anv: Update the HiZ sampling helper

Validate the inputs, verify that this image has a depth
buffer, use gen_device_info instead of

v2:
- Add parenthesis (Jason Ekstrand)
- Make parameters const
- Use gen_device_info instead of gen
- Pass aspect to missed function in transition_depth_buffer

Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/anv_blorp.c

@@ -1275,7 +1275,8 @@ anv_cmd_buffer_clear_subpass(struct anv_cmd_buffer *cmd_buffer)
                 */
                clear_with_hiz = false;
             } else if (gen == 8 &&
-                       anv_can_sample_with_hiz(cmd_buffer->device->info.gen,
+                       anv_can_sample_with_hiz(&cmd_buffer->device->info,
+                                               iview->aspect_mask,
                                                iview->image->samples)) {
                /* Only gen9+ supports returning ANV_HZ_FC_VAL when sampling a
                 * fast-cleared portion of a HiZ buffer. Testing has revealed

src/intel/vulkan/anv_image.c

@@ -483,7 +483,6 @@ anv_layout_to_aux_usage(const struct gen_device_info * const devinfo,
    if (devinfo->gen < 8 && aspects == VK_IMAGE_ASPECT_STENCIL_BIT)
       return ISL_AUX_USAGE_NONE;
 
-   const bool has_depth = aspects & VK_IMAGE_ASPECT_DEPTH_BIT;
    const bool color_aspect = aspects == VK_IMAGE_ASPECT_COLOR_BIT;
 
    /* The following switch currently only handles depth stencil aspects.
@@ -523,7 +522,7 @@ anv_layout_to_aux_usage(const struct gen_device_info * const devinfo,
       assert(!color_aspect);
       /* Fall-through */
    case VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL:
-      if (has_depth && anv_can_sample_with_hiz(devinfo->gen, image->samples))
+      if (anv_can_sample_with_hiz(devinfo, aspects, image->samples))
          return ISL_AUX_USAGE_HIZ;
       else
          return ISL_AUX_USAGE_NONE;
@@ -684,8 +683,8 @@ anv_CreateImageView(VkDevice _device,
    float red_clear_color = 0.0f;
    enum isl_aux_usage surf_usage = image->aux_usage;
    if (image->aux_usage == ISL_AUX_USAGE_HIZ) {
-      if (iview->aspect_mask & VK_IMAGE_ASPECT_DEPTH_BIT &&
+      if (anv_can_sample_with_hiz(&device->info, iview->aspect_mask,
-          anv_can_sample_with_hiz(device->info.gen, image->samples)) {
+                                  image->samples)) {
          /* When a HiZ buffer is sampled on gen9+, ensure that
           * the constant fast clear value is set in the surface state.
           */

src/intel/vulkan/anv_private.h

@@ -1767,9 +1767,14 @@ struct anv_image {
 
 /* Returns true if a HiZ-enabled depth buffer can be sampled from. */
 static inline bool
-anv_can_sample_with_hiz(uint8_t gen, uint32_t samples)
+anv_can_sample_with_hiz(const struct gen_device_info * const devinfo,
+                        const VkImageAspectFlags aspect_mask,
+                        const uint32_t samples)
 {
-   return gen >= 8 && samples == 1;
+   /* Validate the inputs. */
+   assert(devinfo && aspect_mask && samples);
+   return devinfo->gen >= 8 && (aspect_mask & VK_IMAGE_ASPECT_DEPTH_BIT) &&
+          samples == 1;
 }
 
 void

src/intel/vulkan/genX_cmd_buffer.c

@@ -383,7 +383,8 @@ transition_depth_buffer(struct anv_cmd_buffer *cmd_buffer,
     * required by this transition was not already a HiZ resolve.
     */
    if (final_layout == VK_IMAGE_LAYOUT_GENERAL &&
-       anv_can_sample_with_hiz(GEN_GEN, image->samples) &&
+       anv_can_sample_with_hiz(&cmd_buffer->device->info, image->aspects,
+                               image->samples) &&
        hiz_op != BLORP_HIZ_OP_HIZ_RESOLVE) {
       anv_gen8_hiz_op_resolve(cmd_buffer, image, BLORP_HIZ_OP_HIZ_RESOLVE);
    }