Make driDrawableInitVBlank() initialize the sequence number.

This prevents the first wait for vertical blank from timing out when the X
server has been running for a long time.

src/mesa/drivers/dri/common/vblank.c

@@ -208,20 +208,6 @@ GLuint driGetDefaultVBlankFlags( const driOptionCache *optionCache )
 }
 
 
-/****************************************************************************/
-/**
- * Sets the default swap interval when the drawable is first bound to a
- * direct rendering context.
- */
-
-void driDrawableInitVBlank( __DRIdrawablePrivate *priv, GLuint flags )
-{
-   if ( priv->pdraw->swap_interval == (unsigned)-1 ) {
-      priv->pdraw->swap_interval = (flags & VBLANK_FLAG_THROTTLE) != 0 ? 1 : 0;
-   }
-}
-
-
 /****************************************************************************/
 /**
  * Wrapper to call \c drmWaitVBlank.  The main purpose of this function is to
@@ -260,6 +246,25 @@ static int do_wait( drmVBlank * vbl, GLuint * vbl_seq, int fd )
 }
 
 
+/****************************************************************************/
+/**
+ * Sets the default swap interval when the drawable is first bound to a
+ * direct rendering context.
+ */
+
+void driDrawableInitVBlank( __DRIdrawablePrivate *priv, GLuint flags,
+			    GLuint *vbl_seq )
+{
+   if ( priv->pdraw->swap_interval == (unsigned)-1 ) {
+      /* Get current vertical blank sequence */
+      drmVBlank vbl = { .request={ .type = DRM_VBLANK_RELATIVE, .sequence = 0 } };
+      do_wait( &vbl, vbl_seq, priv->driScreenPriv->fd );
+
+      priv->pdraw->swap_interval = (flags & VBLANK_FLAG_THROTTLE) != 0 ? 1 : 0;
+   }
+}
+
+
 /****************************************************************************/
 /**
  * Waits for the vertical blank for use with glXSwapBuffers.

src/mesa/drivers/dri/common/vblank.h

@@ -47,7 +47,8 @@ extern int driGetMSC32( __DRIscreenPrivate * priv, int64_t * count );
 extern int driWaitForMSC32( __DRIdrawablePrivate *priv,
     int64_t target_msc, int64_t divisor, int64_t remainder, int64_t * msc );
 extern GLuint driGetDefaultVBlankFlags( const driOptionCache *optionCache );
-extern void driDrawableInitVBlank ( __DRIdrawablePrivate *priv, GLuint flags );
+extern void driDrawableInitVBlank ( __DRIdrawablePrivate *priv, GLuint flags,
+				    GLuint *vbl_seq );
 extern int driWaitForVBlank( const __DRIdrawablePrivate *priv,
     GLuint * vbl_seq, GLuint flags, GLboolean * missed_deadline );
 

src/mesa/drivers/dri/i915/intel_context.c

@@ -596,7 +596,8 @@ GLboolean intelMakeCurrent(__DRIcontextPrivate *driContextPriv,
 
       if ( intel->driDrawable != driDrawPriv ) {
 	 /* Shouldn't the readbuffer be stored also? */
-	 driDrawableInitVBlank( driDrawPriv, intel->vblank_flags );
+	 driDrawableInitVBlank( driDrawPriv, intel->vblank_flags,
+				&intel->vbl_seq );
 
 	 intel->driDrawable = driDrawPriv;
 	 intelWindowMoved( intel );

src/mesa/drivers/dri/mach64/mach64_context.c

@@ -308,7 +308,8 @@ mach64MakeCurrent( __DRIcontextPrivate *driContextPriv,
       }
 
