This patch adds drm_panic support for hyperv-drm driver. This function works but it's still needed to brush up. Let me hear your opinions.
Once kernel panic occurs we expect to see a panic screen. However, to see the screen, I need to close/re-open the graphic console client window. As the panic screen shows correctly in the small preview window in Hyper-V manager and debugfs API for drm_panic works correctly, I think kernel needs to send signal to Hyper-V host that the console client refreshes, but I have no idea what kind of signal is needed. This patch is tested on Hyper-V 2022. v2: - Re-write codes with regular atomic helper. The driver was implemented with simple KMS. So replace it with regular atomic helper in [1], implement this feature on it. [1] https://lore.kernel.org/all/20250427101825.812766-1-ryasu...@redhat.com/ v1: https://lore.kernel.org/lkml/20250402084351.1545536-1-ryasu...@redhat.com/ Ryosuke Yasuoka (1): drm/hyperv: Add support for drm_panic drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 36 +++++++++++++++++++++ 1 file changed, 36 insertions(+) base-commit: c06cb85ad1412c6ff34792b028b2f89495761398 -- 2.49.0
