[RFC PATCH v2 06/18] drm/drm_color_mgmt: set first lut3d mode as default

[Melissa Wen]

Signed-off-by: Melissa Wen <m...@igalia.com>
---
 drivers/gpu/drm/drm_color_mgmt.c | 18 ++++++++++++++++--
 include/drm/drm_color_mgmt.h     |  3 ++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index 06503f693ecd..d6283f049881 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -280,18 +280,32 @@ EXPORT_SYMBOL(drm_crtc_create_lut3d_mode_property);
  * therefore optional.
  */
 void drm_crtc_enable_lut3d(struct drm_crtc *crtc,
-                          uint shaper_lut_size)
+                          uint shaper_lut_size,
+                          bool first_value_as_default)
 {
        struct drm_device *dev = crtc->dev;
        struct drm_mode_config *config = &dev->mode_config;
+       struct drm_property_enum *prop;
+       uint init_value = 0;
 
        if (!config->lut3d_mode_property)
                return;
 
        drm_object_attach_property(&crtc->base,
                                   config->lut3d_property, 0);
+
+       if (first_value_as_default) {
+               prop = 
list_first_entry_or_null(&config->lut3d_mode_property->enum_list,
+                                               typeof(*prop), head);
+               init_value = prop ? prop->value : 0;
+       }
+
        drm_object_attach_property(&crtc->base,
-                                  config->lut3d_mode_property, 0);
+                                  config->lut3d_mode_property,
+                                  init_value);
+
+       if (crtc->state && prop)
+               crtc->state->lut3d_mode = init_value;
 
        if (!shaper_lut_size)
                return;
diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h
index db2026dc825e..d13e99e2e877 100644
--- a/include/drm/drm_color_mgmt.h
+++ b/include/drm/drm_color_mgmt.h
@@ -64,7 +64,8 @@ int drm_crtc_create_lut3d_mode_property(struct drm_crtc *crtc,
                                        unsigned int num_modes);
 
 void drm_crtc_enable_lut3d(struct drm_crtc *crtc,
-                          uint shaper_lut_size);
+                          uint shaper_lut_size,
+                          bool first_value_as_default);
 
 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
                                 int gamma_size);
-- 
2.35.1