radv: enable VK_AMD_shader_ballot on GFX6-7 with both compiler backends

It gives +1-2 FPS with Doom Eternal on Pitcairn.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5659>

6 files changed, 7 insertions, 17 deletions

diff --git a/docs/envvars.rst b/docs/envvars.rst
index 3177347eab5..8ffec2cdac1 100644
--- a/docs/envvars.rst
+++ b/docs/envvars.rst
@@ -585,8 +585,6 @@ RADV driver environment variables
       enable local BOs
    ``pswave32``
       enable wave32 for pixel shaders (GFX10+)
-   ``shader_ballot``
-      enable shader ballot
    ``tccompatcmask``
       enable TC-compat cmask for MSAA images
 
diff --git a/src/amd/vulkan/radv_debug.h b/src/amd/vulkan/radv_debug.h
index df7d4d2374f..40ecf77cc84 100644
--- a/src/amd/vulkan/radv_debug.h
+++ b/src/amd/vulkan/radv_debug.h
@@ -62,12 +62,11 @@ enum {
 	RADV_PERFTEST_LOCAL_BOS       =    0x1,
 	RADV_PERFTEST_DCC_MSAA        =    0x2,
 	RADV_PERFTEST_BO_LIST         =    0x4,
-	RADV_PERFTEST_SHADER_BALLOT   =    0x8,
-	RADV_PERFTEST_TC_COMPAT_CMASK =   0x10,
-	RADV_PERFTEST_CS_WAVE_32      =   0x20,
-	RADV_PERFTEST_PS_WAVE_32      =   0x40,
-	RADV_PERFTEST_GE_WAVE_32      =   0x80,
-	RADV_PERFTEST_DFSM            =  0x100,
+	RADV_PERFTEST_TC_COMPAT_CMASK =    0x8,
+	RADV_PERFTEST_CS_WAVE_32      =   0x10,
+	RADV_PERFTEST_PS_WAVE_32      =   0x20,
+	RADV_PERFTEST_GE_WAVE_32      =   0x40,
+	RADV_PERFTEST_DFSM            =   0x80,
 };
 
 bool
diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index ef309249fd8..4401f39e77c 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -372,9 +372,6 @@ radv_physical_device_try_create(struct radv_instance *instance,
 	device->dcc_msaa_allowed =
 		(device->instance->perftest_flags & RADV_PERFTEST_DCC_MSAA);
 
-	device->use_shader_ballot = (!device->use_llvm && device->rad_info.chip_class >= GFX8) ||
-				    (device->instance->perftest_flags & RADV_PERFTEST_SHADER_BALLOT);
-
 	device->use_ngg = device->rad_info.chip_class >= GFX10 &&
 			  device->rad_info.family != CHIP_NAVI14 &&
 			  !(device->instance->debug_flags & RADV_DEBUG_NO_NGG);
@@ -520,7 +517,6 @@ static const struct debug_control radv_perftest_options[] = {
 	{"localbos", RADV_PERFTEST_LOCAL_BOS},
 	{"dccmsaa", RADV_PERFTEST_DCC_MSAA},
 	{"bolist", RADV_PERFTEST_BO_LIST},
-	{"shader_ballot", RADV_PERFTEST_SHADER_BALLOT},
 	{"tccompatcmask", RADV_PERFTEST_TC_COMPAT_CMASK},
 	{"cswave32", RADV_PERFTEST_CS_WAVE_32},
 	{"pswave32", RADV_PERFTEST_PS_WAVE_32},
diff --git a/src/amd/vulkan/radv_extensions.py b/src/amd/vulkan/radv_extensions.py
index 4027eec0c38..a390ffe556f 100644
--- a/src/amd/vulkan/radv_extensions.py
+++ b/src/amd/vulkan/radv_extensions.py
@@ -171,7 +171,7 @@ EXTENSIONS = [
     # Disable mixed attachment samples on GFX6-GFX7 until the CTS failures have been resolved.
     Extension('VK_AMD_mixed_attachment_samples',          1, 'device->rad_info.chip_class >= GFX8'),
     Extension('VK_AMD_rasterization_order',               1, 'device->rad_info.has_out_of_order_rast'),
-    Extension('VK_AMD_shader_ballot',                     1, 'device->use_shader_ballot'),
+    Extension('VK_AMD_shader_ballot',                     1, True),
     Extension('VK_AMD_shader_core_properties',            1, True),
     Extension('VK_AMD_shader_core_properties2',           1, True),
     Extension('VK_AMD_shader_explicit_vertex_parameter',  1, True),
diff --git a/src/amd/vulkan/radv_private.h b/src/amd/vulkan/radv_private.h
index 902893a7d40..17d83eaaaa8 100644
--- a/src/amd/vulkan/radv_private.h
+++ b/src/amd/vulkan/radv_private.h
@@ -294,9 +294,6 @@ struct radv_physical_device {
 	/* Whether DCC should be enabled for MSAA textures. */
 	bool dcc_msaa_allowed;
 
-	/* Whether to enable the AMD_shader_ballot extension */
-	bool use_shader_ballot;
-
 	/* Whether to enable NGG. */
 	bool use_ngg;
 
diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 2aa6b191699..0946560b833 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -365,7 +365,7 @@ radv_shader_compile_to_nir(struct radv_device *device,
 				.amd_gcn_shader = true,
 				.amd_image_gather_bias_lod = true,
 				.amd_image_read_write_lod = true,
-				.amd_shader_ballot = device->physical_device->use_shader_ballot,
+				.amd_shader_ballot = true,
 				.amd_shader_explicit_vertex_parameter = true,
 				.amd_trinary_minmax = true,
 				.demote_to_helper_invocation = true,