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ASoC: SOF: Intel: hda-sdw-bpt: add helpers for SoundWire BPT DMA
Add SoundWire BPT DMA helpers as a separate module to avoid circular dependencies. For now this assumes no link DMA, only coupled mode. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Acked-by: Mark Brown <broonie@kernel.org> Tested-by: shumingf@realtek.com Link: https://lore.kernel.org/r/20250227140615.8147-12-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
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‎include/sound/hda-sdw-bpt.h

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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
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/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* Copyright(c) 2025 Intel Corporation.
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*/
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#ifndef __HDA_SDW_BPT_H
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#define __HDA_SDW_BPT_H
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#include <linux/device.h>
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struct hdac_ext_stream;
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struct snd_dma_buffer;
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#if IS_ENABLED(CONFIG_SND_SOF_SOF_HDA_SDW_BPT)
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int hda_sdw_bpt_open(struct device *dev, int link_id, struct hdac_ext_stream **bpt_tx_stream,
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struct snd_dma_buffer *dmab_tx_bdl, u32 bpt_tx_num_bytes,
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u32 tx_dma_bandwidth, struct hdac_ext_stream **bpt_rx_stream,
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struct snd_dma_buffer *dmab_rx_bdl, u32 bpt_rx_num_bytes,
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u32 rx_dma_bandwidth);
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int hda_sdw_bpt_send_async(struct device *dev, struct hdac_ext_stream *bpt_tx_stream,
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struct hdac_ext_stream *bpt_rx_stream);
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int hda_sdw_bpt_wait(struct device *dev, struct hdac_ext_stream *bpt_tx_stream,
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struct hdac_ext_stream *bpt_rx_stream);
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int hda_sdw_bpt_close(struct device *dev, struct hdac_ext_stream *bpt_tx_stream,
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struct snd_dma_buffer *dmab_tx_bdl, struct hdac_ext_stream *bpt_rx_stream,
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struct snd_dma_buffer *dmab_rx_bdl);
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#else
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static inline int hda_sdw_bpt_open(struct device *dev, int link_id,
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struct hdac_ext_stream **bpt_tx_stream,
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struct snd_dma_buffer *dmab_tx_bdl, u32 bpt_tx_num_bytes,
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u32 tx_dma_bandwidth, struct hdac_ext_stream **bpt_rx_stream,
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struct snd_dma_buffer *dmab_rx_bdl, u32 bpt_rx_num_bytes,
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u32 rx_dma_bandwidth)
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{
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WARN_ONCE(1, "SoundWire BPT is disabled");
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return -EOPNOTSUPP;
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}
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static inline int hda_sdw_bpt_send_async(struct device *dev, struct hdac_ext_stream *bpt_tx_stream,
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struct hdac_ext_stream *bpt_rx_stream)
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{
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WARN_ONCE(1, "SoundWire BPT is disabled");
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return -EOPNOTSUPP;
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}
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static inline int hda_sdw_bpt_wait(struct device *dev, struct hdac_ext_stream *bpt_tx_stream,
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struct hdac_ext_stream *bpt_rx_stream)
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{
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WARN_ONCE(1, "SoundWire BPT is disabled");
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return -EOPNOTSUPP;
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}
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static inline int hda_sdw_bpt_close(struct device *dev, struct hdac_ext_stream *bpt_tx_stream,
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struct snd_dma_buffer *dmab_tx_bdl,
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struct hdac_ext_stream *bpt_rx_stream,
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struct snd_dma_buffer *dmab_rx_bdl)
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{
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WARN_ONCE(1, "SoundWire BPT is disabled");
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return -EOPNOTSUPP;
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}
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#endif
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#endif /* __HDA_SDW_BPT_H */

‎sound/soc/sof/intel/Kconfig

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@@ -268,6 +268,7 @@ config SND_SOC_SOF_INTEL_LNL
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tristate
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select SND_SOC_SOF_HDA_GENERIC
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select SND_SOC_SOF_INTEL_SOUNDWIRE_LINK_BASELINE
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select SND_SOF_SOF_HDA_SDW_BPT if SND_SOC_SOF_INTEL_SOUNDWIRE
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select SND_SOC_SOF_IPC4
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select SND_SOC_SOF_INTEL_MTL
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@@ -342,6 +343,12 @@ config SND_SOC_SOF_HDA_AUDIO_CODEC
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endif ## SND_SOC_SOF_HDA_GENERIC
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config SND_SOF_SOF_HDA_SDW_BPT
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tristate
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help
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This option is not user-selectable but automagically handled by
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'select' statements at a higher level.
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config SND_SOC_SOF_HDA_LINK_BASELINE
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tristate
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select SND_SOC_SOF_HDA if SND_SOC_SOF_HDA_LINK

‎sound/soc/sof/intel/Makefile

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@@ -12,6 +12,8 @@ snd-sof-intel-hda-generic-y := hda.o hda-common-ops.o
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snd-sof-intel-hda-mlink-y := hda-mlink.o
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snd-sof-intel-hda-sdw-bpt-objs := hda-sdw-bpt.o
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snd-sof-intel-hda-common-$(CONFIG_SND_SOC_SOF_HDA_PROBES) += hda-probes.o
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snd-sof-intel-hda-y := hda-codec.o
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obj-$(CONFIG_SND_SOC_SOF_HDA_MLINK) += snd-sof-intel-hda-mlink.o
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obj-$(CONFIG_SND_SOC_SOF_HDA) += snd-sof-intel-hda.o
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obj-$(CONFIG_SND_SOF_SOF_HDA_SDW_BPT) += snd-sof-intel-hda-sdw-bpt.o
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snd-sof-pci-intel-tng-y := pci-tng.o
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snd-sof-pci-intel-skl-y := pci-skl.o skl.o hda-loader-skl.o
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snd-sof-pci-intel-apl-y := pci-apl.o apl.o

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