From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Thu, 18 May 2017 18:30:47 +0000 (-0700)
Subject: anv: Handle transitioning depth from UNDEFINED to other layouts
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cc45c4bb8072b6593812f9b68a7b3d2d00bfb9f0;p=mesa.git

anv: Handle transitioning depth from UNDEFINED to other layouts

Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Cc: "17.1" <mesa-stable@lists.freedesktop.org>
---

diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
index d21e055f020..c3e2cb51d8e 100644
--- a/src/intel/vulkan/anv_image.c
+++ b/src/intel/vulkan/anv_image.c
@@ -423,12 +423,10 @@ void anv_GetImageSubresourceLayout(
 }
 
 /**
- * This function determines the optimal buffer to use for device
- * accesses given a VkImageLayout and other pieces of information needed to
- * make that determination. This does not determine the optimal buffer to
- * use during a resolve operation.
- *
- * NOTE: Some layouts do not support device access.
+ * This function determines the optimal buffer to use for a given
+ * VkImageLayout and other pieces of information needed to make that
+ * determination. This does not determine the optimal buffer to use
+ * during a resolve operation.
  *
  * @param devinfo The device information of the Intel GPU.
  * @param image The image that may contain a collection of buffers.
@@ -484,15 +482,19 @@ anv_layout_to_aux_usage(const struct gen_device_info * const devinfo,
    switch (layout) {
 
    /* Invalid Layouts */
+   case VK_IMAGE_LAYOUT_RANGE_SIZE:
+   case VK_IMAGE_LAYOUT_MAX_ENUM:
+      unreachable("Invalid image layout.");
 
-   /* According to the Vulkan Spec, the following layouts are valid only as
-    * initial layouts in a layout transition and don't support device access.
+   /* Undefined layouts
+    *
+    * The pre-initialized layout is equivalent to the undefined layout for
+    * optimally-tiled images.  We can only do color compression (CCS or HiZ)
+    * on tiled images.
     */
    case VK_IMAGE_LAYOUT_UNDEFINED:
    case VK_IMAGE_LAYOUT_PREINITIALIZED:
-   case VK_IMAGE_LAYOUT_RANGE_SIZE:
-   case VK_IMAGE_LAYOUT_MAX_ENUM:
-      unreachable("Invalid image layout for device access.");
+      return ISL_AUX_USAGE_NONE;
 
 
    /* Transfer Layouts
diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
index 79af9aad82c..0bb6d8e782c 100644
--- a/src/intel/vulkan/genX_cmd_buffer.c
+++ b/src/intel/vulkan/genX_cmd_buffer.c
@@ -355,15 +355,8 @@ transition_depth_buffer(struct anv_cmd_buffer *cmd_buffer,
     * The undefined layout indicates that the user doesn't care about the data
     * that's currently in the buffer. Therefore, a data-preserving resolve
     * operation is not needed.
-    *
-    * The pre-initialized layout is equivalent to the undefined layout for
-    * optimally-tiled images. Anv only exposes support for optimally-tiled
-    * depth buffers.
     */
-   if (image->aux_usage != ISL_AUX_USAGE_HIZ ||
-       initial_layout == final_layout ||
-       initial_layout == VK_IMAGE_LAYOUT_UNDEFINED ||
-       initial_layout == VK_IMAGE_LAYOUT_PREINITIALIZED)
+   if (image->aux_usage != ISL_AUX_USAGE_HIZ || initial_layout == final_layout)
       return;
 
    const bool hiz_enabled = ISL_AUX_USAGE_HIZ ==
@@ -404,6 +397,11 @@ transition_color_buffer(struct anv_cmd_buffer *cmd_buffer,
       return;
 
 #if GEN_GEN >= 9
+   /* We're transitioning from an undefined layout so it doesn't really matter
+    * what data ends up in the color buffer.  We do, however, need to ensure
+    * that the CCS has valid data in it.  One easy way to do that is to
+    * fast-clear the specified range.
+    */
    anv_image_ccs_clear(cmd_buffer, image, view, subresourceRange);
 #endif
 }