[PATCH 06/36] drm/amd/display: add CRTC driver-specific property for gamma TF
Melissa Wen
mwen at igalia.com
Tue May 23 22:14:50 UTC 2023
Hook up driver-specific atomic operations for managing AMD color
properties and create AMD driver-specific color management properties
and attach them according to HW capabilities defined by `struct
dc_color_caps`. Add enumerated transfer function property to DRM CRTC
gamma to convert to wire encoding with or without a user gamma LUT.
Enumerated TFs are not supported yet by the DRM color pipeline,
therefore, create a DRM enum list with the predefined TFs supported by
the AMD display driver.
Co-developed-by: Joshua Ashton <joshua at froggi.es>
Signed-off-by: Joshua Ashton <joshua at froggi.es>
Signed-off-by: Melissa Wen <mwen at igalia.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 36 ++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 8 +++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 22 ++++++
.../amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 72 ++++++++++++++++++-
4 files changed, 137 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 389396eac222..88af075e6c18 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -1247,6 +1247,38 @@ amdgpu_display_user_framebuffer_create(struct drm_device *dev,
return &amdgpu_fb->base;
}
+static const struct drm_prop_enum_list drm_transfer_function_enum_list[] = {
+ { DRM_TRANSFER_FUNCTION_DEFAULT, "Default" },
+ { DRM_TRANSFER_FUNCTION_SRGB, "sRGB" },
+ { DRM_TRANSFER_FUNCTION_BT709, "BT.709" },
+ { DRM_TRANSFER_FUNCTION_PQ, "PQ (Perceptual Quantizer)" },
+ { DRM_TRANSFER_FUNCTION_LINEAR, "Linear" },
+ { DRM_TRANSFER_FUNCTION_UNITY, "Unity" },
+ { DRM_TRANSFER_FUNCTION_HLG, "HLG (Hybrid Log Gamma)" },
+ { DRM_TRANSFER_FUNCTION_GAMMA22, "Gamma 2.2" },
+ { DRM_TRANSFER_FUNCTION_GAMMA24, "Gamma 2.4" },
+ { DRM_TRANSFER_FUNCTION_GAMMA26, "Gamma 2.6" },
+};
+
+#ifdef AMD_PRIVATE_COLOR
+static int
+amdgpu_display_create_color_properties(struct amdgpu_device *adev)
+{
+ struct drm_property *prop;
+
+ prop = drm_property_create_enum(adev_to_drm(adev),
+ DRM_MODE_PROP_ENUM,
+ "AMD_REGAMMA_TF",
+ drm_transfer_function_enum_list,
+ ARRAY_SIZE(drm_transfer_function_enum_list));
+ if (!prop)
+ return -ENOMEM;
+ adev->mode_info.regamma_tf_property = prop;
+
+ return 0;
+}
+#endif
+
const struct drm_mode_config_funcs amdgpu_mode_funcs = {
.fb_create = amdgpu_display_user_framebuffer_create,
};
@@ -1323,6 +1355,10 @@ int amdgpu_display_modeset_create_props(struct amdgpu_device *adev)
return -ENOMEM;
}
+#ifdef AMD_PRIVATE_COLOR
+ if (amdgpu_display_create_color_properties(adev))
+ return -ENOMEM;
+#endif
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index b8633df418d4..881446c51b36 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -344,6 +344,14 @@ struct amdgpu_mode_info {
int disp_priority;
const struct amdgpu_display_funcs *funcs;
const enum drm_plane_type *plane_type;
+
+ /* Driver-private color mgmt props */
+
+ /* @regamma_tf_property: Transfer function for CRTC regamma
+ * (post-blending). Possible values are defined by `enum
+ * drm_transfer_function`.
+ */
+ struct drm_property *regamma_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 2e2413fd73a4..ad5ee28b83dc 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -699,6 +699,20 @@ static inline void amdgpu_dm_set_mst_status(uint8_t *status,
extern const struct amdgpu_ip_block_version dm_ip_block;
+enum drm_transfer_function {
+ DRM_TRANSFER_FUNCTION_DEFAULT,
+ DRM_TRANSFER_FUNCTION_SRGB,
+ DRM_TRANSFER_FUNCTION_BT709,
+ DRM_TRANSFER_FUNCTION_PQ,
+ DRM_TRANSFER_FUNCTION_LINEAR,
+ DRM_TRANSFER_FUNCTION_UNITY,
+ DRM_TRANSFER_FUNCTION_HLG,
+ DRM_TRANSFER_FUNCTION_GAMMA22,
+ DRM_TRANSFER_FUNCTION_GAMMA24,
+ DRM_TRANSFER_FUNCTION_GAMMA26,
+ DRM_TRANSFER_FUNCTION_MAX,
+};
+
struct dm_plane_state {
struct drm_plane_state base;
struct dc_plane_state *dc_state;
@@ -726,6 +740,14 @@ struct dm_crtc_state {
struct dc_info_packet vrr_infopacket;
int abm_level;
+
+ /**
+ * @regamma_tf:
+ *
+ * Pre-defined transfer function for converting internal FB -> wire
+ * encoding.
