diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_context.c | 4 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_device_info.h | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c index 6e3f0a08432..defcae521a8 100644 --- a/src/mesa/drivers/dri/i965/brw_context.c +++ b/src/mesa/drivers/dri/i965/brw_context.c @@ -934,6 +934,10 @@ brwCreateContext(gl_api api, screen->subslice_total > 0 && screen->eu_total > 0) { /* Logical CS threads = EUs per subslice * 7 threads per EU */ brw->max_cs_threads = screen->eu_total / screen->subslice_total * 7; + + /* Fuse configurations may give more threads than expected, never less. */ + if (brw->max_cs_threads < devinfo->max_cs_threads) + brw->max_cs_threads = devinfo->max_cs_threads; } else { brw->max_cs_threads = devinfo->max_cs_threads; } diff --git a/src/mesa/drivers/dri/i965/brw_device_info.h b/src/mesa/drivers/dri/i965/brw_device_info.h index 73d682083a1..5c9517eda0f 100644 --- a/src/mesa/drivers/dri/i965/brw_device_info.h +++ b/src/mesa/drivers/dri/i965/brw_device_info.h @@ -71,6 +71,11 @@ struct brw_device_info /** * Total number of slices present on the device whether or not they've been * fused off. + * + * XXX: CS thread counts are limited by the inability to do cross subslice + * communication. It is the effectively the number of logical threads which + * can be executed in a subslice. Fuse configurations may cause this number + * to change, so we program @max_cs_threads as the lower maximum. */ unsigned num_slices; unsigned max_vs_threads; |