From 536626891b60039c0f3f9b4cd96156e9fe810f39 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Fri, 17 Aug 2012 09:49:24 +1000
Subject: [PATCH] autobind GPUs to the screen, (v2)

this is racy and really not what we want for hotplug going forward,
but until DE support is in GNOME its probably for the best.

v2: fix if config or slave config is NULL
DO NOT UPSTREAM.
---
 hw/xfree86/common/xf86Init.c        |   12 ++++++++++++
 hw/xfree86/common/xf86platformBus.c |    3 +++
 hw/xfree86/modes/xf86Crtc.c         |   28 ++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+)

diff --git a/hw/xfree86/common/xf86Init.c b/hw/xfree86/common/xf86Init.c
index d231ced..89629c1 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)
 {
@@ -926,6 +936,8 @@ 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 a73aea2..3810076 100644
--- a/hw/xfree86/common/xf86platformBus.c
+++ b/hw/xfree86/common/xf86platformBus.c
@@ -387,6 +387,8 @@ xf86platformProbeDev(DriverPtr drvp)
     return foundScreen;
 }
 
+extern void xf86AutoConfigOutputDevice(ScrnInfoPtr pScrn, ScrnInfoPtr master);
+
 int
 xf86platformAddDevice(int index)
 {
@@ -446,6 +448,7 @@ 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 8f05c53..ba84e6b 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -3321,3 +3321,31 @@ 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);
+
+    if (!config || !slave_config)
+        return;
+
+    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