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[ Upstream commitafcfb6c847] Call pm_runtime_resume_and_get() before accessing GCE hardware in mbox_send_message(), and invoke pm_runtime_put_autosuspend() in the cmdq callback to release the PM reference and start autosuspend for GCE. This ensures correct power management for the GCE device. Fixes:8afe816b0c("mailbox: mtk-cmdq-mailbox: Implement Runtime PM with autosuspend") Signed-off-by: Jason-JH Lin <jason-jh.lin@mediatek.com> Reviewed-by: CK Hu <ck.hu@mediatek.com> Link: https://patchwork.kernel.org/project/dri-devel/patch/20250829091727.3745415-3-jason-jh.lin@mediatek.com/ Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>