PulseAudio, PipeWire and CRAS do not use pause push/release, which means that we can optionally disable this capability without any impact on most users. In addition, on some platforms, e.g. based on HDaudio DMAs, support for pause_push/release prevents the system from entering low-power states. This patch suggests an opt-in selection via kconfig or kernel parameter to disable pause. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Reviewed-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx> --- sound/soc/sof/Kconfig | 9 +++++++++ sound/soc/sof/pcm.c | 7 +++++++ 2 files changed, 16 insertions(+) diff --git a/sound/soc/sof/Kconfig b/sound/soc/sof/Kconfig index cd659493b5df..81b834558a2d 100644 --- a/sound/soc/sof/Kconfig +++ b/sound/soc/sof/Kconfig @@ -55,6 +55,15 @@ config SND_SOC_SOF_DEBUG_PROBES Say Y if you want to enable probes. If unsure, select "N". +config SND_SOC_SOF_PCM_DISABLE_PAUSE + bool "SOF disable pause push/release" + help + This option disables ALSA pause push/release capabilities for + SOF drivers. These capabilities are not used by typical + sound servers such as PulseAudio, PipeWire and CRAS. + Say Y if you want to disable pause push/release + If unsure, select "N". + config SND_SOC_SOF_DEVELOPER_SUPPORT bool "SOF developer options support" depends on EXPERT diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c index 9893b182da43..bab837ed8c7f 100644 --- a/sound/soc/sof/pcm.c +++ b/sound/soc/sof/pcm.c @@ -10,6 +10,7 @@ // PCM Layer, interface between ALSA and IPC. // +#include <linux/moduleparam.h> #include <linux/pm_runtime.h> #include <sound/pcm_params.h> #include <sound/sof.h> @@ -20,6 +21,10 @@ #include "compress.h" #endif +static bool pcm_disable_pause = IS_ENABLED(CONFIG_SND_SOC_SOF_PCM_DISABLE_PAUSE); +module_param_named(disable_pause, pcm_disable_pause, bool, 0444); +MODULE_PARM_DESC(disable_pause, "SOF HDA disable pause"); + /* Create DMA buffer page table for DSP */ static int create_page_table(struct snd_soc_component *component, struct snd_pcm_substream *substream, @@ -480,6 +485,8 @@ static int sof_pcm_open(struct snd_soc_component *component, /* set runtime config */ runtime->hw.info = ops->hw_info; /* platform-specific */ + if (pcm_disable_pause) + runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE; /* set any runtime constraints based on topology */ runtime->hw.formats = le64_to_cpu(caps->formats); -- 2.25.1
