Start the display via bsp_display_start_with_config with a 16 KB LVGL
task stack. The 8 KB default overflows once LV_INV_BUF_SIZE is raised to
128 (the partial-flush path's stack frame scales with it) — the guard
fires as a "Stack protection fault" boot loop otherwise.
Add FACE_LOADTEST (gated off): a load-emulation harness that cycles
isolated load types — a render-only face ladder, light/heavy render plus
a network stream, render plus playback, and all three stacked. Each
phase logs a marker and shows an on-screen label. It pinned the blue
flicker to a DSI PSRAM-bandwidth underrun (the driver logs "underrun
happens"), which is serial-verifiable without eyes on the screen. Kept
for future bus-contention debugging.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LKPbR6DY2JygHbyLjxm7Uu
jpmschweitzerandClaude Opus 4.8
d1e1250016