From 2107057dc210fdbcdbdb8cf8e0b0b703cfb25767 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, (v3)

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
v3: fix multi useful slaves
DO NOT UPSTREAM.

Signed-off-by: Dave Airlie <airlied@gmail.com>
---
 hw/xfree86/common/xf86Init.c        | 12 ++++++++++++
 hw/xfree86/common/xf86platformBus.c |  2 ++
 hw/xfree86/modes/xf86Crtc.c         | 25 +++++++++++++++++++++++++
 hw/xfree86/modes/xf86Crtc.h         |  3 +++
 4 files changed, 42 insertions(+)

diff --git a/hw/xfree86/common/xf86Init.c b/hw/xfree86/common/xf86Init.c
index 9bade90..33a40a5 100644
--- a/hw/xfree86/common/xf86Init.c
+++ b/hw/xfree86/common/xf86Init.c
@@ -76,6 +76,7 @@
 #include "xf86DDC.h"
 #include "xf86Xinput.h"
 #include "xf86InPriv.h"
+#include "xf86Crtc.h"
 #include "picturestr.h"
 
 #include "xf86Bus.h"
@@ -342,6 +343,15 @@ xf86CreateRootWindow(WindowPtr pWin)
 }
 
 static void
+xf86AutoConfigOutputDevices(void)
+{
+    int i;
+
+    for (i = 0; i < xf86NumGPUScreens; i++)
+        xf86AutoConfigOutputDevice(xf86GPUScreens[i], xf86Screens[0]);
+}
+
+static void
 InstallSignalHandlers(void)
 {
     /*
@@ -930,6 +940,8 @@ 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 96895a6..028db03 100644
--- a/hw/xfree86/common/xf86platformBus.c
+++ b/hw/xfree86/common/xf86platformBus.c
@@ -48,6 +48,7 @@
 #include "Pci.h"
 #include "xf86platformBus.h"
 #include "xf86Config.h"
+#include "xf86Crtc.h"
 
 #include "randrstr.h"
 int platformSlotClaimed;
@@ -540,6 +541,7 @@ xf86platformAddDevice(int index)
    }
    /* attach unbound to 0 protocol screen */
    AttachUnboundGPU(xf86Screens[0]->pScreen, xf86GPUScreens[i]->pScreen);
+   xf86AutoConfigOutputDevice(xf86GPUScreens[i], xf86Screens[0]);
 
    RRResourcesChanged(xf86Screens[0]->pScreen);
    RRTellChanged(xf86Screens[0]->pScreen);
diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 4a13c13..b926298 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -3575,3 +3575,28 @@ 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);
+
+    if (!config || !slave_config)
+        return;
+
+    master_provider = config->randr_provider;
+
+    if ((master->capabilities & RR_Capability_SinkOffload) &&
+               pScrn->capabilities & RR_Capability_SourceOffload) {
+        /* source offload */
+        AttachOffloadGPU(master->pScreen, pScrn->pScreen);
+        slave_config->randr_provider->offload_sink = master_provider;
+    }
+    if ((master->capabilities & RR_Capability_SourceOutput) &&
+               pScrn->capabilities & RR_Capability_SinkOutput) {
+        /* sink offload */
+        AttachOutputGPU(master->pScreen, pScrn->pScreen);
+        slave_config->randr_provider->output_source = master_provider;
+    }
+}
diff --git a/hw/xfree86/modes/xf86Crtc.h b/hw/xfree86/modes/xf86Crtc.h
index 8b01608..05ee338 100644
--- a/hw/xfree86/modes/xf86Crtc.h
+++ b/hw/xfree86/modes/xf86Crtc.h
@@ -1046,4 +1046,7 @@ xf86ProviderSetup(ScrnInfoPtr scrn,
 extern _X_EXPORT void
 xf86DetachAllCrtc(ScrnInfoPtr scrn);
 
+extern _X_EXPORT void
+xf86AutoConfigOutputDevice(ScrnInfoPtr pScrn, ScrnInfoPtr master);
+
 #endif                          /* _XF86CRTC_H_ */
-- 
2.9.3