       
-      driDrawableInitVBlank( driDrawPriv, newMach64Ctx->vblank_flags );
+      driDrawableInitVBlank( driDrawPriv, newMach64Ctx->vblank_flags,
+			     &newMach64Ctx->vbl_seq );
 
       if ( newMach64Ctx->driDrawable != driDrawPriv ) {
 	 newMach64Ctx->driDrawable = driDrawPriv;

src/mesa/drivers/dri/mga/mga_xmesa.c

@@ -878,7 +878,8 @@ mgaMakeCurrent(__DRIcontextPrivate *driContextPriv,
       mgaContextPtr mmesa = (mgaContextPtr) driContextPriv->driverPrivate;
 
       if (mmesa->driDrawable != driDrawPriv) {
-	 driDrawableInitVBlank( driDrawPriv, mmesa->vblank_flags );
+	 driDrawableInitVBlank( driDrawPriv, mmesa->vblank_flags,
+				&mmesa->vbl_seq );
 	 mmesa->driDrawable = driDrawPriv;
 	 mmesa->dirty = ~0; 
 	 mmesa->dirty_cliprects = (MGA_FRONT|MGA_BACK); 

src/mesa/drivers/dri/r128/r128_context.c

@@ -345,7 +345,8 @@ r128MakeCurrent( __DRIcontextPrivate *driContextPriv,
 	 newR128Ctx->dirty = R128_UPLOAD_ALL;
       }
 
-      driDrawableInitVBlank( driDrawPriv, newR128Ctx->vblank_flags );
+      driDrawableInitVBlank( driDrawPriv, newR128Ctx->vblank_flags,
+			     &newR128Ctx->vbl_seq );
       newR128Ctx->driDrawable = driDrawPriv;
 
       _mesa_make_current( newR128Ctx->glCtx,

src/mesa/drivers/dri/r200/r200_context.c

@@ -694,7 +694,8 @@ r200MakeCurrent( __DRIcontextPrivate *driContextPriv,
 	 fprintf(stderr, "%s ctx %p\n", __FUNCTION__, (void *)newCtx->glCtx);
 
       if ( newCtx->dri.drawable != driDrawPriv ) {
-	 driDrawableInitVBlank( driDrawPriv, newCtx->vblank_flags );
+	 driDrawableInitVBlank( driDrawPriv, newCtx->vblank_flags,
+				&newCtx->vbl_seq );
 	 newCtx->dri.drawable = driDrawPriv;
 	 r200UpdateWindow( newCtx->glCtx );
 	 r200UpdateViewportOffset( newCtx->glCtx );

src/mesa/drivers/dri/r300/radeon_context.c

@@ -285,7 +285,8 @@ GLboolean radeonMakeCurrent(__DRIcontextPrivate * driContextPriv,
 
 		if (radeon->dri.drawable != driDrawPriv) {
 			driDrawableInitVBlank(driDrawPriv,
-					      radeon->vblank_flags);
+					      radeon->vblank_flags,
+					      &radeon->vbl_seq);
 			radeon->dri.drawable = driDrawPriv;
 			
 			r300UpdateWindow(radeon->glCtx);

src/mesa/drivers/dri/radeon/radeon_context.c

@@ -620,7 +620,8 @@ radeonMakeCurrent( __DRIcontextPrivate *driContextPriv,
 
       if ( newCtx->dri.drawable != driDrawPriv ) {
          /* XXX we may need to validate the drawable here!!! */
-	 driDrawableInitVBlank( driDrawPriv, newCtx->vblank_flags );
+	 driDrawableInitVBlank( driDrawPriv, newCtx->vblank_flags,
+				&newCtx->vbl_seq );
 	 newCtx->dri.drawable = driDrawPriv;
 	 radeonUpdateWindow( newCtx->glCtx );
 	 radeonUpdateViewportOffset( newCtx->glCtx );

src/mesa/drivers/dri/unichrome/via_context.c

@@ -815,7 +815,8 @@ viaMakeCurrent(__DRIcontextPrivate *driContextPriv,
         readBuffer = (GLframebuffer *)driReadPriv->driverPrivate;
 
 	if ( vmesa->driDrawable != driDrawPriv ) {
-	   driDrawableInitVBlank( driDrawPriv, vmesa->vblank_flags );
+	   driDrawableInitVBlank( driDrawPriv, vmesa->vblank_flags,
+				  &vmesa->vbl_seq );
 	   vmesa->driDrawable = driDrawPriv;
 	   if ( ! calculate_buffer_parameters( vmesa, drawBuffer ) ) {
 	      return GL_FALSE;