1From aa2f34d80ef3118eae0cce73b610c36cdcb978fe Mon Sep 17 00:00:00 2001
2From: Ben Skeggs <bskeggs@redhat.com>
3Date: Sat, 22 Apr 2017 02:26:28 +1000
4Subject: [PATCH xserver] xfree86: use modesetting driver by default on GeForce
5 8 and newer
6
7Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
8---
9 hw/xfree86/common/xf86pciBus.c | 20 ++++++++++++++++++++
10 1 file changed, 20 insertions(+)
11
12--- a/hw/xfree86/common/xf86pciBus.c
13+++ b/hw/xfree86/common/xf86pciBus.c
14@@ -37,6 +37,9 @@
15 #include <unistd.h>
16 #include <X11/X.h>
17 #include <pciaccess.h>
18+#if defined(__linux__) || defined(__NetBSD__)
19+#include <xf86drm.h>
20+#endif
21 #include "os.h"
22 #include "Pci.h"
23 #include "xf86.h"
24@@ -1207,6 +1210,25 @@ xf86VideoPtrToDriverList(struct pci_devi
25         int idx = 0;
26
27 #if defined(__linux__) || defined(__NetBSD__)
28+        char busid[32];
29+        int fd;
30+
31+        snprintf(busid, sizeof(busid), "pci:%04x:%02x:%02x.%d",
32+                 dev->domain, dev->bus, dev->dev, dev->func);
33+
34+	/* 'modesetting' is preferred for GeForce 8 and newer GPUs */
35+        fd = drmOpenWithType("nouveau", busid, DRM_NODE_RENDER);
36+        if (fd >= 0) {
37+            uint64_t args[] = { 11 /* NOUVEAU_GETPARAM_CHIPSET_ID */, 0 };
38+            int ret = drmCommandWriteRead(fd, 0 /* DRM_NOUVEAU_GETPARAM */,
39+                                          &args, sizeof(args));
40+            drmClose(fd);
41+            if (ret == 0) {
42+                if (args[1] == 0x050 || args[1] >= 0x80)
43+                    break;
44+            }
45+        }
46+
47         driverList[idx++] = "nouveau";
48 #endif
49         driverList[idx++] = "nv";
50