From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Tue, 2 Oct 2018 03:18:00 +0000 (-0500)
Subject: iris: Don't lower image formats for write-only images
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d9aee25a466ba73a78a47e32f89777179e519931;p=mesa.git

iris: Don't lower image formats for write-only images
---

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index 3c33d0cc97f..51abda759ee 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -1533,7 +1533,9 @@ iris_set_shader_images(struct pipe_context *ctx,
          isl_surf_usage_flags_t usage = ISL_SURF_USAGE_STORAGE_BIT;
          enum isl_format isl_format =
             iris_format_for_usage(devinfo, img->format, usage).fmt;
-         isl_format = isl_lower_storage_image_format(devinfo, isl_format);
+
+         if (img->shader_access & PIPE_IMAGE_ACCESS_READ)
+            isl_format = isl_lower_storage_image_format(devinfo, isl_format);
 
          if (res->base.target != PIPE_BUFFER) {
             struct isl_view view = {