[Mesa-dev] [PATCH 3/4] radv: add has_clear_state and enable it on CIK+ only

[Samuel Pitoiset]

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

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index e07a573819..5a195f438d 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -389,6 +389,11 @@ 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 4d2b2c696b..316e28dc74 100644
--- a/src/amd/vulkan/radv_private.h
+++ b/src/amd/vulkan/radv_private.h
@@ -277,6 +277,7 @@ struct radv_physical_device {
 
 	bool has_rbplus; /* if RB+ register exist */
 	bool rbplus_allowed; /* if RB+ is allowed */
+	bool has_clear_state;
 };
 
 struct radv_instance {
-- 
2.14.2