kernel/linux.git/sound/soc/sof/compress.c, branch v6.18.22

ALSA: compress_offload: Add 64-bit safe timestamp infrastructure

2025-09-08T07:33:24+00:00

The copied_total field in struct snd_compr_tstamp is a 32-bit value that can overflow on long-running high-bitrate streams, leading to incorrect calculations for buffer availablility. This patch adds a 64-bit safe timestamping mechanism. A new UAPI struct, snd_compr_tstamp64, is added which uses 64-bit types for byte counters. The relevant ops structures across the ASoC and core compress code are updated to use this new struct. ASoC drivers are updated to use u64 counters. Internal timestamps being u64 now, a compatibility function is added to convert the 64-bit timestamp back to the 32-bit format for legacy ioctl callers. Reviewed-by: Miller Liang Tested-by: Joris Verhaegen Signed-off-by: Joris Verhaegen Reviewed-by: Srinivas Kandagatla Reviewed-by: Charles Keepax Acked-by: Mark Brown Acked-by: Vinod Koul Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250905091301.2711705-2-verhaegen@google.com

ASoC: SOF: Use no_reply calls for TX

2023-04-20T11:51:45+00:00

Convert all existing calls that pass "NULL, 0" for reply data to the new no_reply calls. Also convert any calls that pass in data but don't actually parse the result. Signed-off-by: Curtis Malainey Signed-off-by: Pierre-Louis Bossart Reviewed-by: Bard Liao Reviewed-by: Péter Ujfalusi Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20230419194057.42205-3-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Set compress data offset

2023-01-17T13:37:54+00:00

Because now snd_sof_set_stream_data_offset has compress support we use it to set posn_offset for compress stream. Reviewed-by: Paul Olaru Reviewed-by: Iuliana Prodan Reviewed-by: Ranjani Sridharan Reviewed-by: Peter Ujfalusi Signed-off-by: Daniel Baluta Link: https://lore.kernel.org/r/20230117122533.201708-5-daniel.baluta@oss.nxp.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Add copy function for capture case

2022-08-31T11:12:59+00:00

Added a new copy function used to copy data to user buffer in the case of compress capture. Reviewed-by: Paul Olaru Reviewed-by: Daniel Baluta Signed-off-by: Laurentiu Mihalcea Link: https://lore.kernel.org/r/20220822101502.17644-3-laurentiu.mihalcea@nxp.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Move sof_compr_copy functionality

2022-08-31T11:12:58+00:00

Since we're preparing to add support for compress capture, we need to move the content of sof_compr_copy into a separate function which handles the playback direction just like the initial sof_compr_copy. Reviewed-by: Paul Olaru Reviewed-by: Daniel Baluta Signed-off-by: Laurentiu Mihalcea Link: https://lore.kernel.org/r/20220822101502.17644-2-laurentiu.mihalcea@nxp.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Remove dai_posn variable

2022-08-23T12:04:52+00:00

dai_posn is set but never used. Initial intention was to use dai_posn to shorthen one code line but it looks fine without it too. Fixes: c1a731c71359 ("ASoC: SOF: compress: Add support for computing timestamps") Reported-by: kernel test robot Signed-off-by: Daniel Baluta Link: https://lore.kernel.org/r/20220822174937.254873-1-daniel.baluta@oss.nxp.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Add support for computing timestamps

2022-08-17T12:00:24+00:00

We compute the number of pcm_io_frames by dividing the dai position to size of a frame (channels * sample size). Reviewed-by: Paul Olaru Reviewed-by: Pierre-Louis Bossart Signed-off-by: Laurentiu Mihalcea Signed-off-by: Daniel Baluta Link: https://lore.kernel.org/r/20220817080529.10864-5-daniel.baluta@oss.nxp.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Save channel count and sample bytes

2022-08-17T12:00:23+00:00

The purpose of this change is to enable the saving of the channel count and sample container bytes format parameters for later use to compute the timestamps. This is done when setting the compress stream parameters (in sof_compr_set_params). Reviewed-by: Paul Olaru Reviewed-by: Pierre-Louis Bossart Signed-off-by: Laurentiu Mihalcea Signed-off-by: Daniel Baluta Link: https://lore.kernel.org/r/20220817080529.10864-4-daniel.baluta@oss.nxp.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Introduce sof_compr_stream

2022-08-17T12:00:22+00:00

This will keep SOF compress stream private data. So far we used snd_compr_tstamp to hold the private data but this is no longer enough as we need to hold other info like number of channels or sample bytes. Reviewed-by: Paul Olaru Reviewed-by: Pierre-Louis Bossart Signed-off-by: Daniel Baluta Link: https://lore.kernel.org/r/20220817080529.10864-3-daniel.baluta@oss.nxp.com Signed-off-by: Mark Brown

ASoC: SOF: compress: Remove byte offset computation

2022-08-17T12:00:21+00:00

Byte offset is the offset in the ring buffer to the DSP while posn_offset is an offset inside the stream_box where we keep position information. Reviewed-by: Paul Olaru Reviewed-by: Pierre-Louis Bossart Signed-off-by: Daniel Baluta Link: https://lore.kernel.org/r/20220817080529.10864-2-daniel.baluta@oss.nxp.com Signed-off-by: Mark Brown