Add AMD pre-defined transfer function property to default DRM CRTC
gamma to convert to wire encoding with or without a user gamma LUT.
v2:
- enable CRTC prop in the end of driver-specific prop sequence
- define inverse EOTFs as supported regamma TFs
- reword driver-specific function doc to remove shaper/3D LUT
Co-developed-by: Joshua Ashton <jos...@froggi.es>
Signed-off-by: Joshua Ashton <jos...@froggi.es>
Signed-off-by: Melissa Wen <m...@igalia.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 5 ++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 8 +++
.../amd/display/amdgpu_dm/amdgpu_dm_color.c | 7 ++
.../amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 72 +++++++++++++++++++
4 files changed, 92 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index fd0b7047d56b..abb871a912d7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -407,6 +407,11 @@ struct amdgpu_mode_info {
* with or without LUT.
*/
struct drm_property *plane_blend_tf_property;
+ /* @regamma_tf_property: Transfer function for CRTC regamma
+ * (post-blending). Possible values are defined by `enum
+ * amdgpu_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 b6fa271ab0dd..51471675c298 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -821,6 +821,14 @@ 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 amdgpu_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_color.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
index 2d64332e6b80..841e0391f7fb 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
@@ -273,6 +273,13 @@ amdgpu_dm_create_color_properties(struct amdgpu_device
*adev)
return -ENOMEM;
adev->mode_info.plane_blend_tf_property = prop;
+ prop = amdgpu_create_tf_property(adev_to_drm(adev),
+ "AMD_CRTC_REGAMMA_TF",
+ amdgpu_inv_eotf);
+ if (!prop)
+ return -ENOMEM;
+ adev->mode_info.regamma_tf_property = prop;
+
return 0;
}
#endif
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 440fc0869a34..d746f0aa0f11 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
@@ -253,6 +253,7 @@ 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 */
@@ -289,6 +290,70 @@ 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 post-blending CRTC regamma transfer
+ * function property in addition to DRM CRTC gamma LUT. Default value means
+ * linear transfer function, which is the default CRTC gamma LUT behaviour
+ * without this property.
+ */
+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,
+ AMDGPU_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,
@@ -307,6 +372,10 @@ 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)
@@ -470,6 +539,9 @@ 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:
--
2.40.1
