Mesa (master): radv: add has_clear_state and enable it on CIK+ only

[Samuel Pitoiset]

Module: Mesa
Branch: master
Commit: 65dcff7a26730e2e1112f7f326b941e3a3549870
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=65dcff7a26730e2e1112f7f326b941e3a3549870

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Thu Oct  5 14:55:24 2017 +0200

radv: add has_clear_state and enable it on CIK+ only

This will allow us to emit the CLEAR_STATE packet instead
of a bunch of useless packets when doing CS initialization.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Dave Airlie <airlied at redhat.com>

---

 src/amd/vulkan/radv_device.c  | 5 +++++
 src/amd/vulkan/radv_private.h | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 23f5e70321..b2aef2a813 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -401,6 +401,11 @@ radv_physical_device_init(struct radv_physical_device *device,
 		device->rbplus_allowed = device->rad_info.family == CHIP_STONEY;
 	}
 
+	/* The mere presense of CLEAR_STATE in the IB causes random GPU hangs
+	 * on SI.
+	 */
+	device->has_clear_state = device->rad_info.chip_class >= CIK;
+
 	return VK_SUCCESS;
 
 fail:
diff --git a/src/amd/vulkan/radv_private.h b/src/amd/vulkan/radv_private.h
index e673527811..e58fb2175e 100644
--- a/src/amd/vulkan/radv_private.h
+++ b/src/amd/vulkan/radv_private.h
@@ -277,7 +277,7 @@ struct radv_physical_device {
 
 	bool has_rbplus; /* if RB+ register exist */
 	bool rbplus_allowed; /* if RB+ is allowed */
-
+	bool has_clear_state;
 
 	/* This is the drivers on-disk cache used as a fallback as opposed to
 	 * the pipeline cache defined by apps.