uxa/glamor: Refine CloseScreen and InitScreen process.

The previous version calls glamor_egl_close_screen and
glamor_egl_free_screen manually which is not align with
standard process. Now glamor change the way to follow
standard method:

glamor layer and glamor egl layer both have their internal
CloseScreens. The correct sequence is after the I830CloseScreen
is registered, then register glamor_egl_close_screen and
the last one is glamor_close_screen. So we move out the
intel_glamor_init from the intel_uxa_init to I830ScreenInit
and just after the registration of I830CloseScreen.

As the glamor interfaces changed, we need to check the
glamor version when load the glamor egl module to make
sure we are loading the right glamor module. If
failed, it will switch back to UXA path.

This depends upon glamor commit 1bc8bf tagged with version 0.3.0.

Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 8 insertions, 2 deletions

diff --git a/uxa/uxa.h b/uxa/uxa.h
index 66b5f1eb..b8569f04 100644
--- a/uxa/uxa.h
+++ b/uxa/uxa.h
@@ -548,12 +548,18 @@ typedef struct _UxaDriver {
 /**
  * UXA_USE_GLAMOR indicates to use glamor acceleration to perform rendering.
  * And if glamor fail to accelerate the rendering, then goto fallback to
- * use CPU to do the rendering.
+ * use CPU to do the rendering. This flag will be set only when glamor get
+ * initialized successfully.
+ * Note, in ddx close screen, this bit need to be cleared.
  */
 #define UXA_USE_GLAMOR			(1 << 3)
 
-/** @} */
+/* UXA_GLAMOR_EGL_INITIALIZED indicates glamor egl layer get initialized
+ * successfully. UXA layer does not use this flag, before call to
+ * glamor_init, ddx need to check this flag. */
+#define UXA_GLAMOR_EGL_INITIALIZED	(1 << 4)
 
+/** @} */
 /** @name UXA CreatePixmap hint flags
  * @{
  */