[PATCH 1/3] drm: Add an "expose 3d modes" property

[Damien Lespiau <damien.lespiau@xxxxxxxxx>]

From: Damien Lespiau <damien.lespiau@xxxxxxxxx>

The "expose 3D modes" property can be attached to connectors to allow
user space to indicate it can deal with 3D modes and that the drm driver
should expose those 3D modes.

Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
---
 drivers/gpu/drm/drm_crtc.c | 35 ++++++++++++++++++++++++++++++++++-
 include/drm/drm_crtc.h     |  6 ++++++
 include/drm/drm_mode.h     |  4 ++++
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 6fbfc24..10a289c 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -841,6 +841,35 @@ int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
 }
 EXPORT_SYMBOL(drm_mode_create_tv_properties);
 
+static const struct drm_prop_enum_list expose_3d_modes_list[] =
+{
+	{ DRM_MODE_EXPOSE_3D_MODES_OFF, "Off" },
+	{ DRM_MODE_EXPOSE_3D_MODES_ON, "On" }
+};
+
+/**
+ * drm_mode_create_s3d_properties - create stereo 3D properties
+ * @dev: DRM device
+ *
+ * This functions create properties that are used by the stereo 3D code. Those
+ * properties must be attached to the desired connectors afterwards.
+ */
+int drm_mode_create_s3d_properties(struct drm_device *dev)
+{
+	struct drm_property *prop;
+
+	if (dev->mode_config.s3d_expose_modes_property)
+		return 0;
+
+	prop = drm_property_create_enum(dev, 0, "expose 3D modes",
+					expose_3d_modes_list,
+					ARRAY_SIZE(expose_3d_modes_list));
+	dev->mode_config.s3d_expose_modes_property = prop;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_s3d_properties);
+
 /**
  * drm_mode_create_scaling_mode_property - create scaling mode property
  * @dev: DRM device
@@ -3170,12 +3199,16 @@ static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
 {
 	int ret = -EINVAL;
 	struct drm_connector *connector = obj_to_connector(obj);
+	struct drm_device *dev = connector->dev;
 
 	/* Do DPMS ourselves */
-	if (property == connector->dev->mode_config.dpms_property) {
+	if (property == dev->mode_config.dpms_property) {
 		if (connector->funcs->dpms)
 			(*connector->funcs->dpms)(connector, (int)value);
 		ret = 0;
+	} else if (property == dev->mode_config.s3d_expose_modes_property) {
+		connector->expose_3d_modes = value;
+		ret = 0;
 	} else if (connector->funcs->set_property)
 		ret = connector->funcs->set_property(connector, property, value);
 
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index bfacf0d..34372cb 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -578,6 +578,8 @@ struct drm_connector {
 	/* requested DPMS state */
 	int dpms;
 
+	int expose_3d_modes;
+
 	void *helper_private;
 
 	/* forced on connector */
@@ -802,6 +804,9 @@ struct drm_mode_config {
 	struct drm_property *tv_saturation_property;
 	struct drm_property *tv_hue_property;
 
+	/* Stereo 3D properties */
+	struct drm_property *s3d_expose_modes_property;
+
 	/* Optional properties */
 	struct drm_property *scaling_mode_property;
 	struct drm_property *dithering_mode_property;
@@ -950,6 +955,7 @@ extern int drm_property_add_enum(struct drm_property *property, int index,
 extern int drm_mode_create_dvi_i_properties(struct drm_device *dev);
 extern int drm_mode_create_tv_properties(struct drm_device *dev, int num_formats,
 				     char *formats[]);
+extern int drm_mode_create_s3d_properties(struct drm_device *dev);
 extern int drm_mode_create_scaling_mode_property(struct drm_device *dev);
 extern int drm_mode_create_dithering_property(struct drm_device *dev);
 extern int drm_mode_create_dirty_info_property(struct drm_device *dev);
diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h
index 3d6301b..45b19c6 100644
--- a/include/drm/drm_mode.h
+++ b/include/drm/drm_mode.h
@@ -83,6 +83,10 @@
 #define DRM_MODE_DIRTY_ON       1
 #define DRM_MODE_DIRTY_ANNOTATE 2
 
+/* Expose 3D modes */
+#define DRM_MODE_EXPOSE_3D_MODES_OFF	0
+#define DRM_MODE_EXPOSE_3D_MODES_ON	1
+
 struct drm_mode_modeinfo {
 	__u32 clock;
 	__u16 hdisplay, hsync_start, hsync_end, htotal, hskew;
-- 
1.7.11.4

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