Mesa (master): radv: fix stencil only clears.

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 3c730639740f9b1243e95d06e6608cb54649be9a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3c730639740f9b1243e95d06e6608cb54649be9a

Author: Dave Airlie <airlied at redhat.com>
Date:   Tue May  2 15:29:28 2017 +1000

radv: fix stencil only clears.

If we are clearing stencil only, we still need to provide a
a valid Z output from the vertex shader, we can't rely
on the depth clear value having any meaning, as we use this
for the position output, and it could get clipped, so we
don't end up clearing anything.

Fixes:
dEQP-VK.renderpass.simple.stencil
since I added S8 support.

Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/amd/vulkan/radv_meta_clear.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/amd/vulkan/radv_meta_clear.c b/src/amd/vulkan/radv_meta_clear.c
index 190af651a1..2fa50cf0b5 100644
--- a/src/amd/vulkan/radv_meta_clear.c
+++ b/src/amd/vulkan/radv_meta_clear.c
@@ -672,6 +672,9 @@ emit_depthstencil_clear(struct radv_cmd_buffer *cmd_buffer,
 			   VK_IMAGE_ASPECT_STENCIL_BIT));
 	assert(pass_att != VK_ATTACHMENT_UNUSED);
 
+	if (!(aspects & VK_IMAGE_ASPECT_DEPTH_BIT))
+		clear_value.depth = 1.0f;
+
 	const struct depthstencil_clear_vattrs vertex_data[3] = {
 		{
 			.depth_clear = clear_value.depth,