+ */
+ enum drm_transfer_function regamma_tf;
};
#define to_dm_crtc_state(x) container_of(x, struct dm_crtc_state, base)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
index e3762e806617..1eb279d341c5 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
@@ -229,7 +229,6 @@ static void dm_crtc_destroy_state(struct drm_crtc *crtc,
if (cur->stream)
dc_stream_release(cur->stream);
-
__drm_atomic_helper_crtc_destroy_state(state);
@@ -263,6 +262,7 @@ static struct drm_crtc_state *dm_crtc_duplicate_state(struct drm_crtc *crtc)
state->freesync_config = cur->freesync_config;
state->cm_has_degamma = cur->cm_has_degamma;
state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb;
+ state->regamma_tf = cur->regamma_tf;
state->crc_skip_count = cur->crc_skip_count;
state->mpo_requested = cur->mpo_requested;
/* TODO Duplicate dc_stream after objects are stream object is flattened */
@@ -299,6 +299,69 @@ static int amdgpu_dm_crtc_late_register(struct drm_crtc *crtc)
}
#endif
+#ifdef AMD_PRIVATE_COLOR
+/**
+ * drm_crtc_additional_color_mgmt - enable additional color properties
+ * @crtc: DRM CRTC
+ *
+ * This function lets the driver enable the 3D LUT color correction property
+ * on a CRTC. This includes shaper LUT, 3D LUT and regamma TF. The shaper
+ * LUT and 3D LUT property is only attached if its size is not 0.
+ */
+static void
+dm_crtc_additional_color_mgmt(struct drm_crtc *crtc)
+{
+ struct amdgpu_device *adev = drm_to_adev(crtc->dev);
+
+ if(adev->dm.dc->caps.color.mpc.ogam_ram)
+ drm_object_attach_property(&crtc->base,
+ adev->mode_info.regamma_tf_property,
+ DRM_TRANSFER_FUNCTION_DEFAULT);
+}
+
+static int
+amdgpu_dm_atomic_crtc_set_property(struct drm_crtc *crtc,
+ struct drm_crtc_state *state,
+ struct drm_property *property,
+ uint64_t val)
+{
+ struct amdgpu_device *adev = drm_to_adev(crtc->dev);
+ struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state);
+
+ if (property == adev->mode_info.regamma_tf_property) {
+ if (acrtc_state->regamma_tf != val) {
+ acrtc_state->regamma_tf = val;
+ acrtc_state->base.color_mgmt_changed |= 1;
+ }
+ } else {
+ drm_dbg_atomic(crtc->dev,
+ "[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
+ crtc->base.id, crtc->name,
+ property->base.id, property->name);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int
+amdgpu_dm_atomic_crtc_get_property(struct drm_crtc *crtc,
+ const struct drm_crtc_state *state,
+ struct drm_property *property,
+ uint64_t *val)
+{
+ struct amdgpu_device *adev = drm_to_adev(crtc->dev);
+ struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state);
+
+ if (property == adev->mode_info.regamma_tf_property)
+ *val = acrtc_state->regamma_tf;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+#endif
+
/* Implemented only the options currently available for the driver */
static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
.reset = dm_crtc_reset_state,
@@ -317,6 +380,10 @@ static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
#if defined(CONFIG_DEBUG_FS)
.late_register = amdgpu_dm_crtc_late_register,
#endif
+#ifdef AMD_PRIVATE_COLOR
+ .atomic_set_property = amdgpu_dm_atomic_crtc_set_property,
+ .atomic_get_property = amdgpu_dm_atomic_crtc_get_property,
+#endif
};
static void dm_crtc_helper_disable(struct drm_crtc *crtc)
@@ -480,6 +547,9 @@ int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
drm_mode_crtc_set_gamma_size(&acrtc->base, MAX_COLOR_LEGACY_LUT_ENTRIES);
+#ifdef AMD_PRIVATE_COLOR
+ dm_crtc_additional_color_mgmt(&acrtc->base);
+#endif
return 0;
fail:
--
2.39.2
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