1D_CURVE_PQ_125_INV_EOTF] = "PQ 125 Inverse EOTF",
};
+static const struct drm_prop_enum_list drm_colorop_lut1d_interpolation_list[] = {
+ { DRM_COLOROP_LUT1D_INTERPOLATION_LINEAR, "Linear" },
+};
/* Init Helpers */
@@ -233,10 +236,12 @@ static int drm_colorop_create_data_prop(struct drm_device *dev, struct drm_color
* @colorop: The drm_colorop object to initialize
* @plane: The associated drm_plane
* @lut_size: LUT size supported by driver
+ * @lut1d_interpolation: 1D LUT interpolation type
* @return zero on success, -E value on failure
*/
int drm_colorop_curve_1d_lut_init(struct drm_device *dev, struct drm_colorop *colorop,
- struct drm_plane *plane, uint32_t lut_size)
+ struct drm_plane *plane, uint32_t lut_size,
+ enum drm_colorop_lut1d_interpolation_type lut1d_interpolation)
{
struct drm_property *prop;
int ret;
@@ -255,6 +260,17 @@ int drm_colorop_curve_1d_lut_init(struct drm_device *dev, struct drm_colorop *co
colorop->size_property = prop;
drm_object_attach_property(&colorop->base, colorop->size_property, lut_size);
+ /* Interpolation */
+ prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "LUT1D_INTERPOLATION",
+ drm_colorop_lut1d_interpolation_list,
+ ARRAY_SIZE(drm_colorop_lut1d_interpolation_list));
+ if (!prop)
+ return -ENOMEM;
+
+ colorop->lut1d_interpolation_property = prop;
+ drm_object_attach_property(&colorop->base, prop, lut1d_interpolation);
+ colorop->lut1d_interpolation = lut1d_interpolation;
+
/* data */
ret = drm_colorop_create_data_prop(dev, colorop);
if (ret)
@@ -410,6 +426,9 @@ static const char * const colorop_type_name[] = {
[DRM_COLOROP_CTM_3X4] = "3x4 Matrix",
[DRM_COLOROP_MULTIPLIER] = "Multiplier",
};
+static const char * const colorop_lut1d_interpolation_name[] = {
+ [DRM_COLOROP_LUT1D_INTERPOLATION_LINEAR] = "Linear",
+};
const char *drm_get_colorop_type_name(enum drm_colorop_type type)
{
@@ -427,6 +446,21 @@ const char *drm_get_colorop_curve_1d_type_name(enum drm_colorop_curve_1d_type ty
return colorop_curve_1d_type_names[type];
}
+/**
+ * drm_get_colorop_lut1d_interpolation_name: return a string for interpolation type
+ * @type: interpolation type to compute name of
+ *
+ * In contrast to the other drm_get_*_name functions this one here returns a
+ * const pointer and hence is threadsafe.
+ */
+const char *drm_get_colorop_lut1d_interpolation_name(enum drm_colorop_lut1d_interpolation_type type)
+{
+ if (WARN_ON(type >= ARRAY_SIZE(colorop_lut1d_interpolation_name)))
+ return "unknown";
+
+ return colorop_lut1d_interpolation_name[type];
+}
+
/**
* drm_colorop_set_next_property - sets the next pointer
* @colorop: drm colorop
diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index f78ef745887c..d3a00296973d 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -252,6 +252,21 @@ struct drm_colorop {
*/
struct drm_property *bypass_property;
+ /**
+ * @lut1d_interpolation:
+ *
+ * Read-only
+ * Interpolation for DRM_COLOROP_1D_LUT
+ */
+ enum drm_colorop_lut1d_interpolation_type lut1d_interpolation;
+
+ /**
+ * @lut1d_interpolation_property:
+ *
+ * Read-only property for DRM_COLOROP_1D_LUT interpolation
+ */
+ struct drm_property *lut1d_interpolation_property;
+
/**
* @curve_1d_type_property:
*
@@ -320,7 +335,8 @@ static inline struct drm_colorop *drm_colorop_find(struct drm_device *dev,
int drm_colorop_curve_1d_init(struct drm_device *dev, struct drm_colorop *colorop,
struct drm_plane *plane, u64 supported_tfs);
int drm_colorop_curve_1d_lut_init(struct drm_device *dev, struct drm_colorop *colorop,
- struct drm_plane *plane, uint32_t lut_size);
+ struct drm_plane *plane, uint32_t lut_size,
+ enum drm_colorop_lut1d_interpolation_type lut1d_interpolation);
int drm_colorop_ctm_3x4_init(struct drm_device *dev, struct drm_colorop *colorop,
struct drm_plane *plane);
int drm_colorop_mult_init(struct drm_device *dev, struct drm_colorop *colorop,
@@ -374,6 +390,7 @@ const char *drm_get_colorop_type_name(enum drm_colorop_type type);
* const pointer and hence is threadsafe.
*/
const char *drm_get_colorop_curve_1d_type_name(enum drm_colorop_curve_1d_type type);
+const char *drm_get_colorop_lut1d_interpolation_name(enum drm_colorop_lut1d_interpolation_type type);
void drm_colorop_set_next_property(struct drm_colorop *colorop, struct drm_colorop *next);
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 96cb32e6980c..5ef87cb5b242 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -915,6 +915,19 @@ enum drm_colorop_type {
DRM_COLOROP_MULTIPLIER,
};
+/**
+ * enum drm_colorop_lut1d_interpolation_type - type of interpolation for 1D LUTs
+ */
+enum drm_colorop_lut1d_interpolation_type {
+ /**
+ * @DRM_COLOROP_LUT1D_INTERPOLATION_LINEAR:
+ *
+ * Linear interpolation. Values between points of the LUT will be
+ * linearly interpolated.
+ */
+ DRM_COLOROP_LUT1D_INTERPOLATION_LINEAR,
+};
+
/**
* struct drm_plane_size_hint - Plane size hints
* @width: The width of the plane in pixel
--
2.46.2
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