kernel/linux.git/sound/soc/sof/sof-audio.c, branch v7.0-rc7

ASoC: SOF: sof-audio: Add support for loopback capture

2026-02-04T13:26:08+00:00

An example of a DAI-less loopback pipeline would be the echo reference capture in the speaker playback path. This pipeline is set up as follows: Host(Playback) -> mixin -> mixout -> gain -> module-copier -> DAI | V Host(Capture) <- Process module <- virtual DAI In the above example, the virtual DAI exploits the concept of an aggregated DAI (one with a non-zero DAI ID) in topology to enable this pipeline to work with DPCM. A virtual DAI is a DAI widget with a non-zero DAI ID and hence is skipped when traversing the list of DAPM widgets during widget prepare/set/up/free/unprepare. The process module in the above pipeline generates 0's that are captured by the echo reference PCM. When the playback path is active, the process module acts as a passthrough module to allow the playback samples to be passthrough to the capture host. In order for these pipelines to work properly, the logic for setting/preparing/freeing/unpreparing the widgets needs to be amended to make sure that only the widgets that are in the pipeline in the same direction as the PCM being started are set up. For example, when the playback PCM is started, the capture pipeline widgets also show up in the list of connected DAPM widgets but they shouldn't be set up yet because the echo reference capture PCM hasn't been started yet. Alternatively, when the echo reference capture PCM is started, the playback pipeline widgets should not be setup. Finally, the last step needed to put this all together is the set the routes for widgets connecting the playback and the capture pipelines when both are active. Signed-off-by: Ranjani Sridharan Reviewed-by: Péter Ujfalusi Reviewed-by: Bard Liao Signed-off-by: Peter Ujfalusi Link: https://patch.msgid.link/20260204081833.16630-9-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: sof-audio: Traverse paths with aggregated DAI widgets

2026-02-04T13:26:07+00:00

Aggregated DAI widgets exist in topology for representation and are not actually initialized in the firmware. But in preparation for using this as a virtual DAI for loopback capture, make sure that we can traverse the path from an aggregated DAI widget to the host widget. Signed-off-by: Ranjani Sridharan Reviewed-by: Péter Ujfalusi Reviewed-by: Bard Liao Signed-off-by: Peter Ujfalusi Link: https://patch.msgid.link/20260204081833.16630-8-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: pcm: Split up widget prepare and setup

2026-02-04T13:26:02+00:00

Widgets are set up in 2 steps, first ipc_prepare followed by the actual IPC sent to the DSP to set up the widget. Split these 2 steps to do the ipc_prepare during hw_params and the setting up in the prepare callback. This will allow for future modifications to pipeline set up to be split up between the FE and BE DAI prepare ops. Signed-off-by: Ranjani Sridharan Reviewed-by: Bard Liao Reviewed-by: Péter Ujfalusi Reviewed-by: Liam Girdwood Signed-off-by: Peter Ujfalusi Link: https://patch.msgid.link/20260204081833.16630-3-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: Use guard()/scoped_guard() for mutex locks where it makes sense

2026-01-12T11:21:24+00:00

Replace the manual mutex lock/unlock pairs with guard()/scoped_guard(). Only code refactoring, and no behavior change. Signed-off-by: Peter Ujfalusi Reviewed-by: Daniel Baluta Reviewed-by: Ranjani Sridharan Link: https://patch.msgid.link/20260112101004.7648-2-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: Relocate and rework functionality for PCM stream freeing

2025-02-06T11:25:41+00:00

Move the sof_pcm_stream_free() from sof-audio.c to pcm.c as static function and add wrapper to free all active stream, which is going to be used in ipc3/4 topology code (removes duplicated code). With this change most of the PCM stream related code is located in one source file for easier lookup and simplified flow. Signed-off-by: Peter Ujfalusi Reviewed-by: Liam Girdwood Reviewed-by: Bard Liao Reviewed-by: Ranjani Sridharan Link: https://patch.msgid.link/20250206092828.7569-2-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown

ASoC: Merge up fixes

2024-06-21T12:17:21+00:00

We need some of the AMD fixes as a base for new work.

ASoC: SOF: sof-audio: Skip unprepare for in-use widgets on error rollback

2024-06-12T17:26:30+00:00

If the ipc_prepare() callback fails for a module instance, on error rewind we must skip the ipc_unprepare() call for ones that has positive use count. The positive use count means that the module instance is in active use, it cannot be unprepared. The issue affects capture direction paths with branches (single dai with multiple PCMs), the affected widgets are in the shared part of the paths. Signed-off-by: Peter Ujfalusi Reviewed-by: Pierre-Louis Bossart Reviewed-by: Kai Vehmanen Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20240612121203.15468-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: sof-audio: add sof_dai_get_tdm_slots function

2024-05-29T10:10:54+00:00

An new interface, sof_dai_get_tdm_slots(), is added for machine driver to get tdm slot number from topology. The dai_get_param() callback needs to support new parameter type SOF_DAI_PARAM_INTEL_SSP_TDM_SLOTS by returning the tdm slot number of specific SSP port. Reviewed-by: Bard Liao Signed-off-by: Brent Lu Signed-off-by: Pierre-Louis Bossart Link: https://msgid.link/r/20240527193552.165567-14-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: sof-audio: rename dai clock setting query function

2024-05-29T10:10:53+00:00

We are going to extend the dai_get_clk() callback function to retrieve other dai-specific settings like tdm slot number, not just mclk/bclk frequencies. Revisit functions and macros related to the callback and replace the string 'clk' with 'param' to reflect the ongoing change. Reviewed-by: Bard Liao Signed-off-by: Brent Lu Signed-off-by: Pierre-Louis Bossart Link: https://msgid.link/r/20240527193552.165567-13-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: Intel: clarify Copyright information

2024-05-06T14:59:35+00:00

For some reason a number of files included the "All rights reserved" statement. Good old copy-paste made sure this mistake proliferated. Remove the "All rights reserved" in all Intel-copyright to align with internal guidance. Reviewed-by: Cezary Rojewski Signed-off-by: Pierre-Louis Bossart Reviewed-by: Bard Liao Reviewed-by: Péter Ujfalusi Link: https://lore.kernel.org/r/20240503140359.259762-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown