radeonsi/gfx12: set DB_RENDER_OVERRIDE based on stencil state

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32653>

src/amd/common/ac_cmdbuf.c

@@ -605,7 +605,6 @@ gfx12_init_graphics_preamble_state(const struct ac_preamble_state *state,
    ac_pm4_set_reg(pm4, R_00B4D4_SPI_SHADER_USER_ACCUM_LSHS_3, 0);
 
    /* Context registers */
-   ac_pm4_set_reg(pm4, R_02800C_DB_RENDER_OVERRIDE, S_02800C_FORCE_STENCIL_READ(1));
    ac_pm4_set_reg(pm4, R_028040_DB_GL1_INTERFACE_CONTROL, 0);
    ac_pm4_set_reg(pm4, R_028048_DB_MEM_TEMPORAL,
                   S_028048_Z_TEMPORAL_READ(zs_read_temporal_hint) |

src/amd/vulkan/radv_queue.c

@@ -886,6 +886,10 @@ radv_emit_graphics(struct radv_device *device, struct radeon_cmdbuf *cs)
 
    if (pdev->info.gfx_level >= GFX12) {
       radeon_set_context_reg(cs, R_028000_DB_RENDER_CONTROL, 0);
+      radeon_set_context_reg(cs, R_02800C_DB_RENDER_OVERRIDE,
+                             S_02800C_FORCE_STENCIL_READ(1) |
+                                /* TODO: this should be conditional based on stencil state */
+                                S_02800C_FORCE_STENCIL_VALID(1));
    }
 
    ac_pm4_finalize(pm4);