The solution used before LunarLake relies on a 'Multi-gateway'
firmware configuration. This is no longer needed with the DMA hardware
handling multiple links directly. To avoid adding a platform-specific
quirk in the generic IPC4 code, this patch resets the device count
when fetching the stream context.
Suggested-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
---
sound/soc/sof/intel/hda-dai-ops.c | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/sound/soc/sof/intel/hda-dai-ops.c b/sound/soc/sof/intel/hda-dai-ops.c
index 4ae211141c40..ae4a5aa73bfc 100644
--- a/sound/soc/sof/intel/hda-dai-ops.c
+++ b/sound/soc/sof/intel/hda-dai-ops.c
@@ -434,6 +434,28 @@ static int hda_ipc4_post_trigger(struct snd_sof_dev *sdev, struct snd_soc_dai *c
return ret;
}
+static struct hdac_ext_stream *sdw_hda_ipc4_get_hext_stream(struct snd_sof_dev *sdev,
+ struct snd_soc_dai *cpu_dai,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget(cpu_dai, substream->stream);
+ struct snd_sof_widget *swidget = w->dobj.private;
+ struct snd_sof_dai *dai = swidget->private;
+ struct sof_ipc4_copier *ipc4_copier = dai->private;
+ struct sof_ipc4_alh_configuration_blob *blob;
+
+ blob = (struct sof_ipc4_alh_configuration_blob *)ipc4_copier->copier_config;
+
+ /*
+ * Starting with ACE_2_0, re-setting the device_count is mandatory to avoid using
+ * the multi-gateway firmware configuration. The DMA hardware can take care of
+ * multiple links without needing any firmware assistance
+ */
+ blob->alh_cfg.device_count = 1;
+
+ return hda_ipc4_get_hext_stream(sdev, cpu_dai, substream);
+}
+
static const struct hda_dai_widget_dma_ops hda_ipc4_dma_ops = {
.get_hext_stream = hda_ipc4_get_hext_stream,
.assign_hext_stream = hda_assign_hext_stream,
@@ -475,7 +497,7 @@ static const struct hda_dai_widget_dma_ops dmic_ipc4_dma_ops = {
};
static const struct hda_dai_widget_dma_ops sdw_ipc4_dma_ops = {
- .get_hext_stream = hda_ipc4_get_hext_stream,
+ .get_hext_stream = sdw_hda_ipc4_get_hext_stream,
.assign_hext_stream = hda_assign_hext_stream,
.release_hext_stream = hda_release_hext_stream,
.setup_hext_stream = hda_setup_hext_stream,
--
2.39.2
