[Bf-blender-cvs] [b4bddf2e3bd] tmp-2.83-cycles-rtx3-kernels: Fix OptiX being shown as available on first generation Maxwell GPUs

[Patrick Mours]

Commit: b4bddf2e3bd3e33a9ca7488fc78112f8a5fa0544
Author: Patrick Mours
Date:   Fri Jul 24 15:36:09 2020 +0200
Branches: tmp-2.83-cycles-rtx3-kernels
https://developer.blender.org/rBb4bddf2e3bd3e33a9ca7488fc78112f8a5fa0544

Fix OptiX being shown as available on first generation Maxwell GPUs

The OptiX kernels are compiled for target "compute_sm_52", which is only available on second
generation Maxwell GPUs, so disable support for older ones.

===================================================================

M	intern/cycles/device/device_optix.cpp

===================================================================

diff --git a/intern/cycles/device/device_optix.cpp b/intern/cycles/device/device_optix.cpp
index db04c13d083..2b28d1e1dbb 100644
--- a/intern/cycles/device/device_optix.cpp
+++ b/intern/cycles/device/device_optix.cpp
@@ -1543,10 +1543,11 @@ void device_optix_info(const vector<DeviceInfo> &cuda_devices, vector<DeviceInfo
   for (DeviceInfo info : cuda_devices) {
     assert(info.type == DEVICE_CUDA);
 
-    int major;
+    int major, minor;
     cuDeviceGetAttribute(&major, CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MAJOR, info.num);
-    if (major < 5) {
-      continue;  // Only Maxwell and up are supported by OptiX
+    cuDeviceGetAttribute(&minor, CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MINOR, info.num);
+    if (major < 5 || (major == 5 && minor < 2)) {
+      continue;  // Only Maxwell 2.0 and up are supported by OptiX
     }
 
     info.type = DEVICE_OPTIX;