From 71aa4adba363aa38f5dc23f034afb70d3d2e411a Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Wed, 1 Sep 2021 09:35:58 -0400
Subject: [PATCH] zink: fix PIPE_SHADER_CAP_FP16_DERIVATIVES handling

this requires 16bit io, not just alus

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12634>
---
 src/gallium/drivers/zink/zink_screen.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/zink/zink_screen.c b/src/gallium/drivers/zink/zink_screen.c
index 88922ee2db7..68856e29c51 100644
--- a/src/gallium/drivers/zink/zink_screen.c
+++ b/src/gallium/drivers/zink/zink_screen.c
@@ -816,8 +816,10 @@ zink_get_shader_param(struct pipe_screen *pscreen,
    case PIPE_SHADER_CAP_GLSL_16BIT_CONSTS:
       return 0; /* not implemented */
 
-   case PIPE_SHADER_CAP_FP16:
    case PIPE_SHADER_CAP_FP16_DERIVATIVES:
+      return screen->info.feats11.storageInputOutput16 ||
+             (screen->info.have_KHR_16bit_storage && screen->info.storage_16bit_feats.storageInputOutput16);
+   case PIPE_SHADER_CAP_FP16:
       return screen->info.feats12.shaderFloat16 ||
              (screen->info.have_KHR_shader_float16_int8 &&
               screen->info.shader_float16_int8_feats.shaderFloat16);