[Mesa-dev] [PATCH] radv: set DISABLE_CONSTANT_ENCODE_REG to 1 for Raven2

[Samuel Pitoiset]

Ported from RadeonSI, will be emitted for GFX10 too.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/amd/vulkan/radv_cmd_buffer.c | 5 ++++-
 src/amd/vulkan/radv_device.c     | 2 ++
 src/amd/vulkan/radv_private.h    | 3 +++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 215ccced144..45c4d20e4fe 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -1876,6 +1876,8 @@ radv_emit_framebuffer_state(struct radv_cmd_buffer *cmd_buffer)
 			       S_028208_BR_Y(framebuffer->height));
 
 	if (cmd_buffer->device->physical_device->rad_info.chip_class >= GFX8) {
+		bool disable_constant_encode =
+			cmd_buffer->device->physical_device->has_dcc_constant_encode;
 		uint8_t watermark = 4; /* Default value for GFX8. */
 
 		/* For optimal DCC performance. */
@@ -1889,7 +1891,8 @@ radv_emit_framebuffer_state(struct radv_cmd_buffer *cmd_buffer)
 
 		radeon_set_context_reg(cmd_buffer->cs, R_028424_CB_DCC_CONTROL,
 				       S_028424_OVERWRITE_COMBINER_MRT_SHARING_DISABLE(1) |
-				       S_028424_OVERWRITE_COMBINER_WATERMARK(watermark));
+				       S_028424_OVERWRITE_COMBINER_WATERMARK(watermark) |
+				       S_028424_DISABLE_CONSTANT_ENCODE_REG(disable_constant_encode));
 	}
 
 	if (cmd_buffer->device->dfsm_allowed) {
diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 26b31cff9f1..f12b8bde1f9 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -371,6 +371,8 @@ radv_physical_device_init(struct radv_physical_device *device,
 				       (device->rad_info.chip_class >= GFX8 &&
 				        device->rad_info.me_fw_feature >= 41);
 
+	device->has_dcc_constant_encode = device->rad_info.family == CHIP_RAVEN2;
+
 	device->use_shader_ballot = device->instance->perftest_flags & RADV_PERFTEST_SHADER_BALLOT;
 
 	radv_physical_device_init_mem_types(device);
diff --git a/src/amd/vulkan/radv_private.h b/src/amd/vulkan/radv_private.h
index 1249ad0445d..c983be0d378 100644
--- a/src/amd/vulkan/radv_private.h
+++ b/src/amd/vulkan/radv_private.h
@@ -319,6 +319,9 @@ struct radv_physical_device {
 	/* Whether to enable the AMD_shader_ballot extension */
 	bool use_shader_ballot;
 
+	/* Whether DISABLE_CONSTANT_ENCODE_REG is supported. */
+	bool has_dcc_constant_encode;
+
 	/* This is the drivers on-disk cache used as a fallback as opposed to
 	 * the pipeline cache defined by apps.
 	 */
-- 
2.22.0