[PATCH] reference patch: autobind GPUs to the screen,

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

This isn't for merging, ideally now that randr exposes providers, the desktop
environments would start to add support for them, so when they appear they
DE would bind/unbind them etc.

However until that glorious future arrives I've written an autoconfigure
patch. I'm shipping this in F17 while I kick at GNOME.

Dave.

---
 hw/xfree86/common/xf86Init.c        |   12 ++++++++++++
 hw/xfree86/common/xf86platformBus.c |    3 +++
 hw/xfree86/modes/xf86Crtc.c         |   25 +++++++++++++++++++++++++
 3 files changed, 40 insertions(+)

diff --git a/hw/xfree86/common/xf86Init.c b/hw/xfree86/common/xf86Init.c
index e4a6b86..a79aeb5 100644
--- a/hw/xfree86/common/xf86Init.c
+++ b/hw/xfree86/common/xf86Init.c
@@ -361,6 +361,16 @@ xf86CreateRootWindow(WindowPtr pWin)
     return ret;
 }
 
+extern void xf86AutoConfigOutputDevice(ScrnInfoPtr pScrn, ScrnInfoPtr master);                              
+static void
+xf86AutoConfigOutputDevices(void)
+{
+    int i;
+
+    for (i = 0; i < xf86NumGPUScreens; i++)
+        xf86AutoConfigOutputDevice(xf86GPUScreens[i], xf86Screens[0]);
+}
+
 static void
 InstallSignalHandlers(void)
 {
@@ -927,6 +937,8 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
     for (i = 0; i < xf86NumGPUScreens; i++)
         AttachUnboundGPU(xf86Screens[0]->pScreen, xf86GPUScreens[i]->pScreen);
 
+    xf86AutoConfigOutputDevices();
+
     xf86VGAarbiterWrapFunctions();
     if (sigio_blocked)
         OsReleaseSIGIO();
diff --git a/hw/xfree86/common/xf86platformBus.c b/hw/xfree86/common/xf86platformBus.c
index 24b9473..502d3c4 100644
--- a/hw/xfree86/common/xf86platformBus.c
+++ b/hw/xfree86/common/xf86platformBus.c
@@ -383,6 +383,8 @@ xf86platformProbeDev(DriverPtr drvp)
     return foundScreen;
 }
 
+extern void xf86AutoConfigOutputDevice(ScrnInfoPtr pScrn, ScrnInfoPtr master);
+
 int
 xf86platformAddDevice(int index)
 {
@@ -442,6 +444,7 @@ xf86platformAddDevice(int index)
 
    /* attach unbound to 0 protocol screen */
    AttachUnboundGPU(xf86Screens[0]->pScreen, xf86GPUScreens[i]->pScreen);
+   xf86AutoConfigOutputDevice(xf86GPUScreens[i], xf86Screens[0]);
 
    return 0;
 }
diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 1947c5b..153c795 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -3260,3 +3260,28 @@ xf86DetachAllCrtc(ScrnInfoPtr scrn)
             crtc->x = crtc->y = 0;
         }
 }
+
+
+void xf86AutoConfigOutputDevice(ScrnInfoPtr pScrn, ScrnInfoPtr master)
+{
+    RRProviderPtr master_provider;
+    xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(master);
+    xf86CrtcConfigPtr slave_config = XF86_CRTC_CONFIG_PTR(pScrn);
+
+    master_provider = config->randr_provider;
+
+    if ((master->capabilities & RR_Capability_SinkOffload) &&
+        pScrn->capabilities & RR_Capability_SourceOffload) {
+            /* source offload */
+            
+        DetachUnboundGPU(pScrn->pScreen);
+        AttachOffloadGPU(master->pScreen, pScrn->pScreen);
+        slave_config->randr_provider->offload_sink = master_provider;
+    } else if ((master->capabilities & RR_Capability_SourceOutput) &&
+               pScrn->capabilities & RR_Capability_SinkOutput) {
+        /* sink offload */
+        DetachUnboundGPU(pScrn->pScreen);
+        AttachOutputGPU(master->pScreen, pScrn->pScreen);
+        slave_config->randr_provider->output_source = master_provider;
+    }
+}
-- 
1.7.10.2