commit 8a92424a3ae0078af7ffb5523cd75e60cf9a340a
author Haihua Hu <jared.hu@nxp.com> Thu Nov 09 13:00:17 2017 +0800
committer Lyon Wang <lyon.wang@nxp.com> Wed Dec 19 16:09:50 2018 +0800
tree 052265482d8fa70dd2b6115b97b07d06ea8d9e30
parent ef3eff055ddc216242044fb4b38cb61123bc1d24

kmssink: add global alpha setting for mscale

upstream status: i.mx specific

sys/kms/gstkmssink.c

diff --git a/sys/kms/gstkmssink.c b/sys/kms/gstkmssink.c
index 7c3b3ee..f0f5c0e 100644
--- a/sys/kms/gstkmssink.c
+++ b/sys/kms/gstkmssink.c
@@ -1372,6 +1372,58 @@
   return TRUE;
 }
 
+static void
+gst_kms_sink_set_primary_alpha (GstKMSSink * self, guint alpha)
+{
+  drmModeRes *res = NULL;
+  drmModePlaneRes *pres = NULL;
+  drmModePlane *plane = NULL;
+  drmModeObjectPropertiesPtr props = NULL;
+  drmModePropertyPtr prop = NULL;
+  guint i;
+
+  res = drmModeGetResources (self->fd);
+  if (!res)
+    goto out;
+
+  drmSetClientCap (self->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
+
+  pres = drmModeGetPlaneResources (self->fd);
+  if (!pres)
+    goto out;
+
+  plane = find_plane_for_crtc (self->fd, res, pres, self->crtc_id);
+  if (!plane)
+    goto out;
+
+  props = drmModeObjectGetProperties (self->fd, plane->plane_id, DRM_MODE_OBJECT_PLANE);
+  for (i = 0; i < props->count_props; ++i) {
+     prop = drmModeGetProperty(self->fd, props->props[i]);
+      if (!strcmp(prop->name, "alpha"))
+         break;
+    drmModeFreeProperty (prop);
+    prop = NULL;
+  }
+
+  if (prop) {
+    GST_DEBUG ("set global alpha %d to primary plane %d property %d",
+        alpha, plane->plane_id, prop->prop_id);
+    drmModeObjectSetProperty (self->ctrl_fd, plane->plane_id, DRM_MODE_OBJECT_PLANE, prop->prop_id, alpha);
+    drmModeFreeProperty (prop);
+  }
+
+out:
+  if (res)
+    drmModeFreeResources (res);
+  if (pres)
+    drmModeFreePlaneResources (pres);
+  if (plane)
+    drmModeFreePlane (plane);
+  if (props)
+    drmModeFreeObjectProperties (props);
+  drmSetClientCap (self->fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 0);
+}
+
 static GstStateChangeReturn
 gst_kms_sink_change_state (GstElement * element, GstStateChange transition)
 {
@@ -1386,6 +1438,7 @@
 
   switch (transition) {
     case GST_STATE_CHANGE_NULL_TO_READY:
+      self->is_alpha_set = FALSE;
       break;
     case GST_STATE_CHANGE_READY_TO_PAUSED:
       break;
@@ -1407,6 +1460,7 @@
     }
     case GST_STATE_CHANGE_PAUSED_TO_READY:
     {
+      gst_kms_sink_set_primary_alpha (self, 255);
       break;
     }
     case GST_STATE_CHANGE_READY_TO_NULL:
@@ -1579,6 +1633,11 @@
 
   GST_TRACE_OBJECT (self, "displaying fb %d", fb_id);
 
+  if (!self->is_alpha_set) {
+    gst_kms_sink_set_primary_alpha (self, 0);
+    self->is_alpha_set = TRUE;
+  }
+
   GST_OBJECT_LOCK (self);
   if (self->modesetting_enabled) {
     self->buffer_id = fb_id;

sys/kms/gstkmssink.h

diff --git a/sys/kms/gstkmssink.h b/sys/kms/gstkmssink.h
index 22d1967..671d824 100644
--- a/sys/kms/gstkmssink.h
+++ b/sys/kms/gstkmssink.h
@@ -69,6 +69,9 @@
   gboolean has_async_page_flip;
   gboolean can_scale;
 
+  /* global alpha */
+  gboolean is_alpha_set;
+
   gboolean modesetting_enabled;
 
   GstVideoInfo vinfo;