Mesa (master): wsi/x11: Wait for fences with IMMEDIATE on Xwayland

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Module: Mesa
Branch: master
Commit: 8ec530d9828e01ac12918c7abb9b4e4aaf9a38cf
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8ec530d9828e01ac12918c7abb9b4e4aaf9a38cf

Author: Michel Dänzer <mdaenzer at redhat.com>
Date:   Tue Apr  6 12:15:45 2021 +0200

wsi/x11: Wait for fences with IMMEDIATE on Xwayland

The commit below was already meant to do this, but accidentally missed
this part.

Fixes stutter when the frame-rate drops below the refresh rate.

Fixes: e8f50bd60087 "wsi/x11: Treat IMMEDIATE present mode the same as
                     MAILBOX for Xwayland"

Reviewed-by: Adam Jackson <ajax at redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10026>

---

 src/vulkan/wsi/wsi_common_x11.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/vulkan/wsi/wsi_common_x11.c b/src/vulkan/wsi/wsi_common_x11.c
index f899341f0cd..54769b81ccc 100644
--- a/src/vulkan/wsi/wsi_common_x11.c
+++ b/src/vulkan/wsi/wsi_common_x11.c
@@ -1202,6 +1202,8 @@ static void *
 x11_manage_fifo_queues(void *state)
 {
    struct x11_swapchain *chain = state;
+   struct wsi_x11_connection *wsi_conn =
+      wsi_x11_get_connection((struct wsi_device*)chain->base.wsi, chain->conn);
    VkResult result = VK_SUCCESS;
 
    assert(chain->has_present_queue);
@@ -1225,7 +1227,9 @@ x11_manage_fifo_queues(void *state)
          return NULL;
       }
 
-      if (chain->base.present_mode == VK_PRESENT_MODE_MAILBOX_KHR) {
+      if (chain->base.present_mode == VK_PRESENT_MODE_MAILBOX_KHR ||
+          (chain->base.present_mode == VK_PRESENT_MODE_IMMEDIATE_KHR &&
+           wsi_conn->is_xwayland)) {
          result = chain->base.wsi->WaitForFences(chain->base.device, 1,
                                         &chain->base.fences[image_index],
                                         true, UINT64_MAX);