drm: add CRTC properties

The i915 driver needs this for the rotation and overscan compensation
properties. Other drivers might need this too.

Reviewed-by: Rob Clark <rob.clark@linaro.org>
Tested-by: Rob Clark <rob.clark@linaro.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 28 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 368e3e72a452..a177d0abb8bb 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -384,6 +384,8 @@ int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
         if (ret)
                 goto out;
 
+        crtc->base.properties = &crtc->properties;
+
         list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
         dev->mode_config.num_crtc++;
 
@@ -3141,6 +3143,21 @@ static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
         return ret;
 }
 
+static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
+                                      struct drm_property *property,
+                                      uint64_t value)
+{
+        int ret = -EINVAL;
+        struct drm_crtc *crtc = obj_to_crtc(obj);
+
+        if (crtc->funcs->set_property)
+                ret = crtc->funcs->set_property(crtc, property, value);
+        if (!ret)
+                drm_object_property_set_value(obj, property, value);
+
+        return ret;
+}
+
 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
                                       struct drm_file *file_priv)
 {
@@ -3239,6 +3256,9 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
                 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
                                                       arg->value);
                 break;
+        case DRM_MODE_OBJECT_CRTC:
+                ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
+                break;
         }
 
 out:
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 6d36552899ae..d59bb7d93657 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -306,7 +306,8 @@ struct drm_plane;
  * @mode_fixup: fixup proposed mode
  * @mode_set: set the desired mode on the CRTC
  * @gamma_set: specify color ramp for CRTC
- * @destroy: deinit and free object.
+ * @destroy: deinit and free object
+ * @set_property: called when a property is changed
  *
  * The drm_crtc_funcs structure is the central CRTC management structure
  * in the DRM.  Each CRTC controls one or more connectors (note that the name
@@ -350,6 +351,9 @@ struct drm_crtc_funcs {
         int (*page_flip)(struct drm_crtc *crtc,
                          struct drm_framebuffer *fb,
                          struct drm_pending_vblank_event *event);
+
+        int (*set_property)(struct drm_crtc *crtc,
+                            struct drm_property *property, uint64_t val);
 };
 
 /**
@@ -369,6 +373,7 @@ struct drm_crtc_funcs {
  * @framedur_ns: precise line timing
  * @pixeldur_ns: precise pixel timing
  * @helper_private: mid-layer private data
+ * @properties: property tracking for this CRTC
  *
  * Each CRTC may have one or more connectors associated with it.  This structure
  * allows the CRTC to be controlled.
@@ -404,6 +409,8 @@ struct drm_crtc {
 
         /* if you are using the helper */
         void *helper_private;
+
+        struct drm_object_properties properties;
 };