From cabcbb4db0fcc6bc204169b1ba0deca4561e67ee Mon Sep 17 00:00:00 2001
From: Ross Zwisler <zwisler@chromium.org>
Date: Wed, 18 Dec 2019 19:56:24 -0700
Subject: [PATCH] intel: limit shader geometry on BDW GT1

Similar to the SKL GT1 fix introduced here:

https://gitlab.freedesktop.org/asimiklit/mesa/commit/b1ba7ffdbd54fdb5da18d086c7b7a830e06a1cff

we need to limit the .urb.max_entries[MESA_SHADER_GEOMETRY] on BDW GT1
to address failures in these two tests:

dEQP-GLES31.functional.geometry_shading.layered.render_with_default_layer_3d
dEQP-GLES31.functional.geometry_shading.layered.render_with_default_layer_2d_array

The value 690 was found via bisection.  691 is the actual max on the
hardware I'm using, but 690 seemed like a nice round number.

Signed-off-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3173>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3173>

BUG=b:140204925
TEST=./cts-tradefed run cts --module CtsDeqpTestCases -s dut:22
(cherry picked from commit cabcbb4db0fcc6bc204169b1ba0deca4561e67ee)
---
 src/intel/dev/gen_device_info.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/intel/dev/gen_device_info.c b/src/intel/dev/gen_device_info.c
index 23306475b3e..520b87073a7 100644
--- a/src/intel/dev/gen_device_info.c
+++ b/src/intel/dev/gen_device_info.c
@@ -446,7 +446,8 @@ static const struct gen_device_info gen_device_info_bdw_gt1 = {
          [MESA_SHADER_VERTEX]    = 2560,
          [MESA_SHADER_TESS_CTRL] = 504,
          [MESA_SHADER_TESS_EVAL] = 1536,
-         [MESA_SHADER_GEOMETRY]  = 960,
+         /* Reduced from 960, seems to be similar to the bug on Gen9 GT1. */
+         [MESA_SHADER_GEOMETRY]  = 690,
       },
    },
    .simulator_id = 11,
-- 
2.24.1.735.g03f4e72817-goog