From 9a06508bf7824ba34f2e1e9e08df505ac14a44c2 Mon Sep 17 00:00:00 2001 From: Liam Girdwood Date: Fri, 27 Sep 2019 15:05:29 -0500 Subject: ASoC: SOF: ipc: retain DSP context after FW exception. Add config option to prevent DSP entering D3 after any FW exception. This can then be used to dump FW context for debug. Signed-off-by: Liam Girdwood Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20190927200538.660-5-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/debug.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'sound/soc/sof/debug.c') diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c index 54cd431faab7..b8a4e899154c 100644 --- a/sound/soc/sof/debug.c +++ b/sound/soc/sof/debug.c @@ -461,3 +461,19 @@ void snd_sof_free_debug(struct snd_sof_dev *sdev) debugfs_remove_recursive(sdev->debugfs_root); } EXPORT_SYMBOL_GPL(snd_sof_free_debug); + +void snd_sof_handle_fw_exception(struct snd_sof_dev *sdev) +{ + if (IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_RETAIN_DSP_CONTEXT) || + (sof_core_debug & SOF_DBG_RETAIN_CTX)) { + /* should we prevent DSP entering D3 ? */ + dev_info(sdev->dev, "info: preventing DSP entering D3 state to preserve context\n"); + pm_runtime_get_noresume(sdev->dev); + } + + /* dump vital information to the logs */ + snd_sof_dsp_dbg_dump(sdev, SOF_DBG_REGS | SOF_DBG_MBOX); + snd_sof_ipc_dump(sdev); + snd_sof_trace_notify_for_error(sdev); +} +EXPORT_SYMBOL(snd_sof_handle_fw_exception); -- cgit v1.2.3