kernel/linux.git/sound/soc/sof/trace.c, branch v5.15.209

ASoC: SOF: trace: Omit error print when waking up trace sleepers

2021-09-17T12:16:36+00:00

Do not print error message from snd_sof_trace_notify_for_error() when possible sleeping trace work is woken up to flush the remaining debug information. This action by itself is not an error, it is just an action we take when an error occurs to make sure that all information have been fed to the userspace (if we have trace in use). Signed-off-by: Peter Ujfalusi Reviewed-by: Ranjani Sridharan Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20210917085108.25532-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: trace: Add runtime trace filtering mechanism

2020-12-07T14:22:05+00:00

The "filter" debugfs file defines the log levels used by the firmware and reported by sof-logger. The file contains the formatted entry list, where each entry follows the following syntax in plain text: log_level uuid_id pipe_id comp_id; This file may be updated by userspace applications such sof-logger, or directly by the user during debugging process. An unused (wildcard) pipe_id or comp_id value should be set to -1, uuid_id is hexadecimal value, so when unused then should be set to 0. When the file is modified, an IPC command is sent to FW with new trace levels for selected components in filter elements list. Signed-off-by: Karol Trzcinski Reviewed-by: Guennadi Liakhovetski Signed-off-by: Kai Vehmanen Link: https://lore.kernel.org/r/20201204165014.2697903-1-kai.vehmanen@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF/Intel: clarify SPDX license with GPL-2.0-only

2020-05-01T16:45:24+00:00

Remove the ambiguity with GPL-2.0 and use an explicit GPL-2.0-only tag. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Daniel Baluta Reviewed-by: Kai Vehmanen Reviewed-by: Guennadi Liakhovetski Link: https://lore.kernel.org/r/20200501145850.15178-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: trace: fix unconditional free in trace release

2020-01-27T17:52:09+00:00

Check if DMA pages were successfully allocated in initialization before calling free. For many types of memory (like sgbufs) the extra free is harmless, but not all backends track allocation state, so add an explicit check. Signed-off-by: Kai Vehmanen Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20200124213625.30186-5-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: core: modify the signature for snd_sof_create_page_table

2019-12-09T18:38:01+00:00

Modify the signature for snd_sof_create_page_table to take struct device pointer as an argument instead of struct snd_sof_dev as this will be used by both the SOF core device and its clients. Also, move the definition out of core.c to utils.c. Signed-off-by: Ranjani Sridharan Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20191204211556.12671-6-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: trace: move to opt-in with Kconfig and module parameter

2019-10-01T17:34:06+00:00

In a number of debug cases, the DMA-based trace can add problems (e.g. with HDaudio channel allocation). It also generates additional traffic on the bus and if the DMA handling is unreliable will prevent audio use-cases from working normally. Using the trace also requires tools to be installed on the target. The trace can be instead handled as dynamic debug. We can use a Kconfig to force the trace to be enabled in all cases, or use a module parameter to enable it on a need-basis, e.g. by setting "options snd_sof sof_debug=0x1" in a /etc/modprobe.d file. Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20190927200538.660-4-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: no need to check return value of debugfs_create functions

2019-08-01T12:56:07+00:00

When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Also, if a debugfs call fails, userspace is notified with an error in the log, so no need to log the error again. Because we no longer need to check the return value, there's no need to save the dentry returned by debugfs. Just use the dentry in the file pointer if we really need to figure out the "name" of the file being opened. Cc: Liam Girdwood Cc: Mark Brown Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Ranjani Sridharan Cc: Pierre-Louis Bossart Cc: alsa-devel@alsa-project.org Signed-off-by: Greg Kroah-Hartman Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20190731131716.9764-3-gregkh@linuxfoundation.org Signed-off-by: Mark Brown

ASoC: SOF: send time stamp to FW for alignment

2019-06-03T17:41:23+00:00

Timer will be reset when DSP is powered down. So the time stamp of trace log will be reset after resume. Send time stamp to FW can align the time stamp and avoid reset time stamp in trace log. Signed-off-by: Bard liao Signed-off-by: Pierre-Louis Bossart Signed-off-by: Mark Brown

ASoC: SOF: force end-of-file for debugfs trace at suspend

2019-05-28T14:52:34+00:00

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 Signed-off-by: Pierre-Louis Bossart Signed-off-by: Mark Brown

ASoC: SOF: trace: remove code duplication in sof_wait_trace_avail()

2019-05-28T14:52:14+00:00

Move duplicated code in sof_wait_trace_avail() to a helper function. Signed-off-by: Kai Vehmanen Signed-off-by: Pierre-Louis Bossart Signed-off-by: Mark Brown