ASoC: SOF: ipc4-topology: Save the DMA maximum burst size for PCMs

When setting up the pcm widget, save the DSP buffer size (in ms) for
platform code to place a constraint on playback.

On playback the DMA will fill the buffer on start and if the period
size is smaller it will immediately overrun.

On capture the DMA will move data in 1ms bursts.

Cc: stable@vger.kernel.org # 6.8
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240321130814.4412-3-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/ipc4-topology.c b/sound/soc/sof/ipc4-topology.c
index da4a83afb87a8a2c4163f34a8d6e9993b92bde77..bb4cf6dd1e1894ec39d1602579ff55e23d162b52 100644 (file)
--- a/sound/soc/sof/ipc4-topology.c
+++ b/sound/soc/sof/ipc4-topology.c
@@ -412,8 +412,9 @@ static int sof_ipc4_widget_setup_pcm(struct snd_sof_widget *swidget)
        struct sof_ipc4_available_audio_format *available_fmt;
        struct snd_soc_component *scomp = swidget->scomp;
        struct sof_ipc4_copier *ipc4_copier;
+       struct snd_sof_pcm *spcm;
        int node_type = 0;
-       int ret;
+       int ret, dir;
 
        ipc4_copier = kzalloc(sizeof(*ipc4_copier), GFP_KERNEL);
        if (!ipc4_copier)
@@ -447,6 +448,25 @@ static int sof_ipc4_widget_setup_pcm(struct snd_sof_widget *swidget)
        }
        dev_dbg(scomp->dev, "host copier '%s' node_type %u\n", swidget->widget->name, node_type);
 
+       spcm = snd_sof_find_spcm_comp(scomp, swidget->comp_id, &dir);
+       if (!spcm)
+               goto skip_gtw_cfg;
+
+       if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
+               struct snd_sof_pcm_stream *sps = &spcm->stream[dir];
+
+               sof_update_ipc_object(scomp, &sps->dsp_max_burst_size_in_ms,
+                                     SOF_COPIER_DEEP_BUFFER_TOKENS,
+                                     swidget->tuples,
+                                     swidget->num_tuples, sizeof(u32), 1);
+               /* Set default DMA buffer size if it is not specified in topology */
+               if (!sps->dsp_max_burst_size_in_ms)
+                       sps->dsp_max_burst_size_in_ms = SOF_IPC4_MIN_DMA_BUFFER_SIZE;
+       } else {
+               /* Capture data is copied from DSP to host in 1ms bursts */
+               spcm->stream[dir].dsp_max_burst_size_in_ms = 1;
+       }
+
 skip_gtw_cfg:
        ipc4_copier->gtw_attr = kzalloc(sizeof(*ipc4_copier->gtw_attr), GFP_KERNEL);
        if (!ipc4_copier->gtw_attr) {