Commit 167efc6d authored by Bard Liao's avatar Bard Liao Committed by Vinod Koul
Browse files

ASoC: SOF: Intel: export hda_sdw_bpt_get_buf_size_aligment 



The dma buffer need to be a multiple of data block size and
the fifo size. Export a function to return the LCM of data
block size and the fifo size.

Signed-off-by: default avatarBard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: default avatarRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://patch.msgid.link/20251014031450.3781789-6-yung-chuan.liao@linux.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 57b3a7b2

include/sound/hda-sdw-bpt.h

+7 −0
Original line number Diff line number Diff line
@@ -30,6 +30,8 @@ int hda_sdw_bpt_wait(struct device *dev, struct hdac_ext_stream *bpt_tx_stream, 
int hda_sdw_bpt_close(struct device *dev, struct hdac_ext_stream *bpt_tx_stream,

		      struct snd_dma_buffer *dmab_tx_bdl, struct hdac_ext_stream *bpt_rx_stream,

		      struct snd_dma_buffer *dmab_rx_bdl);



unsigned int hda_sdw_bpt_get_buf_size_alignment(unsigned int dma_bandwidth);

#else

static inline int hda_sdw_bpt_open(struct device *dev, int link_id,

				   struct hdac_ext_stream **bpt_tx_stream,
@@ -64,6 +66,11 @@ static inline int hda_sdw_bpt_close(struct device *dev, struct hdac_ext_stream * 
	WARN_ONCE(1, "SoundWire BPT is disabled");

	return -EOPNOTSUPP;

}



static inline unsigned int hda_sdw_bpt_get_buf_size_alignment(unsigned int dma_bandwidth)

{

	return 0;

}

#endif



#endif /* __HDA_SDW_BPT_H */

sound/soc/sof/intel/hda-sdw-bpt.c

+13 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
 * Hardware interface for SoundWire BPT support with HDA DMA

 */



#include <linux/lcm.h>

#include <sound/hdaudio_ext.h>

#include <sound/hda-mlink.h>

#include <sound/hda-sdw-bpt.h>
@@ -236,6 +237,18 @@ static int hda_sdw_bpt_dma_disable(struct device *dev, struct hdac_ext_stream *s 
	return ret;

}



#define FIFO_ALIGNMENT	64



unsigned int hda_sdw_bpt_get_buf_size_alignment(unsigned int dma_bandwidth)

{

	unsigned int num_channels = DIV_ROUND_UP(dma_bandwidth, BPT_FREQUENCY * 32);

	unsigned int data_block = num_channels * 4;

	unsigned int alignment = lcm(data_block, FIFO_ALIGNMENT);



	return alignment;

}

EXPORT_SYMBOL_NS(hda_sdw_bpt_get_buf_size_alignment, "SND_SOC_SOF_INTEL_HDA_SDW_BPT");



int hda_sdw_bpt_open(struct device *dev, int link_id, struct hdac_ext_stream **bpt_tx_stream,

		     struct snd_dma_buffer *dmab_tx_bdl, u32 bpt_tx_num_bytes,

		     u32 tx_dma_bandwidth, struct hdac_ext_stream **bpt_rx_stream,