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iris: ensure mesh is disabled on context init

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It turns out the hardware doesn't save the whole state on a context
switch, as the kernel expects when it creates the golden context.
For some HW units, only the state that was explicitly programmed will be
part of it, so we need to make sure mesh shading is disabled on context
creation, or we risk being context switched with an application that
uses mesh, and when ours gets to run again, the mesh state won't be
reset, and submitting a legacy 3D pipeline while the HW thinks mesh is
enabled causes us to hang.

Cc: 23.2 <mesa-stable>

Reviewed-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24150>
This commit is contained in:
Iván Briano 2023-07-05 15:40:52 -07:00 • committed by Marge Bot
parent f48aa460a2
commit 50d68f74b5
1 changed files with 5 additions and 0 deletions
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5
src/gallium/drivers/iris/iris_state.c
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@ -1339,6 +1339,11 @@ iris_init_render_context(struct iris_batch *batch)
/* TODO: may need to set an offset for origin-UL framebuffers */
iris_emit_cmd(batch, GENX(3DSTATE_POLY_STIPPLE_OFFSET), foo);
#if GFX_VERx10 >= 125
iris_emit_cmd(batch, GENX(3DSTATE_MESH_CONTROL), foo);
iris_emit_cmd(batch, GENX(3DSTATE_TASK_CONTROL), foo);
#endif
iris_alloc_push_constants(batch);