From 6a2dcb388e6b549c3175ccfbcd3f1751e25de40a Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 31 Jul 2015 10:40:32 +0100
Subject: [PATCH] intel: Refactor i915.ko loading support

Different OS name the i915 KMS module differently, so make it convenient
for us to be able to feed in the right name, or even just try them all
and pick the first one that exists!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/intel_device.c | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/src/intel_device.c b/src/intel_device.c
index f1a6887d..54c14436 100644
--- a/src/intel_device.c
+++ b/src/intel_device.c
@@ -203,9 +203,15 @@ static inline struct intel_device *intel_device(ScrnInfoPtr scrn)
 	return xf86GetEntityPrivate(scrn->entityList[0], intel_device_key)->ptr;
 }
 
+static const char *kernel_module_names[] ={
+	"i915",
+	NULL,
+};
+
 static int is_i915_device(int fd)
 {
 	drm_version_t version;
+	const char **kn;
 	char name[5] = "";
 
 	memset(&version, 0, sizeof(version));
@@ -215,7 +221,22 @@ static int is_i915_device(int fd)
 	if (drmIoctl(fd, DRM_IOCTL_VERSION, &version))
 		return 0;
 
-	return strcmp("i915", name) == 0;
+	for (kn = kernel_module_names; *kn; kn++)
+		if (strcmp(*kn, name) == 0)
+			return 1;
+
+	return 0;
+}
+
+static int load_i915_kernel_module(void)
+{
+	const char **kn;
+
+	for (kn = kernel_module_names; *kn; kn++)
+		if (xf86LoadKernelModule(*kn) == 0)
+			return 0;
+
+	return -1;
 }
 
 static int is_i915_gem(int fd)
@@ -342,7 +363,7 @@ static int __intel_open_device__pci(const struct pci_device *pci)
 
 		sprintf(path + base, "driver");
 		if (stat(path, &st)) {
-			if (xf86LoadKernelModule("i915"))
+			if (load_i915_kernel_module())
 				return -1;
 			(void)xf86LoadKernelModule("fbcon");
 		}
@@ -405,7 +426,7 @@ static int __intel_open_device__legacy(const struct pci_device *pci)
 
 	ret = drmCheckModesettingSupported(id);
 	if (ret) {
-		if (xf86LoadKernelModule("i915"))
+		if (load_i915_kernel_module() == 0)
 			ret = drmCheckModesettingSupported(id);
 		if (ret)
 			return -1;