Expose the framebuffer for writeback connectors to userspace by
attaching the fb_id property to them.
Signed-off-by: Brian Starkey <brian.starkey@xxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 9 +++++++++
drivers/gpu/drm/drm_connector.c | 4 ++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index b16b4fc..82e8e3a 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -986,12 +986,19 @@ int drm_atomic_connector_set_property(struct drm_connector *connector,
* now?) atomic writes to DPMS property:
*/
return -EINVAL;
+ } else if (property == config->prop_fb_id) {
+ struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val);
+ drm_atomic_set_fb_for_connector(state, fb);
+ if (fb)
+ drm_framebuffer_unreference(fb);
} else if (connector->funcs->atomic_set_property) {
return connector->funcs->atomic_set_property(connector,
state, property, val);
} else {
return -EINVAL;
}
+
+ return 0;
}
EXPORT_SYMBOL(drm_atomic_connector_set_property);
@@ -1022,6 +1029,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector,
*val = (state->crtc) ? state->crtc->base.id : 0;
} else if (property == config->dpms_property) {
*val = connector->dpms;
+ } else if (property == config->prop_fb_id) {
+ *val = (state->fb) ? state->fb->base.id : 0;
} else if (connector->funcs->atomic_get_property) {
return connector->funcs->atomic_get_property(connector,
state, property, val);
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 027d7a9..fb83870 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -249,6 +249,10 @@ int drm_connector_init(struct drm_device *dev,
drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
}
+ if (connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
+ drm_object_attach_property(&connector->base,
+ config->prop_fb_id, 0);
+
connector->debugfs_entry = NULL;
out_put_type_id:
if (ret)
--
1.7.9.5
--
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