diff options
| author | Kai Vehmanen <kai.vehmanen@linux.intel.com> | 2019-05-24 14:23:06 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-05-28 15:52:34 +0100 |
| commit | ec9025e5d3c5b5f2027fa74be6afdaad9908b546 (patch) | |
| tree | fb6d5d7973c2afdec6ca5d63f95c740c76dd21de /sound/soc/sof/sof-priv.h | |
| parent | f627b0524ccf993b646bd56f9bdacc973c8c39cc (diff) | |
| download | lwn-ec9025e5d3c5b5f2027fa74be6afdaad9908b546.tar.gz lwn-ec9025e5d3c5b5f2027fa74be6afdaad9908b546.zip | |
ASoC: SOF: force end-of-file for debugfs trace at suspend
Current trace implementation gets out of sync when sof device
is put to suspend. The debugfs file handle is kept open, but
firmware will reset its state. After resume, debugfs client's
read offset will not be synchronized to firmware and this may
result in traces read in incorrect order and/or stale data being
read after resume.
Add logic to signal end-of-file to read() when firmware tracing
has ended, and all trace data has been read. This allows debugfs
client to capture all trace data, and reopen the trace file to
ensure proper synchronization with firmware after reopening
the node.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sof/sof-priv.h')
| -rw-r--r-- | sound/soc/sof/sof-priv.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index 1e85d6f9c5c3..01a6219c326b 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -417,6 +417,8 @@ struct snd_sof_dev { u32 host_offset; u32 dtrace_is_enabled; u32 dtrace_error; + u32 dtrace_draining; + u32 msi_enabled; void *private; /* core does not touch this */ |