diff options
| author | Bard Liao <yung-chuan.liao@linux.intel.com> | 2025-10-14 11:14:48 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2025-12-08 12:37:26 +0530 |
| commit | 167efc6dfd621494c6a7e47115dc829dcc0e502c (patch) | |
| tree | 50fccbc9c416b5e04c138860424cdf9162694cf8 /sound | |
| parent | 57b3a7b27e0b72df4ccee89719de12719aa9d547 (diff) | |
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: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://patch.msgid.link/20251014031450.3781789-6-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/sof/intel/hda-sdw-bpt.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda-sdw-bpt.c b/sound/soc/sof/intel/hda-sdw-bpt.c index ff5abccf0d88..e45dd051ab8c 100644 --- a/sound/soc/sof/intel/hda-sdw-bpt.c +++ b/sound/soc/sof/intel/hda-sdw-bpt.c @@ -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, |