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From aa2f34d80ef3118eae0cce73b610c36cdcb978fe Mon Sep 17 00:00:00 2001
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From: Ben Skeggs <bskeggs@redhat.com>
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Date: Sat, 22 Apr 2017 02:26:28 +1000
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Subject: [PATCH xserver] xfree86: use modesetting driver by default on GeForce
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8 and newer
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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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---
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hw/xfree86/common/xf86pciBus.c | 20 ++++++++++++++++++++
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1 file changed, 20 insertions(+)
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diff --git a/hw/xfree86/common/xf86pciBus.c b/hw/xfree86/common/xf86pciBus.c
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index 8158c2b62..78d1c947d 100644
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--- a/hw/xfree86/common/xf86pciBus.c
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+++ b/hw/xfree86/common/xf86pciBus.c
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@@ -37,6 +37,7 @@
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#include <unistd.h>
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#include <X11/X.h>
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#include <pciaccess.h>
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+#include <xf86drm.h>
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#include "os.h"
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#include "Pci.h"
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#include "xf86.h"
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@@ -1190,6 +1191,25 @@ xf86VideoPtrToDriverList(struct pci_device *dev,
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int idx = 0;
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#if defined(__linux__) || defined(__NetBSD__)
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+ char busid[32];
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+ int fd;
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+
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+ snprintf(busid, sizeof(busid), "pci:%04x:%02x:%02x.%d",
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+ dev->domain, dev->bus, dev->dev, dev->func);
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+
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+ /* 'modesetting' is preferred for GeForce 8 and newer GPUs */
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+ fd = drmOpenWithType("nouveau", busid, DRM_NODE_RENDER);
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+ if (fd >= 0) {
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+ uint64_t args[] = { 11 /* NOUVEAU_GETPARAM_CHIPSET_ID */, 0 };
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+ int ret = drmCommandWriteRead(fd, 0 /* DRM_NOUVEAU_GETPARAM */,
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+ &args, sizeof(args));
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+ drmClose(fd);
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+ if (ret == 0) {
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+ if (args[1] == 0x050 || args[1] >= 0x80)
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+ break;
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+ }
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+ }
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+
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driverList[idx++] = "nouveau";
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#endif
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driverList[idx++] = "nv";
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--
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2.12.2
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