From 3ce4504da790c63ac81798331b1a03ab6263a942 Mon Sep 17 00:00:00 2001
From: Mel Henning <mhenning@darkrefraction.com>
Date: Wed, 6 Aug 2025 18:10:08 -0400
Subject: [PATCH] nouveau/winsys: Set channel_alloc.tt_ctxdma_handle

Reviewed-by: Thomas H.P. Andersen <phomes@gmail.com>
Reviewed-by: Mary Guillemard <mary@mary.zone>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36617>
---
 src/nouveau/winsys/nouveau_context.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/nouveau/winsys/nouveau_context.c b/src/nouveau/winsys/nouveau_context.c
index 818386049b0..8c30d60a122 100644
--- a/src/nouveau/winsys/nouveau_context.c
+++ b/src/nouveau/winsys/nouveau_context.c
@@ -132,6 +132,13 @@ nouveau_ws_3d_context_init(struct nouveau_ws_device *dev,
    uint32_t classes[NOUVEAU_WS_CONTEXT_MAX_CLASSES];
    uint32_t base;
 
+   req.fb_ctxdma_handle = 0xffffffff;
+   if (engines == NOUVEAU_WS_ENGINE_COPY && dev->info.has_transfer_queue) {
+      req.tt_ctxdma_handle = NOUVEAU_FIFO_ENGINE_CE;
+   } else {
+      req.tt_ctxdma_handle = NOUVEAU_FIFO_ENGINE_GR;
+   }
+
    int ret = drmCommandWriteRead(dev->fd, DRM_NOUVEAU_CHANNEL_ALLOC, &req, sizeof(req));
    if (ret)
       return ret;