vk: Remove dummy anv_depth_stencil_view

1 files changed, 51 insertions, 29 deletions

diff --git a/src/vulkan/gen8_cmd_buffer.c b/src/vulkan/gen8_cmd_buffer.c
index 37a53c00156..57f061b9e8f 100644
--- a/src/vulkan/gen8_cmd_buffer.c
+++ b/src/vulkan/gen8_cmd_buffer.c
@@ -460,50 +460,72 @@ gen8_cmd_buffer_emit_depth_stencil(struct anv_cmd_buffer *cmd_buffer)
 {
    struct anv_subpass *subpass = cmd_buffer->state.subpass;
    struct anv_framebuffer *fb = cmd_buffer->state.framebuffer;
-   const struct anv_depth_stencil_view *view;
-
-   static const struct anv_depth_stencil_view null_view =
-      { .depth_format = D16_UNORM, .depth_stride = 0, .stencil_stride = 0 };
+   const struct anv_depth_stencil_view *view = NULL;
 
    if (subpass->depth_stencil_attachment != VK_ATTACHMENT_UNUSED) {
       const struct anv_attachment_view *aview =
          fb->attachments[subpass->depth_stencil_attachment];
       assert(aview->attachment_type == ANV_ATTACHMENT_VIEW_TYPE_DEPTH_STENCIL);
       view = (const struct anv_depth_stencil_view *)aview;
-   } else {
-      view = &null_view;
    }
 
    /* FIXME: Implement the PMA stall W/A */
    /* FIXME: Width and Height are wrong */
 
-   anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_DEPTH_BUFFER,
-                  .SurfaceType = SURFTYPE_2D,
-                  .DepthWriteEnable = view->depth_stride > 0,
-                  .StencilWriteEnable = view->stencil_stride > 0,
-                  .HierarchicalDepthBufferEnable = false,
-                  .SurfaceFormat = view->depth_format,
-                  .SurfacePitch = view->depth_stride > 0 ? view->depth_stride - 1 : 0,
-                  .SurfaceBaseAddress = { view->bo,  view->depth_offset },
-                  .Height = cmd_buffer->state.framebuffer->height - 1,
-                  .Width = cmd_buffer->state.framebuffer->width - 1,
-                  .LOD = 0,
-                  .Depth = 1 - 1,
-                  .MinimumArrayElement = 0,
-                  .DepthBufferObjectControlState = GEN8_MOCS,
-                  .RenderTargetViewExtent = 1 - 1,
-                  .SurfaceQPitch = view->depth_qpitch >> 2);
+   if (view) {
+      anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_DEPTH_BUFFER,
+         .SurfaceType = SURFTYPE_2D,
+         .DepthWriteEnable = view->depth_stride > 0,
+         .StencilWriteEnable = view->stencil_stride > 0,
+         .HierarchicalDepthBufferEnable = false,
+         .SurfaceFormat = view->depth_format,
+         .SurfacePitch = view->depth_stride > 0 ? view->depth_stride - 1 : 0,
+         .SurfaceBaseAddress = { view->bo,  view->depth_offset },
+         .Height = fb->height - 1,
+         .Width = fb->width - 1,
+         .LOD = 0,
+         .Depth = 1 - 1,
+         .MinimumArrayElement = 0,
+         .DepthBufferObjectControlState = GEN8_MOCS,
+         .RenderTargetViewExtent = 1 - 1,
+         .SurfaceQPitch = view->depth_qpitch >> 2);
+
+      anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_STENCIL_BUFFER,
+         .StencilBufferEnable = view->stencil_stride > 0,
+         .StencilBufferObjectControlState = GEN8_MOCS,
+         .SurfacePitch = view->stencil_stride > 0 ? view->stencil_stride - 1 : 0,
+         .SurfaceBaseAddress = { view->bo, view->stencil_offset },
+         .SurfaceQPitch = view->stencil_qpitch >> 2);
+   } else {
+      /* Even when no depth buffer is present, the hardware requires that
+       * 3DSTATE_DEPTH_BUFFER be programmed correctly. The Broadwell PRM says:
+       *
+       *    If a null depth buffer is bound, the driver must instead bind depth as:
+       *       3DSTATE_DEPTH.SurfaceType = SURFTYPE_2D
+       *       3DSTATE_DEPTH.Width = 1
+       *       3DSTATE_DEPTH.Height = 1
+       *       3DSTATE_DEPTH.SuraceFormat = D16_UNORM
+       *       3DSTATE_DEPTH.SurfaceBaseAddress = 0
+       *       3DSTATE_DEPTH.HierarchicalDepthBufferEnable = 0
+       *       3DSTATE_WM_DEPTH_STENCIL.DepthTestEnable = 0
+       *       3DSTATE_WM_DEPTH_STENCIL.DepthBufferWriteEnable = 0
+       *
+       * The PRM is wrong, though. The width and height must be programmed to
+       * actual framebuffer's width and height.
+       */
+      anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_DEPTH_BUFFER,
+         .SurfaceType = SURFTYPE_2D,
+         .SurfaceFormat = D16_UNORM,
+         .Width = fb->width - 1,
+         .Height = fb->height - 1);
+
+      /* Disable the stencil buffer. */
+      anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_STENCIL_BUFFER);
+   }
 
    /* Disable hierarchial depth buffers. */
    anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_HIER_DEPTH_BUFFER);
 
-   anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_STENCIL_BUFFER,
-                  .StencilBufferEnable = view->stencil_stride > 0,
-                  .StencilBufferObjectControlState = GEN8_MOCS,
-                  .SurfacePitch = view->stencil_stride > 0 ? view->stencil_stride - 1 : 0,
-                  .SurfaceBaseAddress = { view->bo, view->stencil_offset },
-                  .SurfaceQPitch = view->stencil_qpitch >> 2);
-
    /* Clear the clear params. */
    anv_batch_emit(&cmd_buffer->batch, GEN8_3DSTATE_CLEAR_PARAMS);
 }