[Mesa-stable] [PATCH 2/3] i965: Set subslice_total on Haswell.

[Kenneth Graunke]

We'll use this for compute shader thread counts shortly.

Cc: "12.0" <mesa-stable at lists.freedesktop.org>
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/intel_screen.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

I'm not sure whether I want to commit this or not...there still seem to
be some issues on Haswell.  I think this is right, but maybe there are
just other bugs.

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index fb06e25..9ed4da6 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -1565,8 +1565,11 @@ __DRIconfig **intelInitScreen2(__DRIscreen *psp)
    intelScreen->hw_has_timestamp = intel_detect_timestamp(intelScreen);
 
    /* GENs prior to 8 do not support EU/Subslice info */
-   if (intelScreen->devinfo->gen >= 8)
+   if (intelScreen->devinfo->gen >= 8) {
       intel_detect_sseu(intelScreen);
+   } else if (intelScreen->devinfo->is_haswell) {
+      intelScreen->subslice_total = 1 << (intelScreen->devinfo->gt - 1);
+   }
 
    const char *force_msaa = getenv("INTEL_FORCE_MSAA");
    if (force_msaa) {
-- 
2.8.3