lavapipe: disable stencil test if no stencil attachment

stencil test must not be enabled if there is no stencil attachment

fixes dEQP-VK.pipeline.*.stencil.no_stencil_att.dynamic_rendering.*

fixes #10990

cc: mesa-stable

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28772>
(cherry picked from commit fc691d9)

Author: zmike

.pick_status.json

@@ -1614,7 +1614,7 @@
         "description": "lavapipe: disable stencil test if no stencil attachment",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null

src/gallium/frontends/lavapipe/lvp_execute.c

@@ -88,6 +88,7 @@ struct rendering_state {
    bool blend_dirty;
    bool rs_dirty;
    bool dsa_dirty;
+   bool dsa_no_stencil;
    bool stencil_ref_dirty;
    bool clip_state_dirty;
    bool blend_color_dirty;
@@ -470,8 +471,16 @@ static void emit_state(struct rendering_state *state)
    }
 
    if (state->dsa_dirty) {
+      bool s0_enabled = state->dsa_state.stencil[0].enabled;
+      bool s1_enabled = state->dsa_state.stencil[1].enabled;
+      if (state->dsa_no_stencil) {
+         state->dsa_state.stencil[0].enabled = false;
+         state->dsa_state.stencil[1].enabled = false;
+      }
       cso_set_depth_stencil_alpha(state->cso, &state->dsa_state);
       state->dsa_dirty = false;
+      state->dsa_state.stencil[0].enabled = s0_enabled;
+      state->dsa_state.stencil[1].enabled = s1_enabled;
    }
 
    if (state->sample_mask_dirty) {
@@ -1784,6 +1793,8 @@ handle_begin_rendering(struct vk_cmd_queue_entry *cmd,
 
    render_att_init(&state->depth_att, info->pDepthAttachment, state->poison_mem, false);
    render_att_init(&state->stencil_att, info->pStencilAttachment, state->poison_mem, true);
+   state->dsa_no_stencil = !state->stencil_att.imgv;
+   state->dsa_dirty = true;
    if (state->depth_att.imgv || state->stencil_att.imgv) {
       assert(state->depth_att.imgv == NULL ||
              state->stencil_att.imgv == NULL ||