From: Joshua Ashton <joshua@xxxxxxxxx>
Map DRM plane blend properties to DPP blend gamma. Plane blend is a
post-3D LUT curve that linearizes color space for blending. It may be
defined by a user-blob LUT and/or predefined transfer function. As
hardcoded curve (ROM) is not supported on blend gamma, we use AMD color
module to fill parameters when setting non-linear TF with empty LUT.
Signed-off-by: Joshua Ashton <joshua@xxxxxxxxx>
---
.../amd/display/amdgpu_dm/amdgpu_dm_color.c | 60 +++++++++++++++++--
1 file changed, 56 insertions(+), 4 deletions(-)
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 baa7fea9ebae..a034c0c0d383 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
@@ -493,6 +493,34 @@ static int amdgpu_dm_atomic_shaper_lut(const struct drm_color_lut *shaper_lut,
return ret;
}
+static int amdgpu_dm_atomic_blend_lut(const struct drm_color_lut *blend_lut,
+ bool has_rom,
+ enum dc_transfer_func_predefined tf,
+ uint32_t blend_size,
+ struct dc_transfer_func *func_blend)
+{
+ int ret = 0;
+
+ if (blend_size || tf != TRANSFER_FUNCTION_LINEAR) {
+ /* DRM plane gamma LUT or TF means we are linearizing color
+ * space before blending (similar to degamma programming). As
+ * we don't have hardcoded curve support, or we use AMD color
+ * module to fill the parameters that will be translated to HW
+ * points.
+ */
+ func_blend->type = TF_TYPE_DISTRIBUTED_POINTS;
+ func_blend->tf = tf;
+ func_blend->sdr_ref_white_level = 80; /* hardcoded for now */
+
+ ret = __set_input_tf(func_blend, blend_lut, blend_size);
+ } else {
+ func_blend->type = TF_TYPE_BYPASS;
+ func_blend->tf = TRANSFER_FUNCTION_LINEAR;
+ }
+
+ return ret;
+}
+
/* amdgpu_dm_atomic_shaper_lut3d - set DRM CRTC shaper LUT and 3D LUT to DC
* interface
* @dc: Display Core control structure
@@ -921,9 +949,11 @@ amdgpu_dm_plane_set_color_properties(struct drm_plane_state *plane_state,
{
struct dm_plane_state *dm_plane_state = to_dm_plane_state(plane_state);
enum drm_transfer_function shaper_tf = DRM_TRANSFER_FUNCTION_DEFAULT;
- const struct drm_color_lut *shaper_lut, *lut3d;
- uint32_t lut3d_size, shaper_size;
-
+ enum drm_transfer_function blend_tf = DRM_TRANSFER_FUNCTION_DEFAULT;
+ const struct drm_color_lut *shaper_lut, *lut3d, *blend_lut;
+ uint32_t lut3d_size, shaper_size, blend_size;
+ int ret;
+
/* We have nothing to do here, return */
if (!plane_state->color_mgmt_changed)
return 0;
@@ -940,8 +970,30 @@ amdgpu_dm_plane_set_color_properties(struct drm_plane_state *plane_state,
ret = amdgpu_dm_atomic_shaper_lut(shaper_lut, false,
drm_tf_to_dc_tf(shaper_tf),
shaper_size, dc_plane_state->in_shaper_func);
+ if (ret) {
+ drm_dbg_kms(plane_state->plane->dev,
+ "setting plane %d shaper/3d lut failed.\n",
+ plane_state->plane->index);
- return ret;
+ return ret;
+ }
+
+ blend_tf = dm_plane_state->blend_tf;
+ blend_lut = __extract_blob_lut(dm_plane_state->blend_lut, &blend_size);
+ blend_size = blend_lut != NULL ? blend_size : 0;
+
+ ret = amdgpu_dm_atomic_blend_lut(blend_lut, false,
+ drm_tf_to_dc_tf(blend_tf),
+ blend_size, dc_plane_state->blend_tf);
+ if (ret) {
+ drm_dbg_kms(plane_state->plane->dev,
+ "setting plane %d gamma lut failed.\n",
+ plane_state->plane->index);
+
+ return ret;
+ }
+
+ return 0;
}
#endif
--
2.39.2
