Mesa (19.1): anv/cmd_buffer: Initalize the clear color struct for CNL+

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Module: Mesa
Branch: 19.1
Commit: 7ca66dc06bf575ece317c2e53ed8a4e29fe8013e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7ca66dc06bf575ece317c2e53ed8a4e29fe8013e

Author: Nanley Chery <nanley.g.chery at intel.com>
Date:   Wed Oct 24 14:50:32 2018 -0700

anv/cmd_buffer: Initalize the clear color struct for CNL+

On CNL+, the clear color struct is composed of RGBA channel values and
fields which are either reserved by the HW or used to control
fast-clears. Currently anv initializes the channel values to zero and
allows the other fields to be undefined.

Satisfy the MBZ field requirements by removing an optimization that
doesn't hold true for CNL+ and pulling in the number of dwords to
initialize from ISL.

Cc: <mesa-stable at lists.freedesktop.org>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
(cherry picked from commit b4198e792c037dccb4d433abc1368bd8cc8d22ee)

---

 src/intel/vulkan/genX_cmd_buffer.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
index 1af36bced24..6b4db729819 100644
--- a/src/intel/vulkan/genX_cmd_buffer.c
+++ b/src/intel/vulkan/genX_cmd_buffer.c
@@ -762,27 +762,21 @@ init_fast_clear_color(struct anv_cmd_buffer *cmd_buffer,
    set_image_fast_clear_state(cmd_buffer, image, aspect,
                               ANV_FAST_CLEAR_NONE);
 
-   /* The fast clear value dword(s) will be copied into a surface state object.
-    * Ensure that the restrictions of the fields in the dword(s) are followed.
-    *
-    * CCS buffers on SKL+ can have any value set for the clear colors.
-    */
-   if (image->samples == 1 && GEN_GEN >= 9)
-      return;
-
-   /* Other combinations of auxiliary buffers and platforms require specific
-    * values in the clear value dword(s).
+   /* Initialize the struct fields that are accessed for fast-clears so that
+    * the HW restrictions on the field values are satisfied.
     */
    struct anv_address addr =
       anv_image_get_clear_color_addr(cmd_buffer->device, image, aspect);
 
    if (GEN_GEN >= 9) {
-      for (unsigned i = 0; i < 4; i++) {
+      const struct isl_device *isl_dev = &cmd_buffer->device->isl_dev;
+      const unsigned num_dwords = GEN_GEN >= 10 ?
+                                  isl_dev->ss.clear_color_state_size / 4 :
+                                  isl_dev->ss.clear_value_size / 4;
+      for (unsigned i = 0; i < num_dwords; i++) {
          anv_batch_emit(&cmd_buffer->batch, GENX(MI_STORE_DATA_IMM), sdi) {
             sdi.Address = addr;
             sdi.Address.offset += i * 4;
-            /* MCS buffers on SKL+ can only have 1/0 clear colors. */
-            assert(image->samples > 1);
             sdi.ImmediateData = 0;
          }
       }