[PATCH v2 06/34] drm/amd/display: add plane degamma TF driver-specific property
From: Melissa Wen
Date: Thu Aug 10 2023 - 12:04:06 EST
From: Joshua Ashton <joshua@xxxxxxxxx>
Allow userspace to tell the kernel driver the input space and,
therefore, uses correct predefined transfer function (TF) to delinearize
content with or without LUT.
v2:
- rename TF enum prefix from DRM_ to AMDGPU_ (Harry)
- remove HLG TF
Signed-off-by: Joshua Ashton <joshua@xxxxxxxxx>
Co-developed-by: Melissa Wen <mwen@xxxxxxxxxx>
Signed-off-by: Melissa Wen <mwen@xxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 5 +++++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 19 +++++++++++++++++
.../amd/display/amdgpu_dm/amdgpu_dm_color.c | 21 +++++++++++++++++++
.../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 19 +++++++++++++++--
4 files changed, 62 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index ec4621deac8c..6ef958a14e16 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -354,6 +354,11 @@ struct amdgpu_mode_info {
* size of degamma LUT as supported by the driver (read-only).
*/
struct drm_property *plane_degamma_lut_size_property;
+ /**
+ * @plane_degamma_tf_property: Plane pre-defined transfer function to
+ * to go from scanout/encoded values to linear values.
+ */
+ struct drm_property *plane_degamma_tf_property;
};
#define AMDGPU_MAX_BL_LEVEL 0xFF
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 f0343bbf0fe1..c749c9cb3d94 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -716,6 +716,18 @@ static inline void amdgpu_dm_set_mst_status(uint8_t *status,
extern const struct amdgpu_ip_block_version dm_ip_block;
+enum amdgpu_transfer_function {
+ AMDGPU_TRANSFER_FUNCTION_DEFAULT,
+ AMDGPU_TRANSFER_FUNCTION_SRGB,
+ AMDGPU_TRANSFER_FUNCTION_BT709,
+ AMDGPU_TRANSFER_FUNCTION_PQ,
+ AMDGPU_TRANSFER_FUNCTION_LINEAR,
+ AMDGPU_TRANSFER_FUNCTION_UNITY,
+ AMDGPU_TRANSFER_FUNCTION_GAMMA22,
+ AMDGPU_TRANSFER_FUNCTION_GAMMA24,
+ AMDGPU_TRANSFER_FUNCTION_GAMMA26,
+};
+
struct dm_plane_state {
struct drm_plane_state base;
struct dc_plane_state *dc_state;
@@ -729,6 +741,13 @@ struct dm_plane_state {
* The blob (if not NULL) is an array of &struct drm_color_lut.
*/
struct drm_property_blob *degamma_lut;
+ /**
+ * @degamma_tf:
+ *
+ * Predefined transfer function to tell DC driver the input space to
+ * linearize.
+ */
+ enum amdgpu_transfer_function degamma_tf;
};
struct dm_crtc_state {
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
index cf175b86ba80..56ce008b9095 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
@@ -85,6 +85,18 @@ void amdgpu_dm_init_color_mod(void)
}
#ifdef AMD_PRIVATE_COLOR
+static const struct drm_prop_enum_list amdgpu_transfer_function_enum_list[] = {
+ { AMDGPU_TRANSFER_FUNCTION_DEFAULT, "Default" },
+ { AMDGPU_TRANSFER_FUNCTION_SRGB, "sRGB" },
+ { AMDGPU_TRANSFER_FUNCTION_BT709, "BT.709" },
+ { AMDGPU_TRANSFER_FUNCTION_PQ, "PQ (Perceptual Quantizer)" },
+ { AMDGPU_TRANSFER_FUNCTION_LINEAR, "Linear" },
+ { AMDGPU_TRANSFER_FUNCTION_UNITY, "Unity" },
+ { AMDGPU_TRANSFER_FUNCTION_GAMMA22, "Gamma 2.2" },
+ { AMDGPU_TRANSFER_FUNCTION_GAMMA24, "Gamma 2.4" },
+ { AMDGPU_TRANSFER_FUNCTION_GAMMA26, "Gamma 2.6" },
+};
+
int
amdgpu_dm_create_color_properties(struct amdgpu_device *adev)
{
@@ -104,6 +116,15 @@ amdgpu_dm_create_color_properties(struct amdgpu_device *adev)
return -ENOMEM;
adev->mode_info.plane_degamma_lut_size_property = prop;
+ prop = drm_property_create_enum(adev_to_drm(adev),
+ DRM_MODE_PROP_ENUM,
+ "AMD_PLANE_DEGAMMA_TF",
+ amdgpu_transfer_function_enum_list,
+ ARRAY_SIZE(amdgpu_transfer_function_enum_list));
+ if (!prop)
+ return -ENOMEM;
+ adev->mode_info.plane_degamma_tf_property = prop;
+
return 0;
}
#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 488012d1558d..0a955abb1abf 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
@@ -1326,8 +1326,11 @@ static void dm_drm_plane_reset(struct drm_plane *plane)
amdgpu_state = kzalloc(sizeof(*amdgpu_state), GFP_KERNEL);
WARN_ON(amdgpu_state == NULL);
- if (amdgpu_state)
- __drm_atomic_helper_plane_reset(plane, &amdgpu_state->base);
+ if (!amdgpu_state)
+ return;
+
+ __drm_atomic_helper_plane_reset(plane, &amdgpu_state->base);
+ amdgpu_state->degamma_tf = AMDGPU_TRANSFER_FUNCTION_DEFAULT;
}
static struct drm_plane_state *
@@ -1350,6 +1353,8 @@ dm_drm_plane_duplicate_state(struct drm_plane *plane)
if (dm_plane_state->degamma_lut)
drm_property_blob_get(dm_plane_state->degamma_lut);
+ dm_plane_state->degamma_tf = old_dm_plane_state->degamma_tf;
+
return &dm_plane_state->base;
}
@@ -1441,6 +1446,9 @@ dm_atomic_plane_attach_color_mgmt_properties(struct amdgpu_display_manager *dm,
drm_object_attach_property(&plane->base,
mode_info.plane_degamma_lut_size_property,
MAX_COLOR_LUT_ENTRIES);
+ drm_object_attach_property(&plane->base,
+ dm->adev->mode_info.plane_degamma_tf_property,
+ AMDGPU_TRANSFER_FUNCTION_DEFAULT);
}
}
@@ -1463,6 +1471,11 @@ 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_degamma_tf_property) {
+ if (dm_plane_state->degamma_tf != val) {
+ dm_plane_state->degamma_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",
@@ -1486,6 +1499,8 @@ dm_atomic_plane_get_property(struct drm_plane *plane,
if (property == adev->mode_info.plane_degamma_lut_property) {
*val = (dm_plane_state->degamma_lut) ?
dm_plane_state->degamma_lut->base.id : 0;
+ } else if (property == adev->mode_info.plane_degamma_tf_property) {
+ *val = dm_plane_state->degamma_tf;
} else {
return -EINVAL;
}
--
2.40.1