6.8-stable review patch. If anyone has any objections, please let me know.
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From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
[ Upstream commit 831045513c8a2ef14c3cf39b33d1ccedf588c4a8 ]
The existing code derives the channel map used to program the HDaudio link DMA from the hw_params, but that is not quite right in the case of aggregation. The code in soc-pcm.c splits the hw_params depending on the codec_ch_map, and we need to reconstruct the channel-map to insert the data in the right places.
This issue is seen only on amplifier feedback capture where the data from the second amplifier was replaced by that of the first amplifier.
Note that the loop iterator of the macro for_each_rtd_cpu_dais() is reused in a following loop. This is different to all existing usages of that macro, hence the use of a boolean flag to avoid an access to an uninitialized variable.
Fixes: 2960ee5c4814 ("ASoC: SOF: Intel: hda-dai: add helpers for SoundWire callbacks") Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com Reviewed-by: Rander Wang rander.wang@intel.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Link: https://msgid.link/r/20240402151828.175002-2-pierre-louis.bossart@linux.inte... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/sof/intel/hda-dai.c | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-)
diff --git a/sound/soc/sof/intel/hda-dai.c b/sound/soc/sof/intel/hda-dai.c index f4cbc0ad5de3b..0e665c0840d71 100644 --- a/sound/soc/sof/intel/hda-dai.c +++ b/sound/soc/sof/intel/hda-dai.c @@ -434,10 +434,17 @@ int sdw_hda_dai_hw_params(struct snd_pcm_substream *substream, int link_id) { struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget(cpu_dai, substream->stream); + struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); const struct hda_dai_widget_dma_ops *ops; + struct snd_soc_dai_link_ch_map *ch_maps; struct hdac_ext_stream *hext_stream; + struct snd_soc_dai *dai; struct snd_sof_dev *sdev; + bool cpu_dai_found = false; + int cpu_dai_id; + int ch_mask; int ret; + int j;
ret = non_hda_dai_hw_params(substream, params, cpu_dai); if (ret < 0) { @@ -452,9 +459,29 @@ int sdw_hda_dai_hw_params(struct snd_pcm_substream *substream, if (!hext_stream) return -ENODEV;
- /* in the case of SoundWire we need to program the PCMSyCM registers */ + /* + * in the case of SoundWire we need to program the PCMSyCM registers. In case + * of aggregated devices, we need to define the channel mask for each sublink + * by reconstructing the split done in soc-pcm.c + */ + for_each_rtd_cpu_dais(rtd, cpu_dai_id, dai) { + if (dai == cpu_dai) { + cpu_dai_found = true; + break; + } + } + + if (!cpu_dai_found) + return -ENODEV; + + ch_mask = 0; + for_each_link_ch_maps(rtd->dai_link, j, ch_maps) { + if (ch_maps->cpu == cpu_dai_id) + ch_mask |= ch_maps->ch_mask; + } + ret = hdac_bus_eml_sdw_map_stream_ch(sof_to_bus(sdev), link_id, cpu_dai->id, - GENMASK(params_channels(params) - 1, 0), + ch_mask, hdac_stream(hext_stream)->stream_tag, substream->stream); if (ret < 0) {