[RFC PATCH 16/40] drm/amd/display: add plane blend LUT and TF driver-private properties
Melissa Wen
mwen at igalia.com
Sun Apr 23 14:10:28 UTC 2023
From: Joshua Ashton <joshua at froggi.es>
Blend 1D LUT or a predefined transfer function can be set to linearize
content before blending, so that it's positioned just before blending
planes, and after 3D LUT (non-linear space). Shaper and Blend LUTs are
1D LUTs that sandwich 3D LUT. Drivers should advertize blend properties
according to HW caps.
Signed-off-by: Joshua Ashton <joshua at froggi.es>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 23 +++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 18 ++++++++++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 12 +++++++
.../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 34 +++++++++++++++++++
4 files changed, 87 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 2bf8b19feae4..0bcf0bc6baff 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -1369,6 +1369,29 @@ amdgpu_display_create_color_properties(struct amdgpu_device *adev)
return -ENOMEM;
adev->mode_info.plane_lut3d_size_property = prop;
+ prop = drm_property_create(adev_to_drm(adev),
+ DRM_MODE_PROP_BLOB,
+ "AMD_PLANE_BLEND_LUT", 0);
+ if (!prop)
+ return -ENOMEM;
+ adev->mode_info.plane_blend_lut_property = prop;
+
+ prop = drm_property_create_range(adev_to_drm(adev),
+ DRM_MODE_PROP_IMMUTABLE,
+ "AMD_PLANE_BLEND_LUT_SIZE", 0, UINT_MAX);
+ if (!prop)
+ return -ENOMEM;
+ adev->mode_info.plane_blend_lut_size_property = prop;
+
+ prop = drm_property_create_enum(adev_to_drm(adev),
+ DRM_MODE_PROP_ENUM,
+ "AMD_PLANE_BLEND_TF",
+ drm_transfer_function_enum_list,
+ ARRAY_SIZE(drm_transfer_function_enum_list));
+ if (!prop)
+ return -ENOMEM;
+ adev->mode_info.plane_blend_tf_property = prop;
+
return 0;
}
#endif
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 17c7669ad9ab..f640dbd53b8c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -417,6 +417,24 @@ struct amdgpu_mode_info {
* size of 3D LUT as supported by the driver (read-only).
*/
struct drm_property *plane_lut3d_size_property;
+ /**
+ * @plane_blend_lut_property: Plane property for output gamma before
+ * blending. Userspace set a blend LUT to convert colors after 3D LUT
+ * conversion. It works as a post-3D LUT 1D LUT, with shaper LUT, they
+ * are sandwiching 3D LUT with two 1D LUT.
+ */
+ struct drm_property *plane_blend_lut_property;
+ /**
+ * @plane_blend_lut_size_property: Plane property to define the max
+ * size of blend LUT as supported by the driver (read-only).
+ */
+ struct drm_property *plane_blend_lut_size_property;
+ /**
+ * @plane_blend_tf_property: Plane property to set a predefined
+ * transfer function for pre-blending blend (before applying 3D LUT)
+ * with or without LUT.
+ */
+ struct drm_property *plane_blend_tf_property;
#endif
};
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 8a425e7a7e89..54121c3fa040 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -764,6 +764,18 @@ struct dm_plane_state {
* &struct drm_color_lut.
*/
struct drm_property_blob *lut3d;
+ /**
+ * @blend_lut: blend lut lookup table blob. The blob (if not NULL) is an
+ * array of &struct drm_color_lut.
+ */
+ struct drm_property_blob *blend_lut;
+ /**
+ * @blend_tf:
+ *
+ * Pre-defined transfer function for converting plane pixel data before
+ * applying blend LUT.
+ */
+ enum drm_transfer_function blend_tf;
#endif
};
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index e4f28fbf6613..cdbd11f3be20 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1325,6 +1325,7 @@ static void dm_drm_plane_reset(struct drm_plane *plane)
amdgpu_state->degamma_tf = DRM_TRANSFER_FUNCTION_DEFAULT;
amdgpu_state->hdr_mult = AMDGPU_HDR_MULT_DEFAULT;
amdgpu_state->shaper_tf = DRM_TRANSFER_FUNCTION_DEFAULT;
+ amdgpu_state->blend_tf = DRM_TRANSFER_FUNCTION_DEFAULT;
}
#endif
}
@@ -1352,6 +1353,8 @@ dm_drm_plane_duplicate_state(struct drm_plane *plane)
drm_property_blob_get(dm_plane_state->shaper_lut);
if (dm_plane_state->lut3d)
drm_property_blob_get(dm_plane_state->lut3d);
+ if (dm_plane_state->blend_lut)
+ drm_property_blob_get(dm_plane_state->blend_lut);
#endif
return &dm_plane_state->base;
@@ -1424,6 +1427,7 @@ static void dm_drm_plane_destroy_state(struct drm_plane *plane,
drm_property_blob_put(dm_plane_state->degamma_lut);
drm_property_blob_put(dm_plane_state->shaper_lut);
drm_property_blob_put(dm_plane_state->lut3d);
+ drm_property_blob_put(dm_plane_state->blend_lut);
#endif
if (dm_plane_state->dc_state)
@@ -1513,6 +1517,17 @@ dm_plane_attach_color_mgmt_properties(struct amdgpu_display_manager *dm,
dm->adev->mode_info.plane_lut3d_size_property,
MAX_COLOR_3DLUT_ENTRIES);
}
+
+ if (dm->dc->caps.color.dpp.ogam_ram) {
+ drm_object_attach_property(&plane->base,
+ dm->adev->mode_info.plane_blend_lut_property, 0);
+ drm_object_attach_property(&plane->base,
+ dm->adev->mode_info.plane_blend_lut_size_property,
+ MAX_COLOR_LUT_ENTRIES);
+ drm_object_attach_property(&plane->base,
+ dm->adev->mode_info.plane_blend_tf_property,
+ DRM_TRANSFER_FUNCTION_DEFAULT);
+ }
}
static int
@@ -1564,6 +1579,19 @@ dm_atomic_plane_set_property(struct drm_plane *plane,
&replaced);
dm_plane_state->base.color_mgmt_changed |= replaced;
return ret;
+ } else if (property == adev->mode_info.plane_blend_lut_property) {
+ ret = amdgpu_dm_replace_property_blob_from_id(plane->dev,
+ &dm_plane_state->blend_lut,
+ val,
+ -1, sizeof(struct drm_color_lut),
+ &replaced);
+ dm_plane_state->base.color_mgmt_changed |= replaced;
+ return ret;
+ } else if (property == adev->mode_info.plane_blend_tf_property) {
+ if (dm_plane_state->blend_tf != val) {
+ dm_plane_state->blend_tf = val;
+ dm_plane_state->base.color_mgmt_changed = 1;
+ }
} else {
drm_dbg_atomic(plane->dev,
"[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n",
@@ -1600,6 +1628,12 @@ dm_atomic_plane_get_property(struct drm_plane *plane,
} else if (property == adev->mode_info.plane_lut3d_property) {
*val = (dm_plane_state->lut3d) ?
dm_plane_state->lut3d->base.id : 0;
+ } else if (property == adev->mode_info.plane_blend_lut_property) {
+ *val = (dm_plane_state->blend_lut) ?
+ dm_plane_state->blend_lut->base.id : 0;
+ } else if (property == adev->mode_info.plane_blend_tf_property) {
+ *val = dm_plane_state->blend_tf;
+
} else {
return -EINVAL;
}
--
2.39.2
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