ASoC: SOF: Add FW state to debugfs

[ Upstream commit c828a3cbd71370da5a474d8634e733a81ce57f58 ]

Allow system health detection mechanisms to check the FW state, this
will allow them to check if the FW is in its "crashed" state going
forward to help automatically diagnose driver state.

Signed-off-by: Curtis Malainey <cujomalainey@chromium.org>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20221220125629.8469-4-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c
index d9a3ce7b69e16cf03b73adc64d93a61293aed724..ade0507328af4bf9c7d6be10cbdd433fc13ac091 100644 (file)
--- a/sound/soc/sof/debug.c
+++ b/sound/soc/sof/debug.c
@@ -353,7 +353,9 @@ int snd_sof_dbg_init(struct snd_sof_dev *sdev)
                        return err;
        }
 
-       return 0;
+       return snd_sof_debugfs_buf_item(sdev, &sdev->fw_state,
+                                       sizeof(sdev->fw_state),
+                                       "fw_state", 0444);
 }
 EXPORT_SYMBOL_GPL(snd_sof_dbg_init);