[Mesa-dev] [PATCH] radv: Initialize DCC on transition from preinitialized.

[Bas Nieuwenhuizen]

Looks like the decompress does not handle invalid encodings well,
which happens with random memory. Of course apps should not use it
with random memory, but they are allowed to ....

Fixes: 44fcf58744 "radv: Disable DCC for GENERAL layout and compute transfer dest."
---
 src/amd/vulkan/radv_cmd_buffer.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index fb48691ca1..3f601d1731 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -3989,7 +3989,9 @@ static void radv_handle_dcc_image_transition(struct radv_cmd_buffer *cmd_buffer,
 					     unsigned dst_queue_mask,
 					     const VkImageSubresourceRange *range)
 {
-	if (src_layout == VK_IMAGE_LAYOUT_UNDEFINED) {
+	if (src_layout == VK_IMAGE_LAYOUT_PREINITIALIZED) {
+		radv_initialize_dcc(cmd_buffer, image, 0xffffffffu);
+	} else if (src_layout == VK_IMAGE_LAYOUT_UNDEFINED) {
 		radv_initialize_dcc(cmd_buffer, image,
 		                    radv_layout_dcc_compressed(image, dst_layout, dst_queue_mask) ?
 		                         0x20202020u : 0xffffffffu);
-- 
2.15.1