From 36fd55f9f03b00263ee1ccf22bbb50e5ba048e80 Mon Sep 17 00:00:00 2001
From: Jakob Bornecrantz <jakob@vmware.com>
Date: Thu, 21 Jan 2010 21:23:22 +0100
Subject: [PATCH] st/xorg: Export helper function for detecting modesetting

---
 src/gallium/state_trackers/xorg/xorg_driver.c | 22 +++++++++++++++++++
 src/gallium/state_trackers/xorg/xorg_winsys.h |  1 +
 2 files changed, 23 insertions(+)

diff --git a/src/gallium/state_trackers/xorg/xorg_driver.c b/src/gallium/state_trackers/xorg/xorg_driver.c
index 41bfcd0f5e7..c180f0b1567 100644
--- a/src/gallium/state_trackers/xorg/xorg_driver.c
+++ b/src/gallium/state_trackers/xorg/xorg_driver.c
@@ -110,6 +110,28 @@ xorg_tracker_set_functions(ScrnInfoPtr scrn)
     scrn->ValidMode = drv_valid_mode;
 }
 
+Bool
+xorg_tracker_have_modesetting(ScrnInfoPtr pScrn, struct pci_device *device)
+{
+    char *BusID = xalloc(64);
+    sprintf(BusID, "pci:%04x:%02x:%02x.%d",
+	    device->domain, device->bus,
+	    device->dev, device->func);
+
+    if (drmCheckModesettingSupported(BusID)) {
+	xf86DrvMsgVerb(pScrn->scrnIndex, X_INFO, 0,
+		       "Drm modesetting not supported %s\n", BusID);
+	xfree(BusID);
+	return FALSE;
+    }
+
+    xf86DrvMsgVerb(pScrn->scrnIndex, X_INFO, 0,
+		   "Drm modesetting supported on %s\n", BusID);
+
+    xfree(BusID);
+    return TRUE;
+}
+
 
 /*
  * Internal function definitions
diff --git a/src/gallium/state_trackers/xorg/xorg_winsys.h b/src/gallium/state_trackers/xorg/xorg_winsys.h
index 47ee4b9ffd8..865733bca2b 100644
--- a/src/gallium/state_trackers/xorg/xorg_winsys.h
+++ b/src/gallium/state_trackers/xorg/xorg_winsys.h
@@ -45,5 +45,6 @@
 
 void xorg_tracker_set_functions(ScrnInfoPtr scrn);
 const OptionInfoRec * xorg_tracker_available_options(int chipid, int busid);
+Bool xorg_tracker_have_modesetting(ScrnInfoPtr pScrn, struct pci_device *device);
 
 #endif
-- 
2.30